Table 4. Evaluation of the effect of participatory women’s groups on postpartum psychological distress.

	Including tea garden residents			Excluding tea garden residents
	Ratio of means	95% CI	P-value	Ratio of means	95% CI	P-value
2010	1.41	0.39, 3.53	0.509	1.14	0.35, 3.20	0.801
2011	1.78	0.17, 3.18	0.391	1.89	0.18, 3.37	0.350
2012	0.74	0.15, 2.94	0.662	0.70	0.14, 2.83	0.617
2010 and 2011	1.44	0.28, 3.08	0.524	1.38	0.28, 3.02	0.586
2010, 2011 and 2012	1.28	0.24, 2.91	0.680	1.23	0.23, 2.86	0.735