All variables included in the compiled dataset were checked and recoded to ensure standardised response categories across surveys.
Although DHS questionnaires are standardised, changes may be made to questions or response codes in successive surveys (for example, the response codes for individual contraceptive methods currently used is different in different rounds).
Population density is much lower in the north and south-east.
The health system in Senegal follows a hierarchical model, with each of the 14 regional medical offices responsible for overseeing health districts in the region.
We compiled six DHSs conducted in Senegal (1992/93, 1997, 2005, 2010/11, 2012/13, and 2014) in a single database.
The 1999 survey was excluded because data collected did not follow the standard DHS model.
Recent increases in family planning (FP) use have been reported among women of reproductive age in union (WRAU) in Senegal.
In response, the Senegalese Ministry of Health launched an ambitious National Family Planning Action Plan in 2012, announcing a national target of 27% MCPR by 2015 among women of reproductive age in union (WRAU) – from 11% MCPR in 2011 – through increased availability of FP services and commodities, as well as a broad communication and advocacy campaign.Adolescents and unmarried women may face other challenges in accessing FP services, in addition to potential geographical and financial restrictions.In Senegal, strong norms exist against premarital sex, and although there are no legal restrictions to providing FP to young or single women, providers often promote abstinence until marriage.The 0.4% of women with missing information on unmet need were considered not to have an unmet need. We defined three mutually exclusive harder-to-reach groups (Fig.1): adolescents (aged 15–19), unmarried women (never-married and separated/widowed women aged over 20), and rural poor women (married women aged 20 and older living in rural areas whose household wealth score fell in the poorest quintile).