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Table 2 Malaria prevalence ratio by location (urban or rural) and time of the survey (May or October)

From: School-based malaria prevalence: informative systematic surveillance measure to assess epidemiological impact of malaria control interventions in the Democratic Republic of the Congo

Survey period and location (U = urban/R = rural) Blood film results Samples Prevalence ratio*
(CI: 95%)
Positive Negative
May   R Number 380 227 607 2.007
(1.865–2.161)
% 62.6 37.4
U Number 1598 3526 5124
% 31.2 68.8
Total Number 1978 3753 5731
% 34.5 65.5
October   R Number 317 260 577 1.839
(1.686–2.007)
% 54.9 45.1
U Number 1250 2935 4185
% 29.9 70.1
Total Number 1567 3195 4762
% 32.9 67.1
Total   R Number 697 487 1184 1.924
(1.818–2.036)
% 58.9 41.1
U Number 2848 6461 9309
% 30.6 69.4
Total Number 3545 6948 10,493
% 33.8 66.2
  1. * All Chi square comparisons between locations were highly significant (p < 0.0001)