On Zero-Inflated Hierarchical Poisson Models with Application to Maternal Mortality Data

Table 3

Maternal mortality data. Parameter estimates and standard errors (s.e.) for the zero-inflated Poisson GLMM (ZIPG).

	Estimates (s.e.)	Pr (>│z│)
ZIPG
Conditional model
Intercept	2.3553 (0.3884)	<0.001
Referral in	0.0010 (0.0003)	<0.001
Referral out	−0.0143 (0.0030)	<0.001
Malaria	−0.0008 (0.0005)	0.150
HIV/AIDS	−0.0017 (0.0022)	0.434
Doctors	−0.7479 (0.0192)	<0.001
Midwives	0.0978 (0.0042)	<0.001
ANC	0.0015 (0.0006)	<0.001
Zero-inflation model
Intercept	3.6729 (0.5349)	<0.001
Referral in	−0.0472 (0.0200)	0.018
Referral out	0.0161 (0.0106)	0.129
Midwives	−0.2972 (0.0570)	<0.001
Random effects
Groups	Name	Variance
Year	Intercept	0.1279
Region	Intercept	0.4067