Table 2. Concentration Indices for accessing safe childbirth care with household ranked by socioeconomic in Tanzania DHS, 2004–2016.

	2004	2010	2016
	Concentration Index [95% CI]	Concentration Index [95% CI]	Concentration Index [95% CI]
Institutional delivery	0.195 [0.162–0.228]	0.211 [0.184–0.237]	0.175 [0.155–0.195]
Skilled birth attendance	0.204 [0.173–0.234]	0.213 [0.186–0.240]	0.171 [0.152–0.190]