Analysis of influencing factors and the construction of predictive models for postpartum depression in older pregnant women

Table 1 Single factor analysis of postpartum depression in older pregnant women (n = 239)

Characteristics	PPD group (n = 51)		No-PPD group (n = 188)		χ2	P value
	n	Percent	n	Percent
Age (yr)					2.145	0.143
35-40	40	78.4	163	86.7
> 40	11	21.6	25	13.3
Education level					8.290	0.004
High school and below	33	64.7	79	42.0
College or higher	18	35.3	109	58.0
Family relationships					10.672	0.001
Harmony	19	37.3	118	62.8
Disharmony	32	62.7	70	37.2
Reproductive history					0.920	0.337
Primipara	14	27.5	65	34.6
Multipara	37	72.5	123	65.4
Pregnancy complications					5.520	0.019
Yes	20	39.2	43	22.9
No	31	60.8	145	77.1
Delivery method					0.045	0.832
Spontaneous labor	22	43.1	78	41.5
Cesarean section	29	56.9	110	58.5
Separation of the mother and infant after birth					9.681	0.002
Yes	12	23.5	15	8.0
No	39	76.5	173	92.0
Feeding methods of newborns					4.838	0.089
Artificial feeding	11	21.6	19	10.1
Mixed feeding	18	35.3	79	42.0
Exclusive breastfeeding	22	43.1	90	47.9

PPD: Postpartum depression.