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Table 1 Prevalence and intensity of S. haematobium in first-year students (aged 5–8 years), 9–12-year-olds, 13–14-year-olds, and adults (aged 20–55 years) at baseline of a SCORE study in northern Mozambique

From: Urogenital schistosomiasis in Cabo Delgado, northern Mozambique: baseline findings from the SCORE study

Age group (years) No. of individuals examined No. of individuals infected (%)a Intensity of S. haematobium infection
Arithmetic mean intensity (eggs/10 ml)b No. of heavily infected individuals (%)
Both sexes
 5–8 7463 4709 (63.1) 58.2 1440 (33.8)
 9–12 7317 4873 (66.6) 71.9 1633 (33.9)
 13–14c 5429 4010 (73.9)   
 20–55 4259 1910 (44.8) 23.9 300 (15.8)
 Totald 19,039 11,492 (60.4) 55.8 3373 (17.7)
Females
 5–8 3196 1922 (60.1) 44.7 517 (27.1)
 9–12 3013 1890 (62.7) 54.4 547 (29.0)
 13–14c 2276 1666 (73.2)   
 20–55 1329 560 (42.1) 22.0 88 (15.9)
 Totald 7538 4372 (58.0) 44.6 1152 (23.8)
Males
 5–8 4261 2784 (65.3) 68.1 923 (33.2)
 9–12 4239 2946 (69.5) 84.9 1086 (37.1)
 13–14c 3153 2344 (74.3)   
 20–55 2924 1349 (46.1) 24.8 212 (15.8)
 Totald 11,424 7079 (62.0) 63.12 2221 (26.7)
  1. aFor sexes combined, there was a significant difference in prevalence between age groups (P < 0.001) with the following sequence: 9–12 > 5–8 > 20–55 years (χ2 test). Within every age group, males had higher prevalence of infection than females in 5–8, 9–12 and 20–55 years (P < 0.001, P < 0.001, P < 0.01, respectively)
  2. bFor sexes combined, there was no difference between the two groups of children (age group 5–8 and 9–12 years), but intensity of infection among children was significantly higher (P < 0.001) than adults (one-way ANOVA). There was no difference between genders among school children, but male adults had higher intensities than females (P < 0.02)
  3. cEligibility results: prevalence of haematuria by dipstick from a single urine sample from children aged 13–14 years
  4. dTotal only includes the microscopic urine filtration data from the cross-sectional analysis, and excludes eligibility data that was collected in 13–14 year-olds using reagent strips only