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Table 1 Probit regression line parameters of An. stephensi exposed to DDT (4 %) and Lambda-cyhalothrin (0.05 %) in southeastern Iran

From: Insecticide susceptibility of Anopheles stephensi to DDT and current insecticides in an elimination area in Iran

Insecticides A B ± SE LT50
95 % C.I.
(min)
LT90
95 % C.I.
(min)
χ 2
(df)
P-value
DDT (4 %) -4.097 1.94 ± 0.246 130.25 597.35 5.23 (3) > 0.05
Lambda-cyhalothrin (0.05 %) -7.33 4.65 ± 1.096 37.71 71.12 16.44 (2) < 0.05
  1. Abbreviations: A, intercept; B, slope; SE, standard error; LT50, 95 % CI, lethal time causing 50 % mortality and its 95 % confidence interval; LT90, 95 % CI, lethal time causing 90 % mortality and its 95 % confidence interval; χ 2, heterogeneity about the regression line; df, degrees of freedom