Left Knee - Osteoarthritis — example DVA determination letter

Reference Determination Content

Suggested draft · fictitious patient

Example document — fictitious patient. This is a suggested draft determination prepared by the Veterans Health Centre from the matching example Diagnostic Assessment, to show how a DVA delegate could determine the claim. The veteran is fictitious: names, dates, service details and clinicians have been invented. It is not a decision of the Department of Veterans' Affairs and must not be relied upon as a record of any real claim.

Left Knee - Osteoarthritis

Evidence

The evidence that I have considered in making this decision includes:

Formal Claim with supporting statements;
A Statement of your Service from the Department of Defence;
Copies of your Service Medical Records.
A Diagnostic Assessment by Dr Thomas Perkins, General Practitioner, Veterans Health Centre, dated 18 March 2025;
A Diagnosis Form (D9287) by Dr Thomas Perkins, General Practitioner, Veterans Health Centre, dated 18 March 2025;
An emergency department record by the x-ray and CT left knee, Military hospital, dated 3 August 1991;
An arthroscopy report by the orthopaedic surgeon, dated 3 October 1991;
A microbiology and operation report by the orthopaedic surgeon, dated 14 October 1991;
A field hospital admission and operation report by the surgeon, Somalia, dated 24 March 1993;
A rheumatology consultation by the rheumatologist, dated 22 June 1994;
An outpatient health record and synovial fluid analysis by the medical officer, Garrison health centre, dated 9 March 1998;
A field hospital admission and CT left knee by the surgeon, East Timor, dated 2 December 1999;
An arthroscopy report by the orthopaedic surgeon, dated 14 February 2000;
An MRI left knee by the radiologist, dated 11 April 2002;
Nerve conduction studies by the neurologist, dated 13 June 2003;
A periodic health examination and X-rays by the medical officer and orthopaedic surgeon, dated 18 August 2004;
A deployed health record by the medical officer, Afghanistan, dated 13 January 2006;
An outpatient health record by the medical officer, Garrison health centre, dated 21 June 2006;
An X-ray left knee by the radiologist, dated 27 June 2006;
An X-ray and MRI left knee and orthopaedic consultation by the orthopaedic surgeon, dated 22 September 2010.

Your service

I have identified that you have the following service:
Australian Defence Force service between :

20 January 1983 and 11 November 2011

Left Knee - Osteoarthritis

You have stated that your condition was caused by:

having inflammatory joint disease as specified, of the affected joint before the clinical onset of osteoarthritis in that joint
having an infection of the affected joint as specified before the clinical onset of osteoarthritis in that joint
having an intra-articular fracture of the affected joint before the clinical onset of osteoarthritis in that joint
having haemarthrosis of the affected joint before the clinical onset of osteoarthritis in that joint
having a depositional joint disease as specified, in the affected joint before the clinical onset of osteoarthritis in that joint
having trauma to the affected joint within the 25 years before the clinical onset of osteoarthritis in that joint
having an acute articular cartilage tear of the affected joint within the 25 years before the clinical onset of osteoarthritis in that joint
having an acute meniscal tear of the affected knee within the 25 years before the clinical onset of osteoarthritis in that joint
having frostbite involving the affected joint before the clinical onset of osteoarthritis in that joint
having disordered joint mechanics of the affected joint for at least five years before the clinical onset of osteoarthritis in that joint
having necrosis of the subchondral bone near the affected joint, including that from dysbaric osteonecrosis, before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the upper limb only, performing any combination of repetitive activities or tasks involving repeated or sustained pinch grip or hand/power grip, for an average of at least 30 hours per week, for a cumulative period of at least ten years within a continuous period of 15 years, before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the hand, wrist or elbow joint only, using a hand-held, vibrating percussive tool or object on more days than not, for a cumulative period of at least ten years, within the 25 years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: having: (i) an amputation involving either leg; or (ii) an asymmetric gait; for at least five years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: lifting loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 150 000 kilograms within any ten year period before the clinical onset of osteoarthritis in that joint; and (ii) where the clinical onset of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: carrying loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 3 800 hours within any ten year period before the clinical onset of osteoarthritis in that joint; and (ii) where the clinical onset of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: ascending or descending at least 150 stairs or rungs of a ladder per day, on more days than not, for a continuous period of at least five years, within the 25 years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: having increased bone mineral density before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: being overweight for at least ten years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for males, having a waist circumference exceeding 102 centimetres for at least ten years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for females, having a waist circumference exceeding 88 centimetres for at least ten years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a hip or knee joint only: (a) kneeling or squatting for a cumulative period of at least one hour per day, on more days than not, for a continuous period of at least two years before the clinical onset of osteoarthritis in that joint; and (b) where the clinical onset of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a knee joint only, having internal derangement of the affected joint before the clinical onset of osteoarthritis in that joint
for osteoarthritis of the patello-femoral joint only, having chondromalacia patella before the clinical onset of osteoarthritis in that joint
having a disorder associated with loss of pain sensation or proprioception involving the affected joint before the clinical onset of osteoarthritis in that joint
having Paget's disease of bone of the affected joint before the clinical onset of osteoarthritis in that joint
having acromegaly before the clinical onset of osteoarthritis in that joint
having joint instability or dislocation of the affected joint, at least one year before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a hip joint only, having femoroacetabular impingement syndrome of the affected joint, before the clinical onset of osteoarthritis in that joint

