No Relationship between Maternal Iron Status and Postpartum Depression in Two Samples in China

Table 4

EPDS total scores in anemic and nonanemic mothers^a.

	Pilot sample			Confirmatory sample
	Anemic	Non-anemic	𝑃	Anemic	Non-anemic	𝑃^b
Early/mid pregnancy
EPDS scale, 24–48 h				(𝑛=72)	(𝑛=483)
				6.4±4.1	6.6±4.3	0.43^c
EPDS scale, 6 wk	(𝑛=12)	(𝑛=125)		(𝑛=71)	(𝑛=417)
	7.9±6.1	7.4±3.4	0.69	5.7±4.4	6.4±4.1	0.16
Late pregnancy
EPDS scale, 24–48 h				(𝑛=181)	(𝑛=366)
				7.0±4.1	6.3±4.3	0.10
EPDS scale, 6 wk	(𝑛=54)	(𝑛=81)		(𝑛=165)	(𝑛=315)
	7.7±4.1	7.2±3.4	0.51	6.6±4.3	6.1±4.0	0.26
3 days postpartum
EPDS scale, 24–48 h				(𝑛=140)	(𝑛=124)
				7.2±3.9	7.2±4.1	0.48
EPDS scale, 6 wk				(𝑛=130)	(𝑛=118)
				5.9±4.0	6.4±4.0	0.40

^aValues are unadjusted means ± SD.
^bP values are based on GLM analyses with covariate control as indicated.
^cMaternal education was a significant covariate.