Table 1 Distribution of socio-demographic characteristics and menstrual details of the study population by arsenic skin lesions

Age (years); Mean ± SD

48.00 ± 3.64

-

47.14 ± 3.48

48.89 ± 3.60

1.74

.001

Occupation

Housewife

184

98.4

93

91

-

.22

Daily Labour

2

1.1

2

0

Govt Service

1

0.5

0

1

Monthly household

9019 (8000) BDT

-

9476 (7000) BDT

8549 (4000) BDT

927 BDT

.28

Income (BDT, US$); Mean (median)

116 (102) US$

122 (90) US$

110 (51) US$

12 US$

Education

No formal education

114

61.0

53

61

-

.07

Primary completed

68

36.4

41

27

Secondary completed

5

2.7

1

4

Marital status

Single

2

1.1

2

0

-

.51

Married

165

88.2

83

82

Widowed

16

8.6

8

8

Separated

3

1.6

2

1

Divorced

1

0.5

0

1

Menstrual regularity

Yes

168

89.8

86

82

-

.81

No

19

10.2

9

10

Menstrual Frequency

Twice a month

2

1.1

1

1

-

.30

Once a month

169

90.4

88

81

Once in every 2 months

10

5.3

3

7

Once in every 3 months

4

2.1

3

1

Once in >3 months

2

1.1

0

2

Arsenic skin lesions duration

<10 years

4

2.1

4

0

-

-

>10 years

91

48.7

91

0

Age of Menarche; Mean ± SD

14.00 ± 1.36

-

14.17 ± 1.37

13.82 ± 1.33

.355

.069

Age of Menopause; Mean ± SD

44.95 ± 3.35

-

44.17 ± 3.28

45.74 ± 3.25

1.568

.001

Reproductive period; Mean ± SD

30.94 ± 3.51

-

29.99 ± 3.31

31.91 ± 3.48

1.914

.001