Diagnosis: Osteoarthritis

Basis of diagnosis: The diagnosis was made in the Diagnostic Assessment by Dr Thomas Perkins dated 18 March 2025, and is supported by an X-ray left knee by the radiologist, dated 27 June 2006.

I am satisfied this is the appropriate diagnosis.
In determining your claim for this condition, I have applied the SOP:

Statement of Principles concerning Osteoarthritis (Balance of Probabilities) (No. 62 of 2017)

which sets out the factors that can connect the condition with service.

I am satisfied that you have met the following factor:

having inflammatory joint disease as specified, of the affected joint before the clinical onset of osteoarthritis in that joint
having an infection of the affected joint as specified before the clinical onset of osteoarthritis in that joint
having an intra-articular fracture of the affected joint before the clinical onset of osteoarthritis in that joint
having haemarthrosis of the affected joint before the clinical onset of osteoarthritis in that joint
having a depositional joint disease as specified, in the affected joint before the clinical onset of osteoarthritis in that joint
having trauma to the affected joint within the 25 years before the clinical onset of osteoarthritis in that joint
having an acute articular cartilage tear of the affected joint within the 25 years before the clinical onset of osteoarthritis in that joint
having an acute meniscal tear of the affected knee within the 25 years before the clinical onset of osteoarthritis in that joint
having frostbite involving the affected joint before the clinical onset of osteoarthritis in that joint
having disordered joint mechanics of the affected joint for at least five years before the clinical onset of osteoarthritis in that joint
having necrosis of the subchondral bone near the affected joint, including that from dysbaric osteonecrosis, before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the upper limb only, performing any combination of repetitive activities or tasks involving repeated or sustained pinch grip or hand/power grip, for an average of at least 30 hours per week, for a cumulative period of at least ten years within a continuous period of 15 years, before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the hand, wrist or elbow joint only, using a hand-held, vibrating percussive tool or object on more days than not, for a cumulative period of at least ten years, within the 25 years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: having: (i) an amputation involving either leg; or (ii) an asymmetric gait; for at least five years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: lifting loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 150 000 kilograms within any ten year period before the clinical onset of osteoarthritis in that joint; and (ii) where the clinical onset of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: carrying loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 3 800 hours within any ten year period before the clinical onset of osteoarthritis in that joint; and (ii) where the clinical onset of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: ascending or descending at least 150 stairs or rungs of a ladder per day, on more days than not, for a continuous period of at least five years, within the 25 years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: having increased bone mineral density before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: being overweight for at least ten years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for males, having a waist circumference exceeding 102 centimetres for at least ten years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for females, having a waist circumference exceeding 88 centimetres for at least ten years before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a hip or knee joint only: (a) kneeling or squatting for a cumulative period of at least one hour per day, on more days than not, for a continuous period of at least two years before the clinical onset of osteoarthritis in that joint; and (b) where the clinical onset of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a knee joint only, having internal derangement of the affected joint before the clinical onset of osteoarthritis in that joint
for osteoarthritis of the patello-femoral joint only, having chondromalacia patella before the clinical onset of osteoarthritis in that joint
having a disorder associated with loss of pain sensation or proprioception involving the affected joint before the clinical onset of osteoarthritis in that joint
having Paget's disease of bone of the affected joint before the clinical onset of osteoarthritis in that joint
having acromegaly before the clinical onset of osteoarthritis in that joint
having joint instability or dislocation of the affected joint, at least one year before the clinical onset of osteoarthritis in that joint
for osteoarthritis of a hip joint only, having femoroacetabular impingement syndrome of the affected joint, before the clinical onset of osteoarthritis in that joint

