Implications of insecticide resistance for malaria vector control with long-lasting insecticidal nets: trends in pyrethroid resistance during a WHO-coordinated multi-country prospective study

Table 4 Impact of time since bednet distribution (years) on mosquito mortality. Results from generalised mixed-effect models examining the impact time since bednet distribution on mosquito mortality

Country	Odds ratio for change in mortality per year (95% CI)	P-value
All countries combined^a	1.34 (1.31–1.37)	<0.001
Benin^b	3.20 (3.02–3.39)	<0.001
Cameroon^c	0.95 (0.90–0.99)	0.016
India^c	1.62 (1.52–1.73)	<0.001
Kenya^b	0.59 (0.56–0.62)	<0.001
Sudan^c	1.60 (1.53–1.67)	<0.001

^aAdjusted for country
^bAdjusted for district
^cAdjusted for district, temperature and humidity
Results are presented in terms of change in mortality of mosquitoes for each year since a mass bednet distribution took place in-country. Odds ratios are adjusted for locality and temperature and humidity where indicated. The results are shown for each country, as well as all countries combined (with country included as a covariate). Cluster was included as a random effect in all models