Table 2 Percentages of the genotypic (n) and the mutant [1014F] allelic (95% confidence interval) frequencies of the kdr gene in Anopheles gambiae s.l. populations by period and species using a layered 2 × 3 × 3 contingency table

Ag

BIRS

80

40% (32)^a

58% (46)^a

3% (2)^a

69% (62–76%)

DIRS

90

77% (69)^b

22% (20)^b

1% (1)^a

88% (83–93%)

WIRS

833

89% (739)^c

6% (48)^c

6% (46)^a

92% (90–93%)

Non-Ag

BIRS

1

0% (0)

100% (1)^a,b

0% (0)

50% (0–0%)

DIRS

10

50% (5)^a

50% (5)^b

0% (0)

75% (56–94%)

WIRS

78

63% (49)^a

15% (12)^a

22% (17)

71% (63–78%)

Total

BIRS

81

40% (32)^a

58% (47)^a

3% (2)^a

69% (61–76%)

DIRS

100

74% (74)^b

25% (25)^b

1% (1)^a

87% (82–91%)

WIRS

911

87% (788)^c

7% (60)^c

7% (63)^a

90% (88–91%)