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Table 1 Calculated power (%) to detect various levels of incidence reduction under three incidence scenarios

From: The impact of long-lasting microbial larvicides in reducing malaria transmission and clinical malaria incidence: study protocol for a cluster randomized controlled trial

Annual incidence rate (cases/1000 population)

Malaria incidence reduction

50 %

40 %

30 %

20 %

Observed in the site: 52

99.9

98.7

85.3

48.6

Low-incidence value: 26

99.7

95.2

74.4

38.9

High-incidence value: 78

99.9

99.3

89.0

53.0