Table 2.

All cause hospitalizations among patients diagnosed with ischemic stroke according to time since index stroke

	At Risk		All Cause Hospitalization
Time Period	N*	PY**	Patients	Hosp†	%‡	Freq§	Hazard#	Total Rate°
Month 1	18,695	1,429	2,338	2,440	12.5	1.04	1.64	1.71
Month 2	16,821	1,359	1,375	1,455	8.2	1.06	1.01	1.07
Months 3–6	16,319	5,274	3,325	4,386	20.4	0.44	0.63	0.83
Months 7–12	15,361	7,457	3,436	4,870	22.4	0.23	0.46	0.65
Year 2	14,436	13,642	4,654	7,935	32.2	0.14	0.34	0.58
Year 3	12,917	12,265	3,992	6,903	30.9	0.14	0.33	0.56
Year 4	11,628	11,081	3,611	5,948	31.1	0.14	0.33	0.54
Year 5	10,514	9,997	3,269	5,351	31.1	0.14	0.33	0.54

*N=number surviving to beginning of each time period

**PY=person years accumulated by patients during each period

^†Hospitalization count in each period

^‡% gives the proportion of patients hospitalized

^§Frequency expressed as hospitalizations per patient hospitalized (per month)

^#Hazard expressed as patients hospitalized per patient year

°Total rate expressed as hospitalizations per patient year