Table 2

Prevalence of symptomatic radiographic knee osteoarthritis in older adults

Study location Sample Case definition Overall prevalence estimate (%)
Bristol, England10 M + F aged over 55 registered at one general practice (n=513)Knee pain + evidence of OA (Ahlback)13
Nottingham, England20 M + F aged 40–79 registered at two general practices (n=459)Knee pain + grade 1+ osteophytes19
Knee pain + grade 2+ osteophytes11