Clinical risk factors for preterm birth and evaluating maternal psychology in the postpartum period

Table 4 Assignment table

Factors	Assignment
Age	≥ 35 years old = 1, < 35 years old = 0
Maternal weight change (kg)	≥ 10.45 = 1, < 10.45 = 0
Mode of conception	Artificial insemination = 1, spontaneous conception = 0
Gestational diabetes mellitus	With = 1, without = 0
Reproductive tract infection	With = 1, without = 0
Cervical length in the second trimester (mm)	≥ 29.05 = 1, < 29.05 = 0
White blood cell count (× 109/L)	≥ 9.35 = 1, < 9.35 = 0
Neutrophil percentage	≥ 0.85 = 1, < 0.85 = 0
Maternal anxiety and depression	With = 1, without = 0
Delivery status	Premature = 1, full-term = 0