Table 3 Percentages of the genotypic (n) and the mutant [119S] allelic (95% confidence interval) frequencies of the ace-1 gene in Anopheles gambiae s.l. populations by period and location using a layered 3 × 3 × 3 contingency table

Boukoumbé

BIRS

27

0% (0)

0% (0)

100% (27)^a

0% (0–0%)

DIRS

31

0% (0)

42% (13)^b

58% (18)^b

21% (11–31%)

WIRS

277

0% (0)

5% (15)^a

95% (262)^a

3% (1–4%)

Péhunco

BIRS

28

0% (0)

7% (2)^a,b

93% (26)^a

4% (−1% to 8%)

DIRS

33

9% (3)

24% (8)^b

67% (22)^b

21% (11–31%)

WIRS

554

0% (0)

7% (40)^a

93% (514)^a

4% (3–5%)

Toucountouna

BIRS

26

0% (0)

4% (1)^a

96% (25)^a

2% (−2% to 6%)

DIRS

36

3% (1)

31% (11)^b

67% (24)^b

18% (9–27%)

WIRS

80

0% (0)

6% (5)^a

94% (75)^a

3% (0–6%)

Total

BIRS

81

0% (0)

4% (3)^a

96% (78)^a

2% (0–4%)

DIRS

100

4% (4)

32% (32)^b

64% (64)^b

20% (14–26%)

WIRS

911

0% (0)

7% (60)^a

93% (851)^a

3% (2–4%)