Table 3.

Risk Ratios (RRs) for Falls in Relation to Back Pain According to Baseline Age, Fall History, and Hip Pain

Strata	≥2 Falls		p Interaction	Any Fall		p Interaction
	No Back Pain	Any Back Pain		No Back Pain	Any Back Pain
	Multivariable RR (95% CI)*			Multivariable RR (95% CI)†
Age <75 years	1.0 (ref.)	1.7 (1.4, 2.2)		1.0 (ref.)	1.3 (1.1, 2.4)
Age ≥75 years	1.0 (ref.)	1.2 (0.9, 1.6)	.02	1.0 (ref.)	1.2 (1.0, 1.3)	.36
No falls in prior year	1.0 (ref.)	1.5 (1.2, 1.9)		1.0 (ref.)	1.2 (1.1, 1.4)
Fell in prior year	1.0 (ref.)	1.3 (1.1, 1.7)	.47	1.0 (ref.)	1.2 (1.0, 1.3)	.89
No hip pain in prior year	1.0 (ref.)	1.5 (1.3, 1.9)		1.0 (ref.)	1.2 (1.1, 1.4)
Hip pain in prior year	1.0 (ref.)	1.3 (1.0, 1.9)	.54	1.0 (ref.)	1.1 (1.0, 1.4)	.54

*Adjusted for age, education, cigarette smoking, fainting episodes, hip pain, history of stroke, and geriatric depression scale (GDS). Age was not included in models within age strata; hip pain was not included in models within hip pain strata.

^†Adjusted for age, education, cigarette smoking, fainting episodes, hip pain, prevalent vertebral fracture, and GDS. Age was not included in models within age strata; hip pain was not included in models within hip pain strata.