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

From: Relationship between arsenic skin lesions and the age of natural menopause

Variables N % Arsenic skin lesions   
    Yes (N = 95) No (N = 92) Mean difference p
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
  1. Abbreviation: SD Standard Deviation.