Table 4.

RR (95% CI) of LRTI in relation to maternal arsenic exposure in pregnancy (mean of urinary arsenic measures at GW8 and GW30) stratified by infants’ age, mothers’ education level, socioeconomic status, and BMI in the in 2002–2003 pregnancy cohort in Matlab, Bangladesh.

	Infant’s ageb		Educationb		Socioeconomic statusb,c		BMI (kg/m2)b
Arsenic levela	0–5 months	6–11 months	No schooling	Attended school	Low	High	< 18.5	≥ 18.5
< 39d	1	1	1	1	1	1	1	1
39–64	1.11 (0.81–1.51)	1.47 (1.05–2.05)	2.68 (1.65–4.35)	0.97 (0.75–1.27)	1.83 (1.28–2.62)	0.85 (0.58–1.25)	1.38 (0.91–2.10)	1.22 (0.93–1.60)
65–132	1.23 (0.90–1.66)	1.48 (1.06–2.07)	2.74 (1.64–4.655)	1.08 (0.94–1.38)	1.79 (1.26–2.55)	1.08 (0.73–1.58)	1.19 (0.78–1.81)	1.41 (1.08–1.83)
133–261	1.31 (0.97– 1.78)	1.89 (1.38–2.60)	3.28 (2.04–5.27)	1.20 (0.93–1.55)	2.42 (1.73–3.37)	1.23 (0.85–1.80)	1.73 (1.17–2.56)	1.51 (1.16–1.96)
262–977	1.57 (1.18–2.10)	1.81 (1.32–2.49)	2.41 (1.48–3.92	1.53 (1.20–1.94)	2.25 (1.61–3.14)	1.57 (1.09–2.26)	1.92 (1.31–2.80)	1.54 (1.19–2.01)

^aSum of inorganic and methylated arsenic species.

^bAdjusted for all the variables in the table except the one used for stratification.

^cSocioeconomic status: low, asset index 1 or 2; high, asset index 4 or 5.

^dReference group.