The Bali Indirect Maternal Mortality Study.

The Bali Indirect Maternal Mortality Study (BIMMS) was conducted in Bali Province, Indonesia in 1991. The objective of the study was to evaluate the indirect sisterhood method for estimating maternal mortality, using a prospective (direct) community-based survey undertaken from 1980 to 1982 among women of reproductive age (Reproductive Age Mortality Survey, or RAMOS) as a comparison. The BIMMS maternal mortality ratio was 331 per 100,000 live births adjusted for 1982. This ratio is similar to the RAMOS one prior to its adjustment, of 359 per 100,000 live births. The sisterhood method was faster, cheaper, and appears to be as accurate as direct methods.