. 2010 Jan 8;13(2):153–164. doi: 10.1007/s00737-009-0134-x

Table 2.

Predictive values of the EPDS at the second trimester

		EPDS at second trimester (time 1)
		9/10					14/15
		Positive predictive value^a		Negative predictive value^b		McNemar Test	Positive predictive value^a		Negative predictive value^b		McNemar Test
		Number of cases (n)	Proportion (%)	Number of cases (n)	Proportion (%)	Sig.	Number of cases (n)	Proportion (%)	Number of cases (n)	Proportion (%)	Sig.
EPDS at third trimester (time 2)	9/10	354/561	63.1	860/1,008	85.3	<0.001	126/156	80.8	1,037/1,413	73.4	<0.001
EPDS at third trimester (time 2)	14/15	104/561	18.5	989/1,008	98.1	<0.001	58/156	37.2	1,348/1,413	95.4	<0.001
EPDS at 6 weeks after delivery (time 3)	9/10	113/214	52.8	316/396	79.8	0.137	47/65	72.3	399/545	73.2	<0.001
EPDS at 6 weeks after delivery (time 3)	14/15	39/214	18.2	382/396	96.5	<0.001	20/65	30.8	512/545	93.9	0.213

9/10 a cut-off of 9/10, 14/15 a cut-off of 14/15, EPDS Edinburgh Postnatal Depression Scale

^aPositive predictive value: the proportion of women who screened positively in the second trimester (time 1), using the EPDS, who exhibited perinatal depressive symptomatology in the third trimester (time 2) or at 6 weeks after delivery (time 3)

^bNegative predictive value: the proportion of women who screened negatively in the second trimester (time 1), using the EPDS, who did not exhibit perinatal depressive symptomatology in the third trimester (time 2) or at 6 weeks after delivery (time 3)