Table 2. Characteristics of included individuals from the OAI baseline cohort (n = 3330).

Characteristics	Mean ± SD* or n (%)
Age, years (mean ± SD)	61.4 ± 9.1
BMI, kg/m2 (mean ± SD)	28.4 ± 4.7
Women	1910 (57.4%)
White	2866 (86.1%)
Annual income > $50,000	2069 (64.0%)
Currently employed	2073 (62.4%)
Incidence cohort	2411 (72.4%)
Progression cohort	895 (26.9%)
Healthy cohort	24 (0.7%)

*SD = standard deviation.