I have noted your contention as to the cause of this condition. The available evidence indicates, I have noted your contention to the cause of your condition. Your service medical records indicate that you presented to the health facility with activity-related aching pain in the lateral left knee, morning stiffness of about 30 minutes, pain on stairs, kneeling and squatting, and stiffness after sitting on 21 June 2006.

The diagnosis was confirmed by X-ray of the left knee on 27 June 2006, which showed narrowing of the lateral tibiofemoral joint space with marginal osteophytes and subchondral sclerosis, Kellgren-Lawrence grade 2. With the pain, stiffness and impaired function recorded on 21 June 2006, this meets the Statement of Principles definition of osteoarthritis: a degenerative joint disorder with clinical manifestations of pain, impaired function and stiffness and radiological evidence of loss of articular cartilage and osteophytes.

This has then led to further investigations and the diagnosis of your condition of Osteoarthritis. I have accepted your condition of Osteoarthritis.

Having considered your service records and the available medical evidence, I am satisfied the SOP is met and that this condition is related to your peacetime service.

I have therefore accepted that this condition is related to your service with effect from 14 June 2006.

Left Knee - Osteoarthritis (Worsening)

Evidence

The evidence that I have considered in making this decision includes:

Formal Claim with supporting statements;
A Statement of your Service from the Department of Defence;
Copies of your Service Medical Records.
A Diagnostic Assessment by Dr Thomas Perkins, General Practitioner, Veterans Health Centre, dated 18 March 2025;
A Diagnosis Form (D9287) by Dr Thomas Perkins, General Practitioner, Veterans Health Centre, dated 18 March 2025;
An emergency department record by the x-ray and CT left knee, Military hospital, dated 3 August 1991;
An arthroscopy report by the orthopaedic surgeon, dated 3 October 1991;
A microbiology and operation report by the orthopaedic surgeon, dated 14 October 1991;
A field hospital admission and operation report by the surgeon, Somalia, dated 24 March 1993;
A rheumatology consultation by the rheumatologist, dated 22 June 1994;
An outpatient health record and synovial fluid analysis by the medical officer, Garrison health centre, dated 9 March 1998;
A field hospital admission and CT left knee by the surgeon, East Timor, dated 2 December 1999;
An arthroscopy report by the orthopaedic surgeon, dated 14 February 2000;
An MRI left knee by the radiologist, dated 11 April 2002;
Nerve conduction studies by the neurologist, dated 13 June 2003;
A periodic health examination and X-rays by the medical officer and orthopaedic surgeon, dated 18 August 2004;
A deployed health record by the medical officer, Afghanistan, dated 13 January 2006;
An outpatient health record by the medical officer, Garrison health centre, dated 21 June 2006;
An X-ray left knee by the radiologist, dated 27 June 2006;
An X-ray and MRI left knee and orthopaedic consultation by the orthopaedic surgeon, dated 22 September 2010.

