Table 4

Latent class logit model results (n=299, McFadden pseudo R²=0.279, log-likelihood function=−1194.76, number of observations=2392)

	Group 1				Group 2				Group 3
	β	P value	OR (95% CI)	WTS* (INR)	β	P value	OR (95% CI)	WTS* (INR)	β	P value	OR (95% CI)	WTS* (INR)
Utility parameters
Constant	0.16	0.403			−0.42	<0.01			1.27	<0.01
Fixed monthly salary	0.52	<0.01	1.68 (1.46 to 1.93)		0.15	<0.01	1.16 (1.04 to 1.28)		140.7	0.845	1.15 (0.88 to 1.17)
Mandatory regular training leading to promotion to next level ANM	1.31	<0.01	3.71 (2.55 to 5.39)	2518.7	0.64	<0.01	1.90 (1.49 to 2.44)	4293.0	0.01	0.944	1.01 (0.71 to 1.43)
Priority free family health-check	0.03	0.880	1.03 (0.73 to 1.44)		0.41	<0.01	1.50 (1.14 to 1.97)	2700.8	0.28	0.131	1.32 (0.92 to 1.89)
Field visits supervision	0.14	0.135	1.15 (0.96 to 1.38)		0.11	0.206	1.11 (0.94 to 1.31)		−0.22	0.105	0.80 (0.58 to 1.05)
Travel allowance	0.00	0.984	1.00 (0.87 to 1.15)		0.06	0.274	1.06 (0.96 to 1.18)		0.09	0.387	1.09 (0.90 to 1.33)
Workload	0.06	0.254	1.06 (0.96 to 1.16)		−0.06	0.230	0.94 (0.86 to 1.04)		−0.21	0.012	0.81 (0.69 to 0.96)
Free household products worth 400 INR	−0.73	<0.01	0.48 (0.32 to 0.71)	−1,410.5	−0.49	<0.01	0.61 (0.48 to 0.78)	−3,260.5	−0.14	0.517	0.87 (0.56 to 1.33)
Sociodemographic predictors
Education	1.39	<0.01	4.03 (1.47 to 11.00)		1.96	<0.01	7.09 (1.84 to 27.33)		Reference
Other paid job	0.59	0.23	1.80 (0.70 to 4.62)		1.29	<0.1	3.64 (1.14 to 11.60)		Reference
Main household earner	−0.89	<0.1	0.41 (0.16 to 2.07)		−1.54	<0.1	0.21 (0.07 to 0.70)		Reference
Class probabilities	0.514				0.353				0.133

*WTS means willingness to ‘sacrifice salary’ analysis (per 1000 INR) after ‘fixed monthly salary‘.
ANM, auxiliary nurse midwife.