Table 5. The frequencies of true carriers and non-carriers within the carrier status based on MCV≤ 74.45 fL.

Carrier state based on<br>MCV ≤ 74.45 fL	True carrier state based<br>on HbA2 ≥ 3.5%	Frequency	Percent	Status
Not a carrier	Not a carrier	324	96.4	True negative
	Carrier	12	3.6	False negative
	Total	336	100.0
Carrier	Not a carrier	52	63.4	False positive
	Carrier	30	36.6	True positive
	Total	82	100.0