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. 2020 Dec 28;15(12):e0244335. doi: 10.1371/journal.pone.0244335

Table 1. Socio-demographic characteristics of the respondents, and percentage of smokers by socio-demographic characteristics (n = 385).

Variables Frequency Percentage Smoker
Number Row percentage
Age group
15–17 154 40.0 30 19.5
18–20 111 28.8 45 40.5
21–24 120 31.2 80 66.7
p-value = <0.001
Average age (SD) 18.9 (3.1)
Education
Below secondary 48 12.5 28 58.3
Secondary 197 51.1 53 26.9
Higher secondary and above 140 36.4 74 52.9
p-value = <0.001
Average year of schooling (SD) 9.6 (3.3)
Education of father
Below secondary 169 43.8 65 38.5
Secondary 108 28.1 42 38.9
Higher secondary and above 108 28.1 48 44.4
p-value = 0.57
Average year of schooling of father (SD) 7.3 (5.4)
Education of mother
Below secondary 207 53.8 77 37.2
Secondary 125 32.4 54 43.2
Higher secondary and above 53 13.8 24 45.3
p-value = 0.40
Average year of schooling of mother (SD) 5.9 (4.7)
Occupation
Day labourer 20 5.2 16 80.0
Service 20 5.2 12 60.0
Business 65 16.9 34 52.3
Students 258 67.0 83 32.2
Unemployed 22 5.7 10 45.5
p-value = <0.001
Monthly income (in BDT)
No income 257 66.8 79 30.7
< 5000 21 5.5 13 61.9
≥5000 107 27.7 63 58.9
p-value = <0.001
Average income (SD) 4439 (7877.8)
Family’s monthly income (in BDT)
< 15000 97 25.2 26 26.8
15000–25000 177 46.0 75 42.4
> 25000 111 28.8 54 48.6
p-value = <0.001
Average monthly income of family (SD) 22634 (12958.1)
Financially dependent on the family
Dependent 276 71.7 93 33.7
Independent 109 28.3 62 56.9
p-value = <0.001
Current smoking status of father*
No 164 42.6 55 33.5
Yes 221 57.4 100 45.2
p-value = <0.02
Current smoking status of brother
No 317 82.3 114 36.0
Yes 68 17.7 41 60.3
p-value = <0.001
Current smoking status of close friend
No 246 63.9 54 22.0
Yes 139 36.1 101 72.7
p-value = <0.001
Smoking brings the risks of chronic diseases
No 6 1.6 5 83.3
Yes 379 98.4 150 38.8
p-value = <0.03
Smoking is harmful to other non-smokers
No 14 3.6 11 78.6
Yes 371 96.4 144 38.8
p-value = <0.001

Notes: BDT: Bangladesh currency–Taka; SD indicates Standard Deviation

* No mother of the study participants found as smoker; The p-values are of chi-square tests; P-values <0.20 are in boldface.