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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