Table 1

Maternal mortality estimate using the sisterhood method for the reference period 1998 in rural Bonke, Gamo Gofa, south-west Ethiopia, 2011
Age of respondents No. of respondents sisters survived age ≥ 15 yrs Dead from all causes Maternal deaths (r) adjustment factor ( f) Sisters units exposed to risk (β) Lifetime risk (Q )
k e C r f β = ef Q=r/ β
15-19 2443 6471* 428 240 0.107 693 0.346
20-24 1625 4306* 370 152 0.206 887 0.172
25-29 1450 3889 375 152 0.343 1334 0.114
30-34 1235 3135 358 103 0.503 1576 0.065
35-39 812 2201 331 89 0.664 1461 0.061
40-44 523 1397 255 52 0.802 1120 0.046
45-49 415 1074 225 31 0.900 997 0.031
Total 8503 22473 2342 819 8068 0.102

*inflated number of sisters obtained by multiplying the average number of sisters survived for respondents aged 25–49 (which is 2.65 in this data) by the number of respondents in the younger age groups (age 15–19 and 20–24). Originally reported sisters by the young group were: 5425 for aged 15–19 and 4230 for 20–24 years old respondents.

Yaya and Lindtjørn

Yaya and Lindtjørn BMC Pregnancy and Childbirth 2012 12:136   doi:10.1186/1471-2393-12-136

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