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. Author manuscript; available in PMC: 2009 Oct 6.
Published in final edited form as: Arthritis Rheum. 2009 May 15;61(5):641–647. doi: 10.1002/art.24464

Table 2. Prevalence of tibio-femoral knee OA in Wuchuan County, Inner Mongolia.

Men Women
Age N Radiographic
n (%)		 Symptomatic
n (%)		 N Radiographic
n (%)		 Symptomatic
n (%)
50-59* 327 13 (4%) 9 (3%) 381 48 (13%) 33 (9%)
60-69 111 18 (16%) 14 (13%) 90 36 (40%) 26 (29%)
70+ 67 22 (33%) 12 (18%) 49 18 (37%) 15 (31%)
All 505 53 (10%) 35 (7%) 520 102 (20%) 74 (14%)
*

Includes 50 participants aged 48 and 49 at the time of survey.