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Table 3 Cure rates stratified according to infestation intensity (assessed by 3 minutes of visual inspection before treatment)

From: A highly efficacious pediculicide based on dimeticone: Randomized observer blinded comparative trial

 

Dimeticone group

Permethrin group

P value

Effect size

 

Cured/total

% (95% CI)

Cured/total

% (95% CI)

 

RR (95% CI)

Low or moderate infestationa

      

   Day 2

37/38

97.4% (86.2% – 99.9%)

23/31

74.2% (55.4% – 88,1%)

P = 0.004

1.31 (1.06–1.63)

   Day 7

32/38

84.2% (68.7% – 94.0%)

23/31

74.2% (55.4% – 88,1%)

P = 0.3

1.14 (0.88–1.46)

   Day 9

36/37

97.3% (85.5% – 99.9%)

25/31

80.6% (62.5% – 92.5%)

P = 0.02

1.21 (1.01–1.45)

Heavy infestationb

      

   Day 2

32/35

91.4% (76.9% – 98.2%)

25/41

61.0% (44.5% – 75.8%)

P = 0.002

1.50 (1.15–1.95)

   Day 7

15/35

42.9% (26.3% – 60.4%)

20/41

48.8% (32.9% – 64.9%)

P = 0.6

0.88 (0.54–1.44)

   Day 9

34/35

97.1% (85.1% – 99.9%)

23/40

57,5% (40.9% – 73.0%)

P < 0.0001

1.69 (1.29–2.22)

  1. a < 5 active head lice at the beginning of the study; see material and methods
  2. b ≥ 5 active head lice