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Table 1 Washing frequency and net appearance

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 (month) IconMaxx lambda-cyhalothrin CTN
No. nets Mean (SD) no. of washesa General aspect of nets % No. nets Mean (SD) no. of washesa General aspect of nets %
Clean Slightly dirty Dirty Very Dirty Clean Slightly dirty Dirty Very Dirty
Cross section survey
 0 30 0 30 0 0 0 30 0 30 0 0 0
 6 30 3 (2.0) 7 21 69 3 30 2 (1.7) 18 26 52 4
 12 30 1 (0.3) 45 0 39 16 30 1 (0.4) 36 3 36 25
 24 30 4 (1.5) 13 13 55 19
 36 50 4 (2.6) 16 6 56 22
Cohort survey
 0 264 0 100 0 0 0 266 0 266 0 0 0
 12 98 6 (2.0) 29 7 54 10 113 6 (2.0) 36 5 52 7
 24 46 6 (3.2) 28 14 46 12
 36 40 7 (3.5) 26.5 26.5 15 32
  1. aMean number of washes per year