Table 2. Descriptive characteristics by treatment allocation.
| Variable | Control | Screened ceiling | Full screening |
|---|---|---|---|
| Entomological | |||
| Mean number of Anopheles gambiae s.l. /trap/night |
37.5 (31.6-43.3) | 19.1 (16.1-22.1) | 15.2 (12.9-17.4) |
| Estimated entomological inoculation rate (EIR) |
|||
| 2006 | 2.27 (1.38-3.16) |
1.14 (0.85-1.42) |
0.77 (0.57-0.96) |
| 2007 | 1.35 (0.74-1.97)) |
0.90 (0.22-1.57) |
0.42 (0.24-0.63) |
| Clinical | |||
| Haemoglobin density (g/L) | |||
| 2006 | 98 (93-102) | 103(99-106) | 103(100-106) |
| 2007 | 103(98-109) | 105(102-108) | 105(102-108) |
| Prevalence of moderate anaemia (<8 g/L) | |||
| 2006 | 19.1% | 11.4% | 11.0% |
| 2007 | 17.6% | 12.4% | 14.6% |
| Prevalence of severe anaemia (<5 g/L) | |||
| 2006 | 2.2% | 0.7% | 0.6% |
| 2007 | 2.7% | 0% | 0.7% |
| Parasite prevalence (all parasitaemias) | |||
| 2006 | 32.6% | 32.1% | 28.7% |
| 2007 | 9.5% | 8.0% | 8.6% |
| Parasite prevalence (high parasitaemias, ≥5000 parasites/μL) |
|||
| 2006 | 10.1% | 5.0% | 3.7% |
| 2007 | 1.4% | 2.9% | 4.6% |
| Crude mortality rates (deaths/100 children) | |||
| 1.53 (3/196) |
0.57 (2/350) |
0.26 (1/389) |
|
| Acceptability | |||
| Proportion of residents willing to continue use of intervention |
1% | 46% | 94% |
| Proportion of control arm residents opting for intervention installation |
1% a | 17% | 82% |
Data are arithmetic mean (95% CI) or % frequency unless otherwise indicated. EIRs are mean number of sporozoite-infected A gambiae/person/trapping season. Clinical data were recorded at the end of the rainy season in both years.
a
Chose not to have either screening type installed.