Your service

I have identified that you have the following service:
Australian Defence Force service between :

20 January 1983 and 11 November 2011

Left Knee - Osteoarthritis (Worsening)

You have stated that the worsening of your condition was caused by:

having inflammatory joint disease as specified, of the affected joint before the clinical worsening of osteoarthritis in that joint
having an infection of the affected joint as specified before the clinical worsening of osteoarthritis in that joint
having an intra-articular fracture of the affected joint before the clinical worsening of osteoarthritis in that joint
having haemarthrosis of the affected joint before the clinical worsening of osteoarthritis in that joint
having a depositional joint disease as specified, in the affected joint before the clinical worsening of osteoarthritis in that joint
having trauma to the affected joint within the 25 years before the clinical worsening of osteoarthritis in that joint
having an acute articular cartilage tear of the affected joint within the 25 years before the clinical worsening of osteoarthritis in that joint
having an acute meniscal tear of the affected knee within the 25 years before the clinical worsening of osteoarthritis in that joint
having frostbite involving the affected joint before the clinical worsening of osteoarthritis in that joint
having disordered joint mechanics of the affected joint for at least five years before the clinical worsening of osteoarthritis in that joint
having necrosis of the subchondral bone near the affected joint, including that from dysbaric osteonecrosis, before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the upper limb only, performing any combination of repetitive activities or tasks involving repeated or sustained pinch grip or hand/power grip, for an average of at least 30 hours per week, for a cumulative period of at least ten years within a continuous period of 15 years, before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the hand, wrist or elbow joint only, using a hand-held, vibrating percussive tool or object on more days than not, for a cumulative period of at least ten years, within the 25 years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: having: (i) an amputation involving either leg; or (ii) an asymmetric gait; for at least five years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: lifting loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 150 000 kilograms within any ten year period before the clinical worsening of osteoarthritis in that joint; and (ii) where the clinical worsening of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: carrying loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 3 800 hours within any ten year period before the clinical worsening of osteoarthritis in that joint; and (ii) where the clinical worsening of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: ascending or descending at least 150 stairs or rungs of a ladder per day, on more days than not, for a continuous period of at least five years, within the 25 years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: being overweight for at least ten years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for males, having a waist circumference exceeding 102 centimetres for at least ten years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for females, having a waist circumference exceeding 88 centimetres for at least ten years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a hip or knee joint only: (a) kneeling or squatting for a cumulative period of at least one hour per day, on more days than not, for a continuous period of at two years before the clinical worsening of osteoarthritis in that joint; and (b) where the clinical worsening of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a knee joint only, having internal derangement of the affected joint before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of the patello-femoral joint only, having chondromalacia patella before the clinical worsening of osteoarthritis in that joint
having a disorder associated with loss of pain sensation or proprioception involving the affected joint before the clinical worsening of osteoarthritis in that joint
having Paget's disease of bone of the affected joint before the clinical worsening of osteoarthritis in that joint
having acromegaly before the clinical worsening of osteoarthritis in that joint
having joint instability or dislocation of the affected joint, at least one year before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a hip joint only, having femoroacetabular impingement syndrome of the affected joint, before the clinical worsening of osteoarthritis in that joint
inability to obtain appropriate clinical management for osteoarthritis

Diagnosis: Osteoarthritis (Worsening)

Basis of diagnosis: The diagnosis was made in the Diagnostic Assessment by Dr Thomas Perkins dated 18 March 2025, and is supported by an X-ray left knee by the radiologist, dated 27 June 2006.

I am satisfied this is the appropriate diagnosis.
In determining your claim for this condition, I have applied the SOP:

Statement of Principles concerning Osteoarthritis (Balance of Probabilities) (No. 62 of 2017)

which sets out the factors that can connect the condition with service.

