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Table 1 Factors associated with uncomplicated clinical malaria, Ouidah–Kpomasse–Tori Bossito health district

From: Effectiveness of insecticidal nets on uncomplicated clinical malaria: a case–control study for operational evaluation

Variables N case N control Crude OR (95 % CI) p value
Information about children
Sleeping every night under an LLIN for the 2 weeks before the survey
 Sometimes or never 414 1116 1  
 Every night 85 423 0.54 (0.42–0.70) <0.0001
Age group (month)
 24–60 394 809 1  
 0–23 105 730 0.29 (0.23–0.37) <0.0001
Sex
 Male 252 776 1  
 Female 247 763 0.99 (0.82–1.23) 0.9756
Use of drugs perceive to be prophylactic treatment against malaria
 No 126 488 1  
 Yes 373 1051 1.37 (1.09–1.73) 0.0063
Hour of sleeping last night     <0.0001
 At night fall 354 933 1  
 Between night fall and 10 p.m. 123 478 0.68 (0.54–0.86) 0.0011
 After 10 p.m. 22 128 0.45 (0.28–0.72) 0.0009
Use other anti-mosquito measures
 Never 317 1109 1  
 Every day or sometimes 182 430 1.48 (1.20–1.83) 0.0003
Information about mosquito net
Age (year)     
 >3 156 373 1  
 ≤3 343 1166 0.70 (0.56–0.88) 0.0018
Number of times washed since obtained
 >20 111 333 1  
 ≤20 388 1206 0.96 (0.76–1.23) 0.7742
Holes
 No 251 744 1  
 Yes 248 795 0.92 (0.76–1.13) 0.4444
Information about mother or guardian
Age (year)     0.0004
 <25 110 365 1.07 (0.83–1.38) 0.6121
 25–35 234 830 1  
 >35 155 344 1.60 (1.26–2.03) 0.0001
Primary school at least
 No 365 1048 1  
 Yes 134 491 0.78 (0.63–0.98) 0.0337
Profit-making activity     0.4144
 Farming/breeding/fishing/handicraft 219 645 1  
 Employee status/shopkeeper 269 844 1.54 (0.79–3.01) 0.2046
 No activity 11 50 1.45 (0.74–2.82) 0.2761
Number of children in the household     0.0054
 1 57 252 1  
 2 107 362 1.31 (0.91–1.87) 0.1456
 3 105 337 1.38 (0.96–1.98) 0.0834
 ≥4 230 588 1.73 (1.25–2.40) 0.0010
Knows mosquitoes transmit malaria
 No 10 25 1  
 Yes 489 1514 0.81 (0.38–1.70) 0.5727
Knows mosquito net protection against malaria
 No 37 105 1  
 Yes 462 1434 0.91 (0.62–1.35) 0.6523
  1. Factors associated with uncomplicated clinical malaria were grouped into information (in italic text) about (i) children aged 0–60 months, (ii) mosquito net, and (iii) mother or guardian of children characteristics. Univariate conditional logistic regression taking into account cluster effect was used