Table 2.

The association between the risk of cholera and heatwave stratified by rainfall, sex and age examined using multivariable logistic regression models. Each model has four exploratory variables: temperature, heatwave, heatwave in a 2-day lag and heatwave in a 4-day lag.

Stratification	Exploratory variables	OR	95% CI	p – value
No	Temperature	0.99	0.98 – 1.01	0.286
	Heatwave	1.03	0.87 – 1.22	0.768
	Heatwave in a 2-day lag	1.06	0.90 – 1.26	0.478
	Heatwave in a 4-day lag	0.88	0.75 – 1.04	0.128
Day type
Dry (Rainfall=0)	Temperature	0.98	0.97 – 1.00	0.082
	Heatwave	0.99	0.79 – 1.25	0.938
	Heatwave in a 2-day lag	0.95	0.73 – 1.24	0.710
	Heatwave in a 4-day lag	0.80	0.63 – 1.01	0.065
Wet (Rainfall>0)	Temperature	1.00	0.98 – 1.02	1.000
	Heatwave	1.19	0.69 – 2.06	0.524
	Heatwave in a 2-day lag	1.53	1.07 – 2.19	0.019
	Heatwave in a 4-day lag	0.85	0.62 – 1.17	0.307
Sex
Male	Temperature	0.99	0.98 – 1.01	0.257
	Heatwave	0.94	0.73 – 1.20	0.596
	Heatwave in a 2-day lag	1.16	0.91 – 1.48	0.221
	Heatwave in a 4-day lag	0.75	0.60 – 0.95	0.017
Female	Temperature	1.00	0.98 – 1.01	0.702
	Heatwave	1.12	0.89 – 1.41	0.346
	Heatwave in a 2-day lag	0.96	0.76 – 1.23	0.770
	Heatwave in a 4-day lag	1.03	0.82 – 1.29	0.801
Age
<18 years	Temperature	0.99	0.97 – 1.00	0.094
	Heatwave	0.92	0.74 – 1.16	0.498
	Heatwave in a 2-day lag	1.11	0.88 – 1.40	0.387
	Heatwave in a 4-day lag	0.79	0.64 – 0.99	0.036
18 – 64 years	Temperature	1.00	0.98 – 1.01	0.657
	Heatwave	1.20	0.92 – 1.57	0.169
	Heatwave in a 2-day lag	0.94	0.72 – 1.24	0.675
	Heatwave in a 4-day lag	1.04	0.81 – 1.33	0.762
65 years and older	Temperature	1.05	1.00 – 1.11	0.059
	Heatwave	0.97	0.39 – 2.44	0.952
	Heatwave in a 2-day lag	1.73	0.79 – 3.81	0.171
	Heatwave in a 4-day lag	0.81	0.33 – 1.97	0.640