Table 1.

Participant characteristics

	Men (N = 1260)		Women (N = 6489)		p value
	n	%	n	%
Site					<0.001
University of Iowa	268	21.3	1417	21.8
University of Alabama Birmingham	232	18.4	2848	43.9
Kaiser Permanente	760	60.3	2224	34.3
Age					<0.001
<65	327	26.0	2681	41.3
65–74	607	48.2	2758	42.5
≥ 75	326	25.9	1050	16.2
Race					0.0076
White	1011	80.2	4924	75.9
Black	219	17.4	1437	22.1
Other	30	2.4	128	2.0
Educational attainment					0.0010
Some high school	42	3.4	259	4.0
Completed high school	264	21.4	1391	21.6
Some college	356	28.9	2203	34.2
Completed college	263	21.3	1284	19.9
Graduate school	308	25.0	1315	20.4
Self-reported health status					<0.001
Excellent	141	11.2	798	12.3
Very good	361	28.8	2172	33.5
Good	485	38.7	2331	36.0
Fair	193	15.4	944	14.6
Poor	74	5.9	235	3.6
Bone health
Prior bone density test (i.e., DXA)	343	27.3	4853	74.8	<0.001
Prior fracture	288	23.0	1806	27.9	0.0002
History of osteoporosis	154	12.3	1549	24.1	<0.001
History of osteopenia	100	7.9	1516	23.4	<0.001
On medication at baseline	84	6.7	1011	15.6	<0.001
On medication in the past	172	13.7	2768	42.7	<0.001