Table III Estimate of mean survival...

Table III

Estimate of mean survival durations in 12-year follow-up using the extrapolation method based on the first four years of follow-up data compared using the Kaplan–Meier (KM) estimates based on the full 12 years of follow-up data

		12-Year follow-up KM estimate		Estimate using extrapolation based on the first 4 years of follow-up
	Cohort size	Mean	SE	Mean	SE	Relative bias (%)	Censoring rate^a (%)
All patients with stroke	2,103	6.76	0.07	6.45	0.07	−4.59	41.61
Ischemic stroke	1,518	7.08	0.08	6.85	0.07	−3.18	43.61
Intracerebral hemorrhage	585	5.84	0.13	5.71	0.11	−2.27	36.41

		12-Year follow-up KM estimate		Estimate using extrapolation based on the first 4 years of follow-up
	Cohort size	Mean	SE	Mean	SE	Relative bias (%)	Censoring rate^a (%)
All patients with stroke	2,103	6.76	0.07	6.45	0.07	−4.59	41.61
Ischemic stroke	1,518	7.08	0.08	6.85	0.07	−3.18	43.61
Intracerebral hemorrhage	585	5.84	0.13	5.71	0.11	−2.27	36.41

Note: ^aThe censoring rates were computed at the end of the first four years of follow-up

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