. Author manuscript; available in PMC: 2009 Jun 15.

Published in final edited form as: Am J Cardiol. 2008 Apr 8;101(12):1772–1776. doi: 10.1016/j.amjcard.2008.02.071

Table 2.

History of hypertension and hospitalization due to stroke, before and after propensity score matching

Outcomes	Rate/10,000 person-years (events/total follow up years)		Absolute increase in rate/10000 person-years^*	Increase in the number of stroke hospitalizations in the US^^	Hazard ratio (95% confidence interval)	P value
Outcomes	No history of hypertension	History of hypertension	Absolute increase in rate/10000 person-years^*		Hazard ratio (95% confidence interval)	P value
Before matching	(n =4,114)	(n =3,674)
Hospitalization due to stroke	126 (151/11,978)	207 (215/10,391)	+ 80	+ 40,422 (103,454 – 63,032)	1.63 (1.33–2.01)	<0.0001
After matching	(n =2,386)	(n =2,386)
Hospitalization due to stroke	129 (90/6,996)	178 (121/6,789)	+ 49	+ 24,792 (89,115 – 64,322)	1.52 (1.11–2.08)	0.010

Absolute rate differences were calculated by subtracting the rates of hospitalizations due to stroke in the no hypertension group from the rate in the hypertension group (before values were rounded).

Number of hospitalizations for stroke for an estimated 5 million heart failure patients in the US was calculated by subtracting the number of hospitalizations due to stroke in the no hypertension group from that in the hypertension group (before values were rounded).