Table 1 Selected characteristics compared between the subset of women who were eligible for this analysis and all other women recruited into the case control study

Variables

n

Mean ± SD

n

Mean ± SD

  Age (years)

542

  34.9 ± 11.3

147

  25.5 ± 5.0

<0.001

Median ± IQR

Median ± IQR

  Water As (μg/L)

526

  32.9 ± 269.4

146

  17.2 ± 120.4

0.02

  Toenail As (μg/g)

540

  2.70 ± 6.97

145

  2.12 ± 3.65

0.10

%

%

Skin Lesions

0.80

  No

272

  50.18

72

  48.98

  Yes

270

  49.82

75

  51.02

Body Mass Index (kg/m²)

0.70

  <18.5

158

  29.10

44

  29.93

  18.5–24.9

332

  61.14

92

  62.59

  ≥25

53

  9.76

11

  7.48

Marital Status

<0.001

  Not married

72

  13.33

37

  25.17

  Ever married

468

  86.67

110

  74.83

Education

<0.001

  No formal education

318

  58.56

53

  36.1

  Primary

74

  13.63

17

  11.56

  Secondary and above

150

  27.62

77

  52.38

Chews betel nut

<0.001

  No

385

  71.2

131

  89.7

  Yes

156

  28.8

15

  10.3

Water Arsenic

0.16

  ≤10 ug/L

196

  36.10

65

  44.22

  10–50 ug/L

130

  23.94

34

  23.13

  >50 ug/L

217

  39.96

48

  32.65

Hemoglobin (g/L)

0.99

  Normal (Hb ≥120 g/L)

443

  81.58

120

  81.63

  Anemia (Hb <120 g/L)

100

  18.42

27

  18.37