Table 4. Primary outcomes with adjusted odds ratios to assess the effect of intervention over the 12 months follow-up period in intervention and control hospitals in North Central Province of Sri Lanka.

	Control	Intervention	Adjusted for matched pairs & clustering,Not adjusted for covariates			Adjusted for matched pairs & clustering, & Adjusted for covariates #
	Y/n (%)	Y/n (%)	OR	95% CI	P value	OR	95% CI	P value
Activated Charcoal
Overall	555/1625 (34)	649/1699 (38)	2.29	(1.04–5.07)	0.04	2.95	(1.28–6.80)	0.01
Pesticides	295/660 (45)	319/665 (48)	2.37	(0.96–5.85)	0.06	2.64	(1.09–6.40)	0.03
All poison excluding paracetamol & hydrocarbon	479/1243 (39)	534/1281 (42)	2.36	(1.09–5.15)	0.03	2.67	(1.17–6.10)	0.02
Other & unknown poison	73/339 (22)	118/413 (29)	2.61	(1.22–5.59)	0.01	3.43	(1.60–7.31)	0.001
Paracetamol	35/122 (29)	57/156 (37)	2.05	(0.83–5.05)	0.12	2.41	(1.06–5.51)	0.04
Hydrocarbon	8/162 (5)	18/170 (11)	2.21	(0.65–7.57)	0.21	1.85	(0.61–5.65)	0.28
Forced emesis	977/1625 (60)	900/1699 (53)	0.81	(0.58–1.14)	0.23	0.99	(0.80–1.24)	0.95
Pralidoxime (organophosphate only n = 439)	14/224 (6)	13/215 (6)	0.94	(0.31–2.89)	0.92	0.98	(0.29–3.30)	0.98

^#Adjusted for covariates - poison type (except for sub-category of poison types), hospital category.