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Table 2 Annual malaria incidence (expressed as the number of clinical cases per 1000 person-year) and number of annual malaria cases around large dams in sub-Saharan Africa

From: Malaria around large dams in Africa: effect of environmental and transmission endemicity factors

  Distance cohort (km) 2000 2005 2010 2015
Malaria incidence No. cases Malaria incidence No. cases Malaria incidence No. cases Malaria incidence No. cases
Stable < 5 43.3* 3,448,500 42.4* 3,485,490 39.3* 3,832,743 29.7* 3,511,483
0–1 52.1 543,332 50.6 595,494 45.1 593,448 36.8 453,107
1–2 48.3 731,648 47.1 749,875 40.6 796,294 31.5 563,976
2–5 40.2 2,173,520 39.2 2,140,121 37.7 2,443,001 28.3 2,494,400
5–10 25.2 3,708,154 34.1 3,921,842 31.1 3,899,928 22.4 3,492,512
Unstable < 5 25.4 481,626 19.1 473,660 14.1 486,790 11.7 639,143
0–1 32.8# 136,061 26.9# 122,680 19.2# 113,286 16.9# 152,670
1–2 29.8 113,619 20.1 91,603 16.5 104,727 12.8 148,981
2–5 21.1 231,946 16.6 259,376 12.1 268,777 9.9 337,492
5–10 16.2 419,324 11.8 388,561 9.4 380,143 6.1 344,780
  1. * In stable area, annual malaria incidence rate differenced significantly in communities < 5 km and 5–10 km from the dam for all years (Mann–Whitney test, P < 0.05 for all comparisons after the Bonferroni corrections for multiple comparisons)
  2. #In unstable area, annual malaria incidence differed significantly among the four distance cohorts for all years (Mann–Whitney test, P < 0.05 for all comparisons after the Bonferroni corrections for multiple comparisons)