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Table 1 Adult-mosquito catches using battery-powered aspirators: summary statistics

From: Measuring mosquito control: adult-mosquito catches vs egg-trap data as endpoints of a cluster-randomized controlled trial of mosquito-disseminated pyriproxyfen

Metric Statistic CC IC Total
BP IP Subtotal BP IP Subtotal
Sampling effort (in 60 dwellings over 16 months)
Sampling occasions Sum 90 388 478 90 389 479 957
Minutes of aspiration Sum 1049 4325 5374 859 4034 4893 10,267
All-mosquito catches (Aedes + Culex)
Total caught Sum 620 2856 3476 412 468 880 4356
Mosquitoes per 10 min aspirationa Mean 5.81 5.09 (− 12%)b 5.22 3.63 1.14 (− 69%)b 1.60 3.41
SD 12.96 18.84 17.87 8.65 3.92 5.23 13.28
Median 2.11 1.25 1.43 1.11 0.00 0.00 0.00
IQR 1.00–5.00 0.00–4.00 0.00–4.53 0.00–3.56 0.00–0.91 0.00–1.25 0.00–2.50
Maximumc 98.75 322.50 322.50 74.17 43.33 74.17 322.50
Aedes aegypti catches
Total caught Sum 94 217 311 275 197 472 783
Aedes per 10 min aspirationa Mean 0.99 0.52 (− 47%)b 0.61 2.54 0.48 (− 81%)b 0.87 0.74
SD 1.74 1.29 1.40 8.13 1.75 3.93 2.95
Median 0.25 0.00 0.00 0.00 0.00 0.00 0.00
IQR 0.00–1.33 0.00–0.43 0.00–0.76 0.00–2.00 0.00–0.00 0.00–0.50 0.00–0.67
Maximumc 11.67 10.00 11.67 72.50 23.33 72.50 72.50
Culex quinquefasciatus catches
Total caught Sum 526 2639 3165 137 271 408 3573
Culex per 10 min aspirationa Mean 4.82 4.57 (− 5%)b 4.62 1.09 0.66 (− 39%)b 0.74 2.68
SD 12.32 18.70 17.67 2.40 2.94 2.85 12.79
Median 1.43 0.56 0.72 0.00 0.00 0.00 0.00
IQR 0.00–4.47 0.00–3.08 0.00–3.33 0.00–1.11 0.00–0.00 0.00–0.00 0.00–1.67
Maximumc 96.25 322.50 322.50 15.38 38.00 38.00 322.50
  1. aValues computed across the results of individual sampling occasions
  2. bThe percent change in mean mosquito catch (highlighted in bold typeface) between the baseline period and the intervention period is given in parentheses; note that, although the change was always a decrease (hence the minus signs), the decrease was always much larger in the IC than in the CC
  3. cIn all cases, the minimum number of adult mosquitoes caught per 10 min aspiration was zero
  4. Abbreviations: CC, control cluster; IC, intervention cluster; BP, baseline period; IP, intervention period; SD, standard deviation; IQR, inter-quartile range