Table 1.
Magnitude of recall bias for campaign nets received and lost
| Location | Recall of campaign nets received | Recall of campaign nets lost | ||||
|---|---|---|---|---|---|---|
| Year | Mean persons per HH | Mean nets reported received | Nets per person reported | % of first year | Actual lost (received – present) | Reported lost (% of actual) |
| Zamfara | ||||||
| Year 1 | 8.33 | 2.35 | 0.2821 | 100% | 47 | 41 (87.2%) |
| Year 2 | 7.76 | 1.86 | 0.2397 | 84.9% | 70 | 37 (52.9%) |
| Year 3 | 7.99 | 1.77 | 0.2215 | 78.5% | 84 | 26 (31.0%) |
| Nasarawa | ||||||
| Year 1 | 8.39 | 1.73 | 0.2062 | 100% | 243 | 144 (59.3%) |
| Year 2 | 8.71 | 1.71 | 0.1963 | 95.2% | 162 | 83 (51.2%) |
| Year 3 | 8.52 | 1.57 | 0.1843 | 89.4% | 293 | 211 (72.0%) |
| Cross River | ||||||
| Year 1 | 5.36 | 1.63 | 0.3046 | 100% | 75 | 40 (53.3%) |
| Year 2 | 5.71 | 1.40 | 0.2452 | 80.5% | 69 | 35 (50.7%) |
| Year 3 | 5.55 | 1.41 | 0.2541 | 83.4% | 70 | 25 (35.7%) |
HH = household.
Nets received are measured by the nets reported received per person in the household compared to the first year results while nets lost are evaluated by comparing the reported number with the difference between nets received and actually observed.