Table 1.

Basic parameters for preterm-born group versus reference group.

	Preterm born 1997 (n = 70)	Preterm born 1998 (n = 70)	Preterm born 2015 (n = 12)	Reference 2015 (n = 27)
Height (cm)	145.32 ± 9.96	149.31 ± 9.47	162.9 ± 10.2	167.5 ± 5.6
Body weight (kg)	38.24 ± 11.98	42.16 ± 11.80	60.1 ± 14.77	61.8 ± 6.7
BMI (kg/m2)	17.8 ± 3.79	18.6 ± 3.30	22.6 ± 4.62	22.0 ± 1.80
Chest circumference inhaled (cm)	70.92 ± 7.33	74.11 ± 6.91	82.2 ± 9.57	81.6 ± 6.14
Chest circumference exhaled (cm)	66.47 ± 8.52	69.22 ± 7.12	75.3 ± 9.11	74.1 ± 5.94

BMI, body mass index.