Table 1 Socio-demographics of participants
Socio-economic variables | Response groups | |||
|---|---|---|---|---|
Exposed | Referent | |||
Frequency | % | Frequency | % | |
Age group of the respondents | ||||
≤ 19 years | 81 | 20.2 | 12 | 3.0 |
20–29 years | 119 | 29.8 | 129 | 32.2 |
30–39 years | 84 | 21.0 | 166 | 41.5 |
40–49 years | 68 | 17.0 | 72 | 18.0 |
50–59 years | 33 | 8.2 | 16 | 4.0 |
60–69 years | 11 | 2.8 | 5 | 1.2 |
≥ 70 years | 4 | 1.0 | 0 | 0 |
Total | 400 | 100.0 | 400 | 100.0 |
Exposed: mean age = 31.74 years, SD of age = 12.97 years, range of age = 12 to 73 years Control: mean age = 33.33 years, SD of age = 9.03 years, range of age = 14 to 68 years | ||||
Gender | ||||
Female | 102 | 25.5 | 130 | 32.5 |
Male | 298 | 74.5 | 270 | 67.5 |
Total | 400 | 100.0 | 400 | 100.0 |
Attainment of formal education | ||||
No | 238 | 59.5 | 30 | 7.5 |
Yes | 162 | 40.5 | 370 | 92.5 |
Total | 400 | 100.0 | 400 | 100.0 |
Levels of education | ||||
Primary | 102 | 63.0 | 16 | 4.3 |
Lower secondary | 43 | 26.5 | 76 | 20.5 |
Secondary and higher secondary | 14 | 8.6 | 203 | 54.9 |
University | 3 | 1.9 | 75 | 20.3 |
Total | 162 | 100.0 | 370 | 100.0 |
Duration of work in years | ||||
≤ 5 years | 265 | 66.2 | 237 | 59.2 |
6–10 years | 63 | 15.8 | 113 | 28.2 |
11–15 years | 30 | 7.5 | 28 | 7.0 |
16–20 years | 23 | 5.8 | 19 | 4.8 |
≥ 21 years | 19 | 4.8 | 3 | 0.8 |
Total | 400 | 100.0 | 400 | 100.0 |
Ever smoker | ||||
No | 238 | 59.5 | 260 | 65.0 |
Yes | 162 | 40.5 | 140 | 35.0 |
Total | 400 | 100.0 | 400 | 100.0 |
Current smoker | ||||
No | 26 | 16.0 | 20 | 14.3 |
Yes | 136 | 84.0 | 120 | 85.7 |
Total | 162 | 100.0 | 140 | 100.0 |