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Table 4 Comparative accuracy with which the qualitative (Table 1) and quantitative (Table 2, breakpoints) models predicted the age-grade of male An. gambiae examined in a blind trial.

From: A reliable morphological method to assess the age of male Anopheles gambiae

Actual age group (days) N Proportion of correct classification
   Quantitative model Qualitative model
≤ 4 73 81% 52%
> 4 88 95% 66%
Overall 161 89% 60%