Table 2.

Logistic regression results comparing deliveries and skilled birth attendance before and after implementation of the output-based approach (OBA) voucher programme

	Facility deliveries		Skilled birth attendants
	Odds ratio	(95% CI)	Odds ratio	(95% CI)
Timeframe
Before OBA programme	ref.
After OBA programme	1.4***	(1.19–1.58)	1.2**	(1.02–1.36)
Location
Korogocho	ref.
Viwandani	0.6***	(0.55–0.74)	0.7***	(0.64–0.87)
Mother’s age at birth
12–23	ref.
24–34	1.2**	(1.04–1.47)	1.3**	(1.05–1.50)
35+	1.1	(0.84–1.50)	1.1	(0.83–1.51)
Parity
1	ref.
2	0.6***	(0.53–0.77)	0.6***	(0.50–0.74)
3	0.5***	(0.37–0.58)	0.5***	(0.38–0.61)
4+	0.4***	(0.31–0.50)	0.4***	(0.27–0.45)
Mother’s education
None	ref.
Primary	1.01	(0.85–1.21)	1.0	(0.81–1.17)
Secondary or more	1.6***	(1.28–1.98)	1.6***	(1.29–2.03)
Socio-economic status
Poorest	ref.
Least poor	1.3***	(1.15–1.53)	1.3***	(1.13–1.51)
N	4355		4354

Notes: **P < 0.01; ***P < 0.001 95% CI: 95% Confidence Interval.