Table 1

Final negative binomial estimates for the intervention outcomes in the separate ITS analysis

	Public facilities
	Normal delivery		Caesarean section		ANC		PNC
	Estimate (95% CI)	P value	Estimate (95% CI)	P value	Estimate (95% CI)	P value	Estimate (95% CI)	P value
Slope change prepolicy	1.005 (0.997 to 1.014)	0.234	1.022 (1.013 to 1.030)	0.000	1.001 (0.992 to 1.009)	0.899	0.989 (0.979 to 0.999)	0.026
Effect of free maternity policy
Level change	1.196 (1.113 to 1.286)	0.000	1.289 (1.207 to 1.377)	0.000	1.031 (0.966 to 1.101)	0.359	0.856 (0.792 to 0.926)	0.000
Trend change	1.002 (0.993 to 1.011)	0.725	0.986 (0.978 to 0.994)	0.001	1.003 (0.995 to 1.012)	0.415	1.016 (1.006 to 1.026)	0.002
Effect of Linda Mama policy
Level change	1.129 (0.876 to 1.456)	0.349	1.000 (0.795 to 1.256	0.997	1.223 (0.871 to 1.718)	0.246	0.619 (0.412 to 0.929)	0.021
Trend change	1.001 (0.991 to 1.010)	0.903	0.989 (0.980 to 0.998)	0.016	1.002 (0.992 to 1.012)	0.714	1.023 (1.011 to 1.035)	0.000
Private and faith-based facilities
Slope change prepolicy	1.003 (0.990 to 1.016)	0.667	0.992 (0.980 to 1.004)	0.196	1.002 (0.983 to 1.022)	0.803	1.011 (0.981 to 1.043)	0.477
Effect of free maternity policy
Level change	1.020 (0.916 to 1.137)	0.717	0.854 (0.773 to 0.944)	0.002	0.850 (0.729 to 0.991)	0.038	0.962 (0.753 to 1.229)	0.755
Trend change	0.992 (0.979 to 1.005)	0.233	1.013 (1.000 to 1.025)	0.044	1.002 (0.983 to 1.021)	0.855	0.992 (0.961 to 1.023)	0.591
Effect of Linda Mama policy
Level change	0.681 (0.494 to 0.938)	0.019	0.603 (0.454 to 0.801)	0.000	0.831 (0.374 to 1.848)	0.65	0.620 (0.171 to 2.244)	0.466
Trend change	1.008 (0.993 to 1.022)	0.298	1.024 (1.010 to 1.037)	0.000	1.006 (0.983 to 1.029)	0.626	1.004 (0.968 to 1.041)	0.847

All segmented regression used a log link function with negative binomial distribution and p values are derived from z tests. Values in bold represent a strong evidence of an effect at a 0.05 level of significance.
ANC, antenatal care; ITS, interrupted time series; PNC, postnatal care.