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Table 3 Associations between age and seasonality the incidence of malaria and non-malaria fever.

From: Use of the slide positivity rate to estimate changes in malaria incidence in a cohort of Ugandan children

Incidence of malaria
Category Group Episodes Person years Incidence IRR* (95% CI) p-value
Age 4-5 years 358 394 0.91 1.0 (reference) -
  6-7 years 303 418 0.72 0.85 (0.66-1.10) 0.22
  8-10 years 264 454 0.58 0.64 (0.50-0.84) 0.001
Season Mar-Apr + Jul-Dec 439 856 0.51 1.0 (reference) -
  Jan-Feb + May-Jun 486 411 1.18 2.52 < 0.001
Non-malaria fever
Age 4-5 years 857 394 2.18 1.0 (reference) -
  6-7 years 693 418 1.66 0.75 (0.64-0.87) < 0.001
  8-10 years 683 454 1.5 0.66 (0.57-0.77) < 0.001
Season Rest of the year 1682 1048 1.61 1.0 (reference) -
  May-Jun 551 219 2.52 1.57 (1.40-1.77) < 0.001
  1. *Incidence rate ratio estimated using a negative binomial regression model