Table 2. Mortality rates stratified by age at censoring or death.

Age (group)	Number of patients	Observation (yrs)	Number of Deaths	Mortality rate per 100 PYO (95%CI)
<5 years	243	303.0	22	7.3 (4.8–11.0)
5–19 years	1,053	3,325.6	47	1.4 (1.1–1.9)
>20 years	267	849.4	15	1.8 (1.1–2.9)
Total	1,564	4,482	85	1.9 (1.5–2.9)

Mortality rates for 1,564 SCA patients enrolled and with more than one clinic visit. The rates take into account date of birth and date of recruitment into the study.