Accuracy of erythrogram and serum ferritin for the maternal anemia diagnosis (AMA): a phase 3 diagnostic study on prediction of the therapeutic responsiveness to oral iron in pregnancy

Table 1 The table 3 × 3 to distribute the tests results on phase III accuracy studies

	Reference standard ‘responsiveness to therapeutic test with oral iron’
Diagnostic test result (erythrocyte indices or serum ferritin)	Iron deficiency present	Lost, not performed or indeterminate	Iron deficiency absent	Total
Positive	a	v	b
Lost, not performed or indeterminate	w	x	y
Negative	c	z	d
Total

ISSN: 1471-2393