Risk Factors for Radiographic Tibiofemoral Knee Osteoarthritis: The Wuchuan Osteoarthritis Study

Table 1

Characteristics of the Wuchuan County study participants.

	Men	Women
No.	505	520
Age (years ± SD)	57.3±8.3	55.6±7.5
Weight (kg ± SD)	59.7±8.9	56.1±9.5
BMI (kg/m^2 ± SD)	21.6±2.7	23.3±3.5
Main occupation farming (%)	94	88
Still working (%)	90	81