Table 2.

Frequency of women with depression^±, and case-identification using two methods* on the PHQ-2

	Pregnancy		Postpartum
	Baseline n = 303	36-weeks n = 275	6-weeks n = 252	26-weeks n = 227
	n	n	n	n
	%	%	%	%
	(95% CI)	(95% CI)	(95% CI)	(95% CI)
Probable major depression±	7	5	14	14
	2.3	1.8	5.6	6.2
	(0.9–4.7)	(0.6–4.2)	(3.1–9.2)	(3.4–10.1)
At least probable minor depression±	12 4.0	12 4.4	33 13.1	32 14.1
	(2.1–6.8)	(2.3–7.5)	(9.2–17.9)	(9.9–19.3)
PHQ-2 total score ≥ 2	49	58	50	35
	16.2	21.1	19.8	15.4
	(12.2–20.8)	(16.4–26.4)	(15.1–25.3)	(11.0–20.8)
PHQ-2 total score ≥ 3	14	20	19	10
	4.6	7.3	7.5	4.4
	(2.6–7.6)	(4.5–11.0)	(4.6–11.5)	(2.1–8.0)
PHQ-2 Screen positive	103	118	83	77
	33.9	42.9	32.9	33.9
	(28.7–39.6)	(37.0–49.0)	(27.2–39.1)	(27.8–40.5)
Anhedoniaa (no depressed mood)	80	96	61	52
	26.4	34.9	24.2	22.9
	(21.5–31.8)	(29.3–40.9)	(19.1–30.0)	(17.6–28.9)
Depressed moodb (no anhedonia)	68	71	68	57
	22.4	25.8	27.0	25.1
	(17.9–27.6)	(20.8–31.4)	(21.6–32.9)	(19.6–31.3)
Depressed mood and anhedoniac	45	49	46	32
	14.9	17.8	18.3	14.1
	(11.0–19.4)	(13.5–22.9)	(13.7–23.6)	(9.9–19.3)

95% CI: 95% confidence interval for a sample proportion with binomial (Clopper Pearson) exact

^±Probable major depression: EPDS cut-off score ≥ 15 during pregnancy and ≥ 13 postpartum; At least probable minor depression: EPDS cut-off score ≥ 13 in pregnancy and ≥ 10 postpartum

*PHQ-2: Total score method with two cut-points (≥ 2 and ≥ 3); Categorical method: Screen positive to either Question 1 OR Question 2

**PHQ-2 Question completion: Categories of positive responses on PHQ-2 questions

^aPositive response to PHQ-2 Question 1 and negative response on question 2

^bPositive response to PHQ-2 Question 2 and negative response to question 1

^cPositive response to PHQ-2 Question 1 and question 2