Table 1

Bivariate analysis of the relationship between malaria and covariates (sex, age, period, and climate season).

Covariates
Cases
Incidence density(1)
Confidence Interval 95%
Log-Likelihood ratio test
p-value

Sex






     Male
323
6.1
5.5
6.8
0.25
0.6188
     Female
294
5.9
5.3
6.6



Age






     Less than 1 year
259
6.7
5.9
7.5
25.16
< 0.001
     From 2 to 5 years
287
6.7
6.0
7.5


     Greater than 5 years
80
3.8
3.0
4.7



Period






     First (Dec 96 – Oct 97)
121
4.8
4.0
5.8
73.74
< 0.001
     Second (Nov 97 – Oct 98)
173
4.2
3.6
4.9


     Third (Nov 98 – July 99)
324
8.9
7.9
9.9



Climate Season






     Dry (May-Oct)
199
3.9
3.4
4.5
73.71
< 0.001
     Wet (Nov-Apr)
419
8.1
7.4
9.0



(1) per 1000 children at risk per week

Abellana et al. Malaria Journal 2008 7:228   doi:10.1186/1475-2875-7-228