I am satisfied that you have met the following factor:

having inflammatory joint disease as specified, of the affected joint before the clinical worsening of osteoarthritis in that joint
having an infection of the affected joint as specified before the clinical worsening of osteoarthritis in that joint
having an intra-articular fracture of the affected joint before the clinical worsening of osteoarthritis in that joint
having haemarthrosis of the affected joint before the clinical worsening of osteoarthritis in that joint
having a depositional joint disease as specified, in the affected joint before the clinical worsening of osteoarthritis in that joint
having trauma to the affected joint within the 25 years before the clinical worsening of osteoarthritis in that joint
having an acute articular cartilage tear of the affected joint within the 25 years before the clinical worsening of osteoarthritis in that joint
having an acute meniscal tear of the affected knee within the 25 years before the clinical worsening of osteoarthritis in that joint
having frostbite involving the affected joint before the clinical worsening of osteoarthritis in that joint
having disordered joint mechanics of the affected joint for at least five years before the clinical worsening of osteoarthritis in that joint
having necrosis of the subchondral bone near the affected joint, including that from dysbaric osteonecrosis, before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the upper limb only, performing any combination of repetitive activities or tasks involving repeated or sustained pinch grip or hand/power grip, for an average of at least 30 hours per week, for a cumulative period of at least ten years within a continuous period of 15 years, before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the hand, wrist or elbow joint only, using a hand-held, vibrating percussive tool or object on more days than not, for a cumulative period of at least ten years, within the 25 years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: having: (i) an amputation involving either leg; or (ii) an asymmetric gait; for at least five years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb only: lifting loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 150 000 kilograms within any ten year period before the clinical worsening of osteoarthritis in that joint; and (ii) where the clinical worsening of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: carrying loads of at least 20 kilograms while bearing weight through the affected joint: (i) to a cumulative total of at least 3 800 hours within any ten year period before the clinical worsening of osteoarthritis in that joint; and (ii) where the clinical worsening of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a joint of the lower limb only: ascending or descending at least 150 stairs or rungs of a ladder per day, on more days than not, for a continuous period of at least five years, within the 25 years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: being overweight for at least ten years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for males, having a waist circumference exceeding 102 centimetres for at least ten years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a joint of the lower limb or hand joint only: for females, having a waist circumference exceeding 88 centimetres for at least ten years before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a hip or knee joint only: (a) kneeling or squatting for a cumulative period of at least one hour per day, on more days than not, for a continuous period of at two years before the clinical worsening of osteoarthritis in that joint; and (b) where the clinical worsening of osteoarthritis in that joint occurs within the 25 years following that period
for osteoarthritis of a knee joint only, having internal derangement of the affected joint before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of the patello-femoral joint only, having chondromalacia patella before the clinical worsening of osteoarthritis in that joint
having a disorder associated with loss of pain sensation or proprioception involving the affected joint before the clinical worsening of osteoarthritis in that joint
having Paget's disease of bone of the affected joint before the clinical worsening of osteoarthritis in that joint
having acromegaly before the clinical worsening of osteoarthritis in that joint
having joint instability or dislocation of the affected joint, at least one year before the clinical worsening of osteoarthritis in that joint
for osteoarthritis of a hip joint only, having femoroacetabular impingement syndrome of the affected joint, before the clinical worsening of osteoarthritis in that joint
inability to obtain appropriate clinical management for osteoarthritis

