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Table 5 Coefficients and goodness of fit of a logistic binary model predicting the probability of high-risk schools for urinary schistosomiasis in Ogun State, on the basis of observed data of disease and environmental variables: Percentages of correct predictions.

From: Geographical information system and predictive risk maps of urinary schistosomiasis in Ogun State, Nigeria

Observed Urinary Schistosomiasis Predicted Urinary Schistosomiasis Correct prediction (%)
  Absent Present  
Low-risk 456 2 99.6
High-risk 69 6 8.0
Overall    86.7