Table 3 Multivariate poisson regression model of risk factors for injury among 1493 Keokuk County Rural Health Study cohort members aged 18 years and older stratified by antidepressant medication use.

No depressive medication (n = 1330)			Depressive medication (n = 125)
Risk factor	Injury frequency	RR (95% CI)	Risk factor	Injury frequency	RR (95% CI)
Depressive symptoms	210	1.43 (1.09–1.88)	Depressive symptoms	49	1.31 (0.76–2.26)
Males	615	1.46 (1.18–1.79)	Males	40	0.73 (0.41–1.29)
Prior injury	274	1.29 (1.00–1.65)	Prior injury	31	1.70 (0.95–3.06)
Less than 7 hours of sleep	405	1.20 (0.96–1.51)	Less than 7 hours of sleep	28	1.27 (0.70–2.30)
Income less than $20,000 a year	147	1.51 (1.10–2.08)	Income less than $20,000 a year	23	0.74 (0.35–1.56)