After the condition arose, it was worsened during your service. Reactive arthritis of the left knee relapsed with a further effusion on 19 November 2008 and was present before the worsening documented on 22 September 2010. The bacterial septic arthritis of the left knee in October 1991, and the second infection after captivity in March 1993, both preceded the worsening on 22 September 2010. The 1991 lateral tibial plateau fracture and the 1999 osteochondral fracture of the lateral femoral condyle both involved the articular surface of the left knee and preceded the worsening on 22 September 2010. The fall on 9 June 2010 caused a haemarthrosis, with 45 mL of blood aspirated at the role 2 facility, adding to the haemarthroses of 1991 and 1999, all before the worsening on 22 September 2010. Gout persisted, with an acute attack of the left knee confirmed on aspiration on 7 April 2009, before the worsening on 22 September 2010. The 25 years before the worsening run from 22 September 1985 to 22 September 2010. MRI on 22 September 2010 showed a fresh chondral flap tear of the lateral femoral condyle from the fall of 9 June 2010, within the 25 years before the worsening. The fall of 9 June 2010 caused an acute tear of the posterior horn of the left medial meniscus, shown on MRI on 22 September 2010, within the 25 years before the worsening. The frostbite of the left knee on 12 January 2006 preceded the worsening on 22 September 2010. The 7-degree valgus malunion of the lateral tibial plateau persisted for more than 18 years before the worsening on 22 September 2010. Subchondral osteonecrosis of the lateral femoral condyle, first shown in 2002, had progressed with early collapse on MRI on 22 September 2010. The power grip and pinch grip work of 1984 to 2002 amounted to more than ten cumulative years within a continuous 15-year period before the worsening. The use of pneumatic percussive tools on more days than not from 1984 to 2002 lies within the 25 years before the worsening, which run from 22 September 1985 to 22 September 2010, and amounts to more than ten cumulative years. The asymmetric gait present since 1992 persisted for more than 18 years before the worsening on 22 September 2010. The lifting of more than 1.5 million kg between 1990 and 1999 was followed by the worsening on 22 September 2010, within the 25 years following that period. The more than 4 000 hours of load carriage between 1990 and 1999 were followed by the worsening within the 25 years following that period. The ten continuous years of ladder and stair climbing from 1990 to 2000 fall within the 25 years before the worsening. Your BMI remained above 25, and was 31.6 on 22 September 2010, throughout the ten years before the worsening. Your waist circumference exceeded 102 cm, measured at 111 cm in 2010, throughout the ten years before the worsening. Your waist circumference exceeded 88 cm throughout the ten years before the worsening, from 22 September 2000 to 22 September 2010. The 18 continuous years of kneeling and squatting from 1984 to 2002 were followed by the worsening on 22 September 2010, within the 25 years following that period. Internal derangement of the left knee, with cruciate deficiency and the new medial meniscal tear of 9 June 2010, preceded the worsening. Chondromalacia patellae of the left knee, present since 1986, preceded the worsening. The solvent-related sensory neuropathy with loss of proprioception at the knees persisted before the worsening on 22 September 2010. Paget's disease of the left proximal tibia remained active, with a raised alkaline phosphatase in 2009, before the worsening. Acromegaly, treated surgically in 2002, preceded the worsening. Left knee instability from cruciate deficiency persisted, and the knee gave way to cause the fall of 9 June 2010, more than one year after the instability began and before the worsening. Left femoroacetabular impingement syndrome, diagnosed in 2004, preceded the worsening. After diagnosis on 27 June 2006 you were referred to an orthopaedic surgeon but was deployed before review, and on warlike service in Afghanistan in 2010 no orthopaedic care, MRI or physiotherapy was available after the fall of 9 June 2010; you continued recovery duties in a brace for 11 weeks.

This has then led to further investigations and the diagnosis of your condition of Osteoarthritis (Worsening). I have accepted your condition of Osteoarthritis (Worsening).

Having considered your service records and the available medical evidence, I am satisfied the SOP is met and that the worsening of this condition is related to your peacetime service.

I have therefore accepted that the worsening of this condition is related to your service with effect from 22 September 2010.

Left Knee - Osteoarthritis — example determination letter

See the letter exactly as it is delivered

Reference Determination Content

Left Knee - Osteoarthritis

Evidence

Your service

Left Knee - Osteoarthritis

Left Knee - Osteoarthritis (Worsening)

Evidence

Your service

Left Knee - Osteoarthritis (Worsening)