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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

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

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