Table 1.

Characteristics of the patient sample

Variable	Obs	Mean	SD	Min	Max
Age (yrs)	1593	69.14	9.81	25.64	100.04
Body Mass Index	1455	29.65	4.67	14.17	50.22
EQ-5D	1520	0.29	0.35	−0.594	1
WOMAC pain scale	1660	11.37	3.78	0	20
WOMAC stiffness scale	1657	4.70	1.95	0	8
WOMAC function scale	1664	43.85	11.83	0	68
Proportion - Osteoporosis of the hip	1768	0.61	0.49
Proportion - Male	1764	0.39	0.49