Fig. 4.

Estimates of adult survival between ages 15 and 59 according to DSS and SSH data. The survival curves represent the cumulative probability of death for adult women (i.e., having ever reached age 15) who were members of the reference sibships included in the study. Respondents were excluded from these calculations. In the HDSS estimates, observations of sisters lost to follow-up were censored at the time of exit from the HDSS population. In SSH estimates, these observations were censored at the time of the survey given that the respondent reported the vital status of siblings at the time of survey. Similar results were obtained when SSH data on siblings lost to HDSS follow-up were censored at the time of exit from the HDSS rather than at the time of the survey. In this figure, missing ages were not imputed in the SSH data. In a robustness test, however, missing data on current age/age at death in the SSH data were imputed using the same procedure adopted during the DHS. Using this approach, we obtained similar results to the ones presented here. The age at death of four siblings could not be imputed because of missing data on both the age and date of death.