Table 1. Baseline characteristics of the post-menopausal females studied.

Covariate	Whole population(n=729)	Age <65(n=469)	Age ≥65(n=260)	Unpaired t-test p-value(age <65 vs age ≥65)
Age (years)	62.2±8.47	56.7±5.4	71.6±4.3	0.001
Age at menopause (years)	48.7±4.7	48.7±4.4	48.7±5.3	0.972
Height (cm)	159.6±6.2	160.1±6.2	158.8±6	0.006
Weight (kg)	62.3±9.9	62.0±10.1	62.8±9.7	0.274
BMI (kg m−2)	24.8±7.9	24.2±3.5	24.9±3.5	0.007
FNBMD (g cm−2)	0.676±0.102	0.701±0.100	0.632±0.091	0.001
NSA (degrees)	123.6±5.5	123.9±5.4	123.0±5.6	0.035
HAL (cm)	10.6±7.1	10.6±0.7	10.7±0.7	0.026
FND (cm)	3.3±0.2	3.2±0.2	3.3±0.2	0.001
FSD (cm)	3.3±0.2	3.3±0.2	3.4±0.2	0.001

BMI, body mass index; FNBMD, femoral neck bone mineral density; FND, femoral neck diameter; FSD, femoral shaft diameter; HAL, hip axis length; NSA, neck–shaft angle.