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Table 4 Physical integrity–comparison of estimates of the average hole index, hole area between cross-sectional and cohort surveys for ICON Maxx and Lambda-cyhalothrin CTN

From: Effectiveness of a long-lasting insecticide treatment kit (ICON® Maxx) for polyester nets over three years of household use: a WHO phase III trial in Tanzania

Survey type Survey (month) ICON Maxx LLIN lambda-cyhalothrin CTN
No. of nets Hole index Hole area cm2 No. of nets Hole index Hole area cm2
Mean (SD) Median (IQR) GMa Mean (SD) Median (IQR) GMa Mean (SD) Median (IQR) GMa Mean (SD) Median (IQR) GMa
Cross section 0 30 0 0 0 0 0 30 0 0 0 0 0 0
Cohort   264 0 0 0 0 0 266 0 0 0 0 0 0
Cross section 12 30 513 (2048) 13 (162) 17 244 (865) 15 (162) 13 30 214 (425) 24 (265) 19 126 (206) 29 (163) 16
Cohort   98 166 (326) 0 (196) 8 101 (183) 0 (138) 7 113 114 (261) 0 (57) 6 67 (139) 0 (65) 5
Cross section 24 30 589 (1017) 197 (352) 71 373 (767) 86 (352) 49
Cohort   46 271 (435) 27 (415) 23 164 (247) 31 (204) 19
Cross section 36 30 740 (986) 417 (615) 59 483 (632) 226 (615) 101
Cohort   40 535 (614) 300 (876) 133 382 (393) 271 (738) 80