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Table 1 Characteristics of study population

From: Plasmodium falciparum infection and clinical indicators in relation to net coverage in central Côte d’Ivoire

Characteristic N’Dakonankro Yoho Bozi P value
February 2010     
  No. of subjects 301 290 306  
  No. of males:females (%) 151:150 (50:50) 150:140 (52:48) 146:160 (48:52) 0.613
  Mean age in years (standard deviation) 6.7 (2.3) 7.6 (2.6) 8.7 (5.7) <0.001
  No. of children who slept under an ITN or LLIN the night before the interview (%, 95% CI) 75 (24.9, 20.1-30.2) 44 (15.2, 11.2-19.8) 66 (21.6, 17.1-26.6) 0.012
  No. of febrile cases (%, 95% CI) 145 (48.2, 42.4-54.0) 123 (42.4, 36.7-48.3) 104 (34.0, 28.7-39.6) 0.002
  No. of slide positive (%, 95% CI) 167 (55.5, 49.7-61.2) 187 (64.5, 58.7-70.0) 140 (45.8, 40.1-51.6) <0.001
  No. of RDT positive (%, 95% CI) 186 (61.8, 56.0-67.3) 190 (65.5, 59.7-71.0) 174 (56.9, 51.1-62.5) 0.093
  Geometric mean of parasitaemia, expressed in parasites/μl of blood (95% CI) 37.5 (26.0-54.1) 79.9 (54.7-116.6) 18.5 (12.8-26.7)  
  Sensitivity; specificity; PPV; NPV (%, 95% CI) 79.6 (75.7-83.0); 61.0 (56.1-65.8); 71.5 (67.5-75.2); 70.9 (65.8-75.6)
November 2011     
  No. of subjects 45 56 68  
  No. of males:females (%) 25:20 (56:44) 42:14 (75:25) 35:33 (52:48) 0.021
  Mean age in years (standard deviation) 9.3 (1.7) 9.4 (1.8) 10.3 (3.2) 0.010
  No. of children who slept under an ITN or LLIN the night before the interview (%, 95% CI) 21 (46.7, 31.7-62.1) 28 (50.0, 36.3-63.7) 21 (30.9, 20.2-43.3) 0.070
  No. of febrile cases (%, 95% CI) 2 (4.4, 0.5-15.1) 6 (10.7, 4.0-21.9) 4 (5.9, 1.6-14.4) 0.485
  No. of slide positive (%, 95% CI) 35 (77.8, 63.0-88.8) 40 (71.4, 57.8-82.7) 59 (86.8, 76.4-93.8) 0.156
  No. of RDT positive (%, 95% CI) 29 (64.4, 48.8-78.1) 38 (67.9, 54.0-79.8) 47 (69.1, 56.8-79.8) 0.909
  Geometric mean of parasitaemia, expressed in parasites/μl of blood (95% CI) 118.9 (50.1-282.2) 78.9 (35.9-173.4) 136.0 (77.3-239.0)  
  Sensitivity; specificity; PPV; NPV (%, 95% CI) 80.6 (72.9-86.9); 83.3 (67.2-93.6); 94.7 (88.9-98.0); 53.6 (39.7-67.0)
May 2012     
  No. of subjects 137 153 126  
  No. of males:females (%) 71:66 (52:48) 77:76 (50:50) 73:53 (58:42) 0.418
  Mean age in years (standard deviation) 10.7 (0.9) 11.3 (2.0) 12.2 (2.5) <0.001
  No. of children who slept under an ITN or LLIN the night before the interview (%, 95% CI) 63 (46.0, 37.4-54.7) 50 (32.7, 25.3-40.7) 55 (43.7, 34.8-52.8) 0.047
  No. of febrile cases (%, 95% CI) 4 (2.9, 0.8-7.3) 3 (2.0, 0.4-5.6) 5 (4.0, 1.3-9.0) 0.621
  No. of slide positive (%, 95% CI) 111 (81.0, 73.4-87.2) 113 (73.9, 66.1-80.6) 102 (81.6, 73.0-87.4) 0.203
  No. of RDT positive (%, 95% CI) 96 (70.1, 61.7-77.6) 108 (70.6, 62.7-77.7) 79 (63.2, 53.6-71.1) 0.356
  Geometric mean of parasitaemia, expressed in parasites/μl of blood (95% CI) 158.4 (104.1-241.1) 68.7 (45.5-103.7) 125.9 (81.3-194.8)  
  Sensitivity; specificity; PPV; NPV (%, 95% CI) 76.1 (71.1-80.6); 60.7 (49.7-70.9); 87.6 (83.2-91.2); 40.9 (32.4-49.8)
  1. † Significant.