Table 4.

Factors associated with summative PC-ISP preference scores (multivariable linear regression model)

	Combined preference scores
	B	95%CI
Age	-0.04**	(0.06, -0.01)
Parity	0.06	(-0.04, 0.15)
Marital status (Ref. Not married/partnered)
Married or partnered	0.18*	(0.00, 0.35)
Education (ref. Primary or less)
Vocational/Secondary	-0.06	(0.17, 0.06)
College/University	-0.06	(-0.40, 0.27)
Employment (ref. no)
Yes	0.12*	(0.01, 0.22)
Birthplace (ref. born elsewhere)
Born in Nairobi or Kiambu Counties	0.05	(-0.14, 0.24)
Self-rated health	-0.03	(-0.09, 0.03)
Covered under health scheme or health insurance (ref. No)
Yes	0.04	(-0.21, 0.30)
Total support persons	-0.18*	(-0.29, -0.07)
Support person types
Male partner (Ref. No)	0.21	(-0.02, 0.44)
Yes
Mother (Ref. No)	0.35*	(0.10, 0.61)
Yes
Mother-in-law (Ref. No)	0.26	(-0.23, 0.74)
Yes
Father (Ref. No)	0.17	(-0.24, 0.58)
Yes
Sister (Ref. No)	0.23	(-0.07, 0.52)
Yes
Brother (Ref. No)	0.10	(-0.32, 0.53)
Yes
Other family members (Ref. No)	0.21	(0.00, 0.43)
Yes
Accompanied to facility (Ref. No support person accompanied)
Yes	0.23	(-0.06, 0.52)
Labor & childbirth (Ref. No support person during L&D)
Yes	0.09	(-0.13, 0.30)
Postpartum (Ref. No support person postpartum)
Yes	0.12**	(0.05, 0.19)
Household decision-making (Ref. no say in all decisions)
Yes	0.11*	(0.03, 0.19)
Facility type (Ref. Public hospital)
Public health center	0.01	(-0.11, 0.13)
Private facility	-0.10	(-0.22, 0.01)
Total providers attending birth	-0.11	(-0.30, 0.08)
Selected facility based on quality	0.05	(-0.17, 0.26)
Referred to facility	0.14	(-0.02, 0.30)

Notes: *p < 0.05, **p < 0.01, ***p < 0.001 ; B = Beta coefficient

The Friend/Neighbor/Other support person measure was omitted from models because of collinearity