| Characteristic of participants | Frequencies (n) | Percentage (%) |
| Gender Male | 485 | 88.3% |
| Female | 64 | 11.7% |
| Age groups of workers in years 18 - 29 |
235 |
42.8% |
| 30 - 39 years | 229 | 41.9% |
| 40 - 49 years | 83 | 15.1% |
| 50 - 59 years | 2 | 0.4% |
| Marital status Single |
364 |
66.2% |
| Married | 137 | 25% |
| Divorced | 14 | 2.6% |
| Widowed | 4 | 0.7% |
| Separated | 8 | 1.5% |
| Cohabiting | 22 | 4% |
| Education level None |
32 |
5.8% |
| Primary | 210 | 38.3% |
| Secondary | 275 | 50.1% |
| Tertiary | 35 | 5.8% |
| Occupation status Bricklayer |
124 |
22.6% |
| Painter | 66 | 12% |
| Electrician | 29 | 5.3% |
| Plumber | 62 | 11.3% |
| Engineer | 7 | 1.2% |
| Carpenter | 70 | 12.8% |
| Labourer | 123 | 22.4% |
| Driver | 15 | 2.7% |
| Other | 53 | 9.7% |
| Employment Type Permanent |
400 |
72.9% |
| Fixed | 83 | 15.1% |
| Casual | 66 | 12% |