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Table 1 Demographic, distance and temporal relationships with malaria infection, Plasmodium vivax (Pv) and Plasmodium falciparum (Pf), in Gilgel-Gibe dam area, south-western Ethiopia, 2005

From: Malaria and water resource development: the case of Gilgel-Gibe hydroelectric dam in Ethiopia

  Pv   Pf  
Variable Rate Crude OR (95% CI) Rate Crude OR (95% CI)
Age (years)     
<1 'control' 4/96 (4.2%) 1 3/96 (3.1%) 1
   'at-risk' 13/190 (6.8%) 1.69 (0.52,5.52) 9/190 (4.7%) 1.54 (0.49,4.79)
1–4 'control' 18/396 (4.5%) 1 13/396 (3.3%) 1
   'at-risk' 34/429 (7.9%) 1.81 (1.21,2.71)** 23/429 (5.4%) 1.67 (1.42,6.66)
5–9 'control' 12/282 (4.3%) 1 1/282 (0.4%) 1
   'at-risk' 36/462 (7.8%) 1.9 (0.76,4.77) 27/462 (5.8%) 17.4 (1.22,249.24)**
Village/groups     
   'control' 34/774 (4.4%) 1 17/774 (5.4%) 1
   'at-risk' 83/1081 (7.7%) 1.81 (1.17,2.79)** 59/1081 (2.2%) 2.57 (1.01,6.57)**
Month     
October 'control' 15/253 (5.9%) 1 10/253 (4.0%) 1
   'at-risk' 56/559 (10.0%) 1.76 (0.88,3.53)* 34/559 (6.1%) 1.57 (0.32,7.71)
November 'control' 13/260 (5.0%) 1 3/260 (1.2%) 1
   'at-risk' 25/262 (9.5%) 2.00 (1.38,2.92)** 7/262 (2.7%) 2.35 (0.17,32.73)
December 'control' 6/261 (2.3%) 1 4/261 (1.5%) 1
   'at-risk' 2/260 (0.8%) 0.33 (0.02,4.96) 18/260 (6.9%) 4.78 (1.03,22.23) **
  1. * = significant at 0.1 level ** = significant at 0.05 level