Table 3.

Test of mediation by perceived stress and lack of perceived control, adjusted for other covariates and social support

	Perceived stress		Lack of mastery/control
Effect Sizea	β (95% CI)b	Standard β (95% CI)b	β (95% CI)b	Standard β (95% CI)b
Programme effect on depression, without mediator	−1.52***	−0.062***	−1.52***	−0.062***
	(−2.18 to −0.86)	(−0.089 to −0.035)	(−2.18 to −0.86)	(−0.089 to −0.035)
Programme effect on depression, adjusted for mediator (direct effect)	−1.00**	−0.040**	−1.34***	−0.054***
	(−1.61 to −0.38)	(−0.065 to −0.016)	(−1.92 to −0.76)	(−0.078 to −0.031)
Programme effect on mediator	−0.64**	−0.044**	−0.25	−0.023
	(−1.05 to −0.24)	(−0.071 to −0.016)	(−0.56 to 0.057)	(−0.052 to 0.0053)
Mediator effect on depression	0.82***	0.49***	0.73***	0.32***
	(0.78–0.85)	(0.47–0.51)	(0.67–0.79)	(0.29–0.34)
Programme effect on depression, through mediator (indirect effectc)	−0.53***	−0.021***	−0.18	−0.0074
	(−0.82 to −0.22)	(−0.033 to −0.010)	(−0.39 to 0.0043)	(−0.016 to 0.0007)

^aEffect sizes are OLS regression coefficients (β) and standardized coefficients (standard β) adjusted for the following covariates: maternal age, education, social support and head of household status and household ethnicity, crowding, dependency ratio, wealth index, head of household occupation indices and state. Standard errors for the effect estimates were adjusted for clustering at the community level.

^bStandard errors for the estimates were adjusted for clustering at the community level or bootstrapped (indirect effect only).

^cThe product of the coefficient for the programme effect on the mediator and the coefficient for the mediator effect on depression controlling for the programme.

*P < 0.05; **P < 0.01; ***P < 0.001.