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Table 1 Characteristics of 2 040 children, and intensity of infection with S. haematobium in 1 912 children from 20 schools in Lusaka Province, Zambia, 2004

From: Using the hierarchical ordinal regression model to analyse the intensity of urinary schistosomiasis infection in school children in Lusaka Province, Zambia

Variable Mean (St. Dev) Number (%)
Intensity of infection
 No infection (0 eggs/ml: epm)   1 726 (84.6)
 Light infection (1 – 100 epm)   145 (7.1)
 Moderate/heavy infection (>100 epm)   40 (2.1)
Age   9.98 (2.2)
 6–9 years   1 130 (55.9)
 10–15 years   900 (44.1)
Sex
 Female   1 027 (50.4)
 Male   1 000 (49.6)
Altitude
 Plateau   723 (35.5)
 Valley   1 316 (64.5)
NDVI 138.6 (4.9)  
T max 19.6 (3.1)  
Snail abundance (B. globosus) 25.3 (37.1)