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

Table 1 Comparison of clinical data

Categories		Preterm birth group (n = 60)	Full term group (n = 588)	P value
Age				0.003b
	≥ 35 years old	47	341
	< 35 years old	13	247
Prenatal BMI				0.355
	≥ 23 kg/m2	42	376
	< 23 kg/m2	18	212
History of pre-pregnancy diseases				0.540
	With	5	35
	Without	55	553
Maternal weight change (kg)		8.8 ± 4.7	12.1 ± 3.9	< 0.001c
Parity				0.608
	Primipara	47	441
	Multipara	13	147
Mode of conception				0.005
	Spontaneous conception	52	559
	Artificial insemination	8	29
History of alcohol and tobacco exposure during pregnancy				0.361
	With	5	35
	Without	55	553
Nutritional supplements during pregnancy
	Folic acid supplementation in early pregnancy	47	417	0.252
	Multivitamin supplements in the second trimester	49	441	0.303
	No nutritional supplements during pregnancy	4	41	0.771
Regular physical activity				0.562
	Yes	9	106
	No	51	482
Gestational diabetes mellitus				0.001b
	Yes	11	35
	No	49	553

^bP < 0.01.

^cP < 0.001.

BMI: Body mass index.