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 [%].

Cottingham et al.

Cottingham et al. Nutrition Journal 2013 12:149   doi:10.1186/1475-2891-12-149

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