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. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Osteoarthritis Cartilage. 2008 Jun 20;17(1):43–48. doi: 10.1016/j.joca.2008.05.004

Table 1.

Characteristics of BLSA Participants Represented at the Time of Initial and Classifying X-ray

Initial X-ray (1984-1991) Classifying X-ray (1994-1996)
OA (n=21) Controls (n=61) OA (n=19) Controls (n=66)
Age (mean ± SD years) 58.0±15.2 52.3±14.4 69.4±15.7 65.7±14.2
Age Group
 22-44 3 16 1 6
 45-70 12 36 6 31
 71-92 6 9 12 29
Men:Women 9:12 25:36 8:11 29:38
Body Mass Index (kg/m2) 25.4 ± 3.07 25.6 ± 4.4 26.7 ± 4.8 26.9 ± 4.8