Table 3.

Number of deaths (n) and SMRs among the NF1 patients by age group

Age, years	Person- Years	Observed Deaths	Expected Deaths	SMR	95%CI
<10	11 905.5	4	4.2	0.95	0.3-2.4
10 to <20	8875	11	2.1	5.2	2.6-9.3
20 to <40	10 395	31	7.6	4.1	2.8-5.8
40 to <60	3657.5	11	11.6	0.9	0.5-1.7
≥60	480	10	7.7	1.3	0.6-2.4

SMR, standardized mortality ratio (observed deaths/expected deaths); 95%CI, 95% confidence interval