Table 3.

Frequency of Risk Factors Identified at Baseline among Women with Previous and Incident^* Fractures (Rates per 1000 Women)

Risk Factor	Previous Fracture				Incident Fracture (within 2 Years of Basline)
	Group 1: Obese (n = 2274)	Group 2: Nonobese (n = 7401)	Group 3: Underweight (n = 220)	P Value†	Group 1: Obese (n = 633)	Group 2: Nonobese (n = 2170)	Group 3: Underweight (n = 53)	P Value†
Previous fracture					416	390	566	2 vs 3
Maternal hip fracture	156	164	162		141	177	159
Current estrogen use	55.9	73.6	77.6	1 vs 2	57.1	73.4	94.3
Early menopause	194	127	128	1 vs 2	200	139	98	1 vs 2
Current cortisone use	49.3	38.2	51.2		48.2	49.6	19.2
Weight loss ≥10 lb	113	103	207	1 vs 3, 2 vs 3	132	117	208
Current smoker	56.6	79.6	152	1 vs 3, 2 vs 3	86.3	92.3	173
Alcohol >20 units/week	1.3	5.2	0.0	1 vs 2	3.2	8.3	0.0
Arms assist	605	359	347	1 vs 2, 1 vs 3	595	348	327	1 vs 2, 1 vs 3
Fair/poor general health	342	240	347	1 vs 2, 2 vs 3	345	257	321	1 vs 2
Falls
1 in past 2 years	270	265	298		256	259	358
≥ 2 in past 2 years	242	187	234	1 vs 2	308	211	264	1 vs 2

^*Incident fracture is defined as a fracture of at least one of the following bones: clavicle, upper arm, wrist, spine, rib, hip, pelvis, ankle, upper leg, lower leg, hand, foot, elbow, knee, or shoulder.

^†We performed pairwise comparisons among the 3 groups, and report any results where Fisher’s exact test P ≤.017 (for example. 1 vs 2 means the difference between group 1 [obese] and group 2 [nonobese] is statisticallv significant at alpha = .017 level).