3.3. Poisson Regression Model
Table 3 shows the results of a Poisson model considering a cluster adjusted effect of a 5 ◦C increase
in minimum and maximum temperature and demonstrates a significant effect of a 5 ◦C increase in
both minimum and maximum temperature on incident cases of diarrhoea in children under 5 years,
IRR 1.39 (95% CI: 1.30–1.48) (minimum temperature) and IRR 1.31 (95% CI: 1.22–1.40) (maximum
temperature). The IRRs represent a 39% (95% CI: 30%–48%) and a 31% (95% CI: 22%–40%) increase in
cases for minimum and maximum temperatures, respectively, for each five-degree increase. The cluster
specific effect is different in some sub districts compared to others, but these differences were not
statistically significant (Table 3).