Predicting prognosis in amyotrophic lateral sclerosis: a simple algorithm

Table 2 This table summarises the Kaplan–Meier estimated median survival time for the three ALS risk groups in the Irish training and test cohorts and the Italian cohort

	High-risk group			Medium-risk group			Low-risk group			Log-rank p value
	N	Median survival time	95 % CI	N	Median survival time	95 % CI	N	Median survival time	95 % CI	Log-rank p value
Training set	26	22.0	16.0–28.0	64	34.0	30.5–37.5	27	63.0	50.1–75.9	<0.0001
Irish test set	14	11.0	7.3–14.7	51	33.0	28.6–37.4	21	73.0	48.0–98.0	<0.0001
Italian cohort	18	22.0	19.2–24.8	72	35.0	26.9–43.1	32	91.0	63.6–118.4	<0.0001