Table 2.

Hazard ratio (HR) for mortality in participants in relation to baseline arsenic exposure

	All-cause mortality*		Chronic-disease mortality*
	Deaths	HR (95% CI)	Deaths	HR (95% CI)
Arsenic (μg/L) in well water
0·1–10·0	74	1·00	58	1·00
10·1–50·0	90	1·34 (0·99–1·82)	69	1·33 (0·94–1·87)
50·1–150·0	98	1·09 (0·81–1·47)	83	1·22 (0·87–1·70)
150·1–864·0	131	1·68 (1·26–2·23)	101	1·68 (1·21–2·33)
Arsenic dose (μg per day)
0·041–35·0	87	1·00	66	1·00
35·1–163·0	97	1·10 (0·83–1·47)	80	1·21 (0·88–1·67)
163·1–401·0	91	1·09 (0·81–1·46)	76	1·22 (0·88–1·71)
401·1–4898·0	118	1·54 (1·17–2·04)	89	1·58 (1·15–2·18)
Total arsenic in urine (μg/g)
7·0–105·0	83	1·00	64	1·00
105·1–199·0	96	1·07 (0·80–1·43)	80	1·17 (0·84–1·62)
199·1–352·0	100	1·22 (0·91–1·63)	83	1·37 (0·98–1·90)
352·1–5000·0	105	1·45 (1·09–1·94)	77	1·47 (1·05–2·06)

Data are number or HR (95% CI).

^*Multivariate estimates were adjusted for age, sex, body-mass index, systolic blood pressure, education, and smoking status.