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. 2012 Apr 6;7(4):e33189. doi: 10.1371/journal.pone.0033189

Table 3. Model-fitting for anemia, malaria and urinary schistosomiasis, and geohelminths controlling for random-effects at the hamlet level.

Condition Demographic group Response variable Baseline Factor Odds ratio (and CI95) P-value
Anemia* Children Sex Boy Girl 0.82 (0.68–0.98) 0.032
Age (continuous) +1 year 0.92 (0.90–0.95) <0.00001
Malaria (microscopy Negative Positive 1.79 (1.37–2.32) <0.00001
Urinary schistosomiasis (Hemastix®) Negative Positive 1.30 (0.97–1.75) 0.078
Malaria Children Sex Boy Girl 0.82 (0.66–1.03) 0.082
Age (continuous) +1 year 1.01 (0.98–1.04) 0.61
Mother knows malaria? No Yes 0.63 (0.47–0.85) 0.002
Mothers Age +1 year 0.96 (0.94–0.98) <0.001
Pregnant No Yes 0.46 (0.24–0.90) 0.023
History of previous treatment No Yes 0.60 (0.40–0.92) 0.020
S. haematobium Children Sex Boy Girl 0.99 (0.74–1.34) 0.97
Age +1 year 1.12 (1.07–1.16) <0.00001
Child bathes in river? No Yes 1.75 (1.06–2.91) 0.030
Child bathes in dam? No Yes 20.23 (1.30–314.9) 0.032
Mothers Age +1 year 0.99 (0.97–1.01) 0.20
Pregnant? No Yes 0.56 (0.32–1.00) 0.049
Self-reported water contact Less frequently Daily 2.08 (1.22–3.53) 0.007
STH infections* Children Age +1 year 1.08 (1.06–1.11) <0.00001
Sex Boy Girl 0.90 (0.74–1.10) 0.313
Self-reported worms in stool? No Yes 1.45 (1.17–1.80) <0.001
Self-reported tummy pain? No Yes 1.29 (0.96–1.74) 0.095

Anemia model included 1913 children >2 years of age, malaria model included 2309 children and 878 mothers, urinary schistosomiasis model included 2094 children and 894 mothers, and model for geohelminth infections included 2085 children.

*

Note that none of the variables tested for mothers was significantly associated with anemia or with geohelminth infection.