Table 2.

Risk of pneumonia after stroke among patients in the BZD and non-BZD cohorts

	BZD use
	Yes	No
Patient numbers	3758	3758
Pneumonia cases	1027	478
Person-years	19 680.1	14 663.8
Incidence rate*	52.2	32.6
Univariate model
Crude HR (95% CI)	1.95 (1.75 to 2.17)	1 (ref)
P value	<0.001
Multivariate model†
Adjusted HR (95% CI)	2.21 (1.97 to 2.48)	1 (ref.)
P value	<0.001

*Per 1000 person-years.

†Multivariate Cox proportional hazard regression model, adjusting for all baseline characteristics (listed in table 1) and competing mortality.

BZD, benzodiazepine.