Table 1 Characteristics of study participants stratified by larviciding phase and intervention status
Variables | Baseline | First phase | Second phase | Third phase | ||
|---|---|---|---|---|---|---|
| Â | Control | Control | Larviciding | Control | Larviciding | Larviciding |
Individual-level characteristics (n) | 26,338 | 13,818 | 3,096 | 4,749 | 7,366 | 9,170 |
Male sex | 35.2% | 35.5% | 36.6% | 36.3% | 38.2% | 39.4% |
Age | Â | Â | Â | Â | Â | Â |
 Younger than 5 years of age | 15.4% | 13.3% | 13.3% | 13.2% | 11.5% | 10.0% |
 Between 5 and 14 years of age | 27.6% | 27.9% | 29.1% | 28.4% | 29.6% | 31.2% |
 Between 15 and 29 years of age | 28.5% | 29.5% | 29.3% | 28.2% | 28.9% | 29.1% |
 Between 30 and 44 years of age | 16.4% | 17.3% | 16.1% | 18.4% | 18.8% | 18.4% |
 Between 45 and 59 years of age | 7.2% | 7.2% | 7.7% | 7.6% | 7.1% | 7.3% |
 Aged 60 years or above | 4.9% | 4.8% | 4.5% | 4.1% | 4.1% | 4.0% |
 Missing | 0.1% | 0.1% | 0% | 0% | 0% | 0% |
Reported use of mosquito repellent | 1.3% | 4.2% | 3.7% | 2.5% | 3.1% | 3.3% |
Reported use of coil | 5.7% | 8.4% | 5.9% | 5.9% | 7.3% | 5.8% |
Interviewed during the rainy season | 41.1% | 47.5% | 51.4% | 51.8% | 30.9% | 38.3% |
Previously surveyed participant (follow-up) | 16.9% | 31.0% | 30.4% | 32.4% | 31.3% | 27.5% |
Head of household and house characteristics (N) | 5,127 | 2,505 | 522 | 726 | 1,099 | 1,275 |
Male sex | 64.2% | 71.6% | 71.6% | 70.8% | 73.3% | 74.7% |
Age | Â | Â | Â | Â | Â | Â |
 Younger than 30 years of age | 8.2% | 2.4% | 2.9% | 3.0% | 1.7% | 1.6% |
 Between 30 and 49 years of age | 48.1% | 47.3% | 43.9% | 47.2% | 50.8% | 48.9% |
 Between 50 and 64 years of age | 31.1% | 37.0% | 42.3% | 39.5% | 36.6% | 38.4% |
 Aged 65 years or above | 11.7% | 13.1% | 10.9% | 9.9% | 10.5% | 10.6% |
 Missing | 0.9% | 0.2% | 0% | 0.3% | 0.5% | 0.5% |
Occupation of the household head | Â | Â | Â | Â | Â | Â |
 Business/Government/Formal sector | 59.3% | 66.3% | 65.7% | 58.3% | 69.5% | 77.3% |
 Farmer/Fisherman | 2.2% | 1.2% | 1.5% | 1.1% | 0.9% | 0.6% |
 Informal sector | 19.2% | 20.0% | 18.4% | 25.3% | 17.0% | 12.0% |
 Retired/No job/Domestic | 17.9% | 11.5% | 13.8% | 13.8% | 11.7% | 9.2% |
 Missing | 1.4% | 1.0% | 0.6% | 1.5% | 0.8% | 0.9% |
Socio-economic status | Â | Â | Â | Â | Â | Â |
 Lowest quintile | 31.9% | 18.5% | 21.5% | 5.1% | 9.1% | 7.0% |
 Second quintile | 27.6% | 24.2% | 16.5% | 19.6% | 16.3% | 14.8% |
 Third quintile | 13.9% | 18.2% | 19.2% | 20.9% | 15.0% | 19.2% |
 Fourth quintile | 11.6% | 21.5% | 20.5% | 26.9% | 31.2% | 28.3% |
 Highest quintile | 15.0% | 17.5% | 22.4% | 27.5% | 28.4% | 30.7% |
Education level of household head | Â | Â | Â | Â | Â | Â |
 Illiterate | 6.2% | 6.9% | 4.2% | 4.0% | 2.9% | 1.2% |
 Primary | 58.9% | 43.5% | 48.5% | 37.5% | 32.7% | 35.0% |
 Secondary | 29.2% | 44.2% | 39.1% | 55.9% | 59.4% | 59.8% |
 Tertiary | 3.6% | 4.5% | 7.1% | 1.9% | 4.3% | 3.4% |
 Other | 0.3% | 0% | 0.4% | 0% | 0.1% | 0% |
 Missing | 1.8% | 0.9% | 0.8% | 0.7% | 0.6% | 0.6% |
House has window screens | 23.7% | 24.2% | 45.6% | 22.2% | 30.3% | 39.7% |
House has whole ceiling | 25.1% | 29.5% | 36.0% | 44.5% | 41.7% | 34.8% |