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Table 4 Physical integrity – comparison of estimates of the average hole index, hole area and hole circumference for a) Interceptor LN; b) alpha-cypermethrin CTN

From: Interceptor® long-lasting insecticidal net: phase III evaluation over three years of household use and calibration with Phase II experimental hut outcomes

a) Interceptor LN
Survey (month) Hole index Hole area (cm2) Hole circumference (cm)
  Mean (1SD) Median (IQR) Geometric mean Mean (1SD) Median (IQR) Geometric mean Mean (1SD) Median (IQR) Geometric mean
0 0 (0) 0 (0) 0 0 (0) 0 (0) 0 0 (0) 0 (0) 0
6 139 (351) 2 (0–83) 7 83 (193) 2 (0–69) 6 59 (113) 6 (0–48) 8
12 170 (630) 2 (0–68) 7 88 (263) 1 (0–75) 6 54 (118) 5 (0–65) 7
24 442 (696) 78 (3–533) 46 282 (393) 84 (3–404) 37 194 (240) 63 (11–326) 45
36 332 (442) 126 (30–549) 70 229 (283) 102 (33–346) 60 162 (187) 127 (36–212) 54
b) alpha-cypermethrin CTN
Survey (month) Hole index Hole area (cm2) Hole circumference (cm)
  Mean (1SD) Median (IQR) Geometric mean Mean (1SD) Median (IQR) Geometric mean Mean (1SD) Median (IQR) Geometric mean
0 0 (0) 0 (0) 0 0 (0) 0 (0) 0 0 (0) 0 (0) 0
6 121 (324) 5 (1–51) 12 91 (257) 4 (1–60) 10 73 (186) 16 (4–53) 15
12 205 (458) 8 (0–173) 14 134 (253) 6 (0–87) 12 95 (161) 19 (0–76) 14
24 - - - - - - - - -
36 - - - - - - - - -