Table 5.

Variable assignment

Item	Assignment mode
Age	≤ 30 yr = 0, > 30 yr = 1
Education level	Junior high school and below = 0, secondary school or high school = 1, junior college = 2, Bachelor’s degree or above = 3
Plan a pregnancy	Yes = 0, no = 1
Number of births	Primary birth = 0, produce = 1
Prenatal sleep status	Good = 0, general = 1, occasional insomnia = 2, frequent insomnia = 3
Marriage harmony situation	Harmonious = 0, disharmonious = 1
Mode of delivery	Natural childbirth = 0, cesarean section = 1
Neonatal health	Healthy = 0, unhealthy = 1
Stress communication	-
Mutual support	-
Negative support	-
Agent support	-
Joint support	-
DCI total average	-

DCI: Dyadic coping inventory.