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Table 4 Net effectiveness based on WHO recommended criteria. Optimal effectiveness: KD60 ≥ 95% or mortality ≥ 80%, minimal effectiveness: KD60 ≥ 75% or mortality ≥ 50%.

From: Long-term field performance of a polyester-based long-lasting insecticidal mosquito net in rural Uganda

A

Proportion of nets with optimal effectiveness at different times of follow-up

Type of net

Baseline (n) % 95% CI

6 Months (n) % 95% CI

12 Months (n) % 95% CI

18/20 Months (n) % 95% CI

24/27 Months (n) % 95% CI

36/39 Months (n) % 95% CI

PermaNet 1st generation

(10) 100

69.2 – 100

(40) 37.5

22.7 – 54.2

(40) 42.5

27.0 – 59.1

(40) 15.0

5.7 – 29.8

(40) 45.0

29.3 – 61.5

(38) 10.5

2.9 – 24.8

PermaNet 2nd generation

(10) 100

69.2 – 100

(40) 100

91.2 – 100

(40) 97.5

86.8 – 99.9

(40) 97.5

86.8 – 99.9

(38) 71.0

54.1 – 84.6

(40) 90.0

76.3 – 97.2

Conventional net

(10) 100

69.2 – 100

(40) 7.5

1.6 – 20.4

Not done

Not done

Not done

Not done

Conventional net retreated

(13) 100

75.3 – 100

(34) 61.8

43.6 – 77.6

(11) 45.5

16.8 – 76.6

Not done

Not done

Not done

B

Proportion of nets with minimal effectiveness at different times of follow-up

Type of net

Baseline (n) % 95% CI

6 Months (n) % 95% CI

12 Months (n) % 95% CI

18/20 Months (n) % 95% CI

24/27 Months (n) % 95% CI

36/39 Months (n) % 95% CI

PermaNet 1st generation

(10) 100

69.2 – 100

(40) 70.0

53.5 – 83.4

(40) 60.0

43.3 – 75.1

(40) 30.0

16.6 – 46.5

(40) 65.0

48.3 – 79.4

(38) 18.4

7.7 – 34.3

PermaNet 2nd generation

(10) 100

69.2 – 100

(40) 100

91.2 – 100

(40) 100

91.2 – 100

(40) 100

91.2 – 100

(38) 92.1

78.6 – 98.3

(40) 100

91.2 – 100

Conventional net

(10) 100

69.2 – 100

(40) 25.0

12.7 – 41.2

Not done

Not done

Not done

Not done

Conventional net retreated

(13) 100

75.3 – 100

(34) 73.5

55.6 -87.1

(11) 72.7

39.0 – 99.9

Not done

Not done

Not done