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.

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%