TABLE I.

Baseline Data for Patients Evaluated^*

	No. for Whom Data Available	Value
Age at 2nd examination†(yr)	8049	73 ± 5
Total hip bone mineral density†(g/cm2)	8049	0.76 ± 0.13
Calcaneal bone mineral density†(g/cm2)	8024	0.41 ± 0.09
Height at age of 25 yr†‡(cm)	7904	163 ± 6
Depth perception (per 10 times standard deviation of 4 Howard-Dolman optical distance scores)†(cm)	7820	2.13 ± 2.49
Weight gain since age of 25 yr†(kg)	7642	10.2 ± 10.3
Maternal history of hip fracture after age of 50 yr‡§	6153	13
Estrogen use§	8045	15
Use of long-acting benzodiazepines at baseline‡§	8008	9
Self-reported health status (on a scale of 1-5)†	8049	1.84 ± 0.70
Walking for exercise§	8049	52
Standing or walking <4 hr/day§	8039	9
Use of arms to rise from chair§	8045	4
History of falls§	8048	31

^*All measures were recorded at the second examination, except where indicated.

^†The values are given as the mean and standard deviation.

^‡The value was unavailable at the second examination, and the value at the first examination was used.

^§The values are given as the percentage.