Table 1. Demographic characteristics and general pregnancy data.

	Term delivery	Preterm delivery
Number of patients, n = 111 (%)	98 (88)	13 (12)
Age (years), mean ± SD	35 ± 4.61	36 ± 4.31
Gestational age at birth, mean ± SD	39.6 ± 0.98	35.1 ± 0.85
Birth weight, mean ± SD	3455 ± 351 g	2316 ± 205 g
Obstetrical history, n (%)	98 (100)	13 (100)
Preterm delivery < 33 weeks, n (%)	9 (9)	1 (8)
Preterm delivery 33–36 weeks, n (%)	11 (11)	1 (8)
Parity, n (%)
Nulliparous	5 (5)	2 (15)
Primiparous	37 (38)	4 (31)
Multiparous	56 (57)	7 (54)

SD, standard deviation.