Table 1. Characteristics of study population.
| Number of respondents in category (n) | Proportion of respondents (%) | |
|---|---|---|
| Age (years) of respondents | ||
| Younger than 40 | 1,531 | 27.17 |
| 40–49 | 2,268 | 40.25 |
| 50–59 | 1,121 | 19.89 |
| 60–69 | 469 | 8.32 |
| 70–79 | 163 | 2.89 |
| Older than 80 | 83 | 1.47 |
| Total | 5,635 | 100 |
| Sex of respondents | ||
| Female | 2,576 | 45.21 |
| Male | 3,122 | 54.79 |
| Total | 5,698 | 100 |
| Ever been to school | ||
| Yes | 4, 926 | 86.66 |
| No | 758 | 13.34 |
| Total | 5,684 | 100 |
| Level of education (grade) of respondents | ||
| Less than primary school | 983 | 19.95 |
| Primary school | 2,708 | 54.96 |
| Secondary/ High School | 1,139 | 23.12 |
| College/ Pre-University/ University | 96 | 1.95 |
| Post graduate degree | 1 | 0.02 |
| Total | 4,927 | 100 |
| Level of income (Kshs) of respondents | ||
| Less than 1,000 | 315 | 6.65 |
| 1,000 to 2,499 | 776 | 16.39 |
| 2,500 to 4,999 | 1,254 | 26.48 |
| 5,000 to 7,499 | 1,115 | 23.54 |
| 7,500 or greater | 1,276 | 26.94 |
| Total | 4,736 | 100 |
| Type of work | ||
| Unestablished own business (Informal) | 2,062 | 36.28 |
| Established own business (formal) | 131 | 2.3 |
| Informal salaried | 487 | 8.57 |
| Formal salaried | 372 | 6.54 |
| Informal casual | 1,511 | 26.58 |
| Formal casual | 258 | 4.54 |
| Rural agriculture | 13 | 0.23 |
| Urban agriculture | 37 | 0.65 |
| None currently | 740 | 13.02 |
| Other | 73 | 1.28 |
| Total | 5,684 | 100 |
| Number of hours worked | ||
| Less than 8 hours | 1,085 | 26.42 |
| 8–10 hours | 2,340 | 56.98 |
| Greater than 10 hours | 682 | 16.61 |
| Total | 4,107 | 100 |
| Quality of air in home | ||
| Very High | 282 | 4.98 |
| High | 1,349 | 23.8 |
| Moderate | 2,617 | 46.18 |
| Low | 1,024 | 18.07 |
| Very low | 395 | 6.97 |
| Total | 5,667 | 100 |