Diet and toenail arsenic concentrations in a New Hampshire population with arsenic-containing water

Nutrition Journal

Table 1 Summary statistics for the study population

Variable	Total	Water arsenic	Water arsenic
	population	<1 μg/L	≥1 μg/L
Drinking water arsenic (μg/L)	2.72 (0.35)	0.27 (0.01)	10.86 (1.36)
Toenail arsenic (μg/g)	0.12 (0.005)	0.10 (0.004)	0.19 (0.02)
Age (years)	61.1 (0.3)	61.2 (0.4)	60.7 (0.7)
Intake from household tap water (# 8 oz. glasses/d)	5.0 (0.1)	5.1 (0.1)	5.0 (0.2)
Energy intake (kcal/d)	1920 (22)	1912 (25)	1944 (42)
Sex
Female	330 [61]	254 [39]	76 [39]
Male	522 [39]	401 [61]	120 [61]
Smoking Status
Never Smoked	275 [32]	208 [32]	67 [34]
Has Smoked	577 [68]	447 [68]	130 [66]
Season
Winter	168 [20]	127 [19]	41 [21]
Spring	171 [20]	137 [21]	34 [17]
Summer	246 [29]	175 [27]	71 [36]
Fall	267 [31]	216 [33]	51 [26]
Case–control Status
Control	211 [25]	167 [25]	44 [22]
Bladder Cancer	248 [29]	168 [28]	62 [31]
Basal Cell Skin Cancer	198 [23]	150 [23]	48 [24]
Squamous Cell Skin Cancer	195 [23]	152 [23]	43 [22]

Legend: Summary statistics are provided first for the total study population (n = 852), and then for the two household drinking water exposure groups: <1 μg/L (n = 655) and ≥1 μg/L (n = 197). Continuous variables are given as mean (SE) and categorical variables as N [%].