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Table 2 Weighted prevalence of microfilaridermia, nodules and cutaneous signs presence according to gender and age groups

From: Important progress towards elimination of onchocerciasis in the West Region of Cameroon

  N Parasitological examination Clinical examination
mf + (n) Weighted mf prevalence (%)a Geometric mean of mf in carriers (mf/ss ± SD) Nodule + (n) Weighted nodule prevalence (%)a Geometric mean of nodule in carriers ± SD cut + (n) Weighted cut prevalence (%)a
Sex
 Female 1136 57 4.7 3.0 ± 4.9 29 1.7 1.3 ± 1.5 56 2.2
 Male 922 68 6.5 3.5 ± 3.9 44 2.6 1.3 ± 1.5 24 1.1
Total 2058 125 5.5 3.2 ± 4.3 73 2.1 1.3 ± 1.5 80 1.7
Age categories (years)
 5–9 472 19 4.0 4.7 ± 4.7 8 1.7 1.2 ± 1.4 1 0.2
 10–19 609 27 4.4 2.5 ± 4.8 1 0.2 1.0 ± (-)b 0 0
 20–29 156 16 10.1 6.9 ± 2.9 5 3.2 1.2 ± 1.4 1 0.7
 30–39 173 13 7.5 1.5 ± 2.4 14 8.0 1.4 ± 1.6 6 3.4
 40–49 180 21 11.6 3.6 ± 5.1 11 6.1 1.3 ± 1.5 13 7.2
 50–59 147 12 8.3 1.4 ± 2.4 12 8.2 1.0 ± 1.0 16 10.8
 60+ 297 15 5.1 2.8 ± 4.4 20 6.6 1.4 ± 1.8 41 14.0
Total 2034 123 5.5 3.2 ± 4.3 71 2.1 1.3 ± 1.5 78 1.7
  1. Abbreviations: N number examined, Mf + (n) number with microfilaria positive skin snip, Nod + (n) number of nodule carriers, Cut + (n) number with cutaneous sign, SD standard deviation
  2. aIn each gender category, the indices were adjusted on age; In each age category, the indices were adjusted on sex; in the total populations, indices were adjusted on sex and age
  3. bStandard deviation not calculated as the number of observations is 1
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