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Table 1 Magnitude of recall bias for campaign nets received and lost

From: Field durability of the same type of long-lasting insecticidal net varies between regions in Nigeria due to differences in household behaviour and living conditions

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%)

  1. HH = household.
  2. 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.