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. Author manuscript; available in PMC: 2012 Jul 30.
Published in final edited form as: Ann Intern Med. 2011 Dec 6;155(11):725–732. doi: 10.1059/0003-4819-155-11-201112060-00004

Appendix Table 1.

Number of Men and Women by Study, Time Period, Cohort/Outcome

STUDY MEN WOMEN
NHANES Time Period 1974–75 1976–80 1988–94 1974–75 1976–80 1988–94
White/Mexican American 588 1829 1368 613 2070 1429
African American 91 208 447 90 235 438
NHANES Time Period 1999–2000 2001–02 2003–04 1999–2000 2001–02 2003–04
White/Mexican American 427 387 439 422 389 422
African American 108 117 94 109 118 99
FOA Time Period 1983–85 1992–951 2002–052 1983–852 1992–953 2002–052
Radiographic Knee OA 364 Original 371 Original 115 Community 537 Original 690 Original 140 Community
31 Offspring 181 Offspring 34 Offspring 234 Offspring
Knee Pain/Symptomatic OA 361 Original 359 Original 115 Community 524 Original 631 Original 135 Community
181 Offspring 233 Offspring

Number of participants who dropped out of the respective BMI-adjusted radiographic and knee pain/symptomatic osteoarthritis analyses due to missing BMI data:

1

12 and 7;

2

1 and 1;

3

39 and 8;

Abbreviations: NHANES-National Health and Nutrition Examination Surveys; FOA-Framingham Osteoarthritis Study; BMI-body mass index; OA-osteoarthritis