Table I.

Demographics of the two samples used in the analysis

	2D hip shape sample	3D hip shape sample
Demographics	Mean [Range]	Mean [Range]
Age (years)	72.8 [64–93]	73.9 [65–92]
Weight (kg)	83.6 [48.5–144.1]	83.2 [55.3–128.9]
Height (cm)	174.4 [151.8–198.9]	174.4 [147.2–197.7]
Race	Prevalence [%]	Prevalence [%]
White	3,704 [90.4]	454 [88.2]
African American	130 [3.2]	19 [3.7]
Asian	136 [3.3]	16 [3.1]
Hispanic	76 [1.9]	18 [3.5]
Other	52 [1.3]	8 [1.6]
Site of investigation
Birmingham	674 [16.5]	77 [15.0]
Minneapolis	742 [18.1]	84 [16.3]
Palo Alto	615 [15.0]	96 [18.6]
Pittsburgh	667 [16.3]	89 [17.3]
Portland	671 [16.4]	88 [17.1]
San Diego	729 [17.8]	81 [15.7]
Radiographic OA
Croft score <2	3,810 [93.0]	487 [94.6]
Croft score ≥2	288 [7.0]	28 [5.4]
Total	4,098	515