Table 6.

 Multivariate adjusted models of risk factors for rib fracture including bone mineral density (BMD) in variable selection in 5879 men aged 65 and over (MrOS Study). Values are hazard ratios (95% CI)

	Model 1: Including BMD in variable selection	Model 2: Excluding BMD in variable selection
Total hip BMD per SD decrease	1.43 (1.19 to 1.73)	NA
Weight per SD decrease	*	1.23 (1.01 to 1.49)
Age ≥80 years	1.59 (1.05 to 2.39)	1.55 (1.02 to 2.35)
Difficulty with 5 IADLs (score)	1.15 (1.05 to 1.25)	1.16 (1.06 to 1.27)
Rib fracture at any age	2.71 (1.86 to 3.95)	3.01 (2.07 to 4.38)
Arthritis	0.59 (0.41 to 0.85)	0.57 (0.40 to 0.83)
Parkinson’s disease	*	3.33 (1.05 to 10.5)
History of cancer	*	1.45 (1.01 to 2.09)

IADLs=instrumental activities of daily living; NA=not applicable.

*In model 1, weight and history of Parkinson’s disease and cancer were not selected.