Table 3.

Risk ratios of mortality because of second primary malignancy and all-cause mortality, in comparison to Surveillance, Epidemiology, and End Results normative data*

Length of follow-up	Observed	Expected	RR (95% CI)
Death because of second primary malignancy
≤14 y	32	9.6	3.34 (2.29 to 4.72)
14–23 y	12	6.3	1.89 (0.98 to 3.31)
>23 y	8	2.3	3.54 (1.53 to 6.98)
Total	52	18.2	2.86 (2.14 to 3.75)
Death because of all causes among men
≤14 y	101	21.3	4.75 (3.87 to 5.77)
14–23 y	29	9.9	2.93 (1.96 to 4.21)
>23 y	6	2.9	2.05 (0.75 to 4.46)
Total	136	34.1	3.99 (3.35 to 4.72)
Death because of all causes among women
≤14 y	67	9.4	7.11 (5.51 to 9.03)
14–23 y	17	8.2	2.07 (1.21 to 3.32)
>23 y	7	3.4	2.04 (0.82 to 4.21)
Total	91	21.0	4.32 (3.48 to 5.31)
Death because of all causes among all patients
≤14 y	168	30.7	5.48 (4.68 to 6.37)
14–23 y	46	18.1	2.54 (1.86 to 3.39)
>23 y	13	6.4	2.05 (1.09 to 3.50)
Total	227	55.1	4.12 (3.60 to 4.69)

* CI = confidence interval; RR = risk ratio.