Association of the client-provider ratio with the risk of maternal mortality in referral hospitals: a multi-site study in Nigeria

Table 2 Unadjusted Incidence Rate Ratios (and 95% confidence intervals) from Poisson regression analyses examining association between number of providers and number of maternal deaths

Type of provider	IRR	CI
All Providers	0.999**	0.999–1.000
All Doctors	0.998***	0.998–0.999
All Nurses & Midwives	0.999	0.999–1.000
Doctors in Obstetrics & Gynaecology Department	0.986***	0.980–0.992
Specialist Obstetricians	0.985*	0.973–0.998
Trained Midwives	0.998***	0.998–0.999
Doctors in Obstetrics & Gynaecology Department & Specialists Obstetricians	0.992***	0.988–0.996
All maternal providers	0.998***	0.998–0.999

Note: Significance-level (two-tailed): * p < .05, **p < .01, ***p < .001. IRR – Incidence Rate Ratio; CI – 95% Confidence Interval

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