TABLE 1.

DEMOGRAPHIC DATA OF THE PRETERM AND CONTROL GROUPS AT THE FIRST AND SECOND LUNG FUNCTION TEST

	Preterm (n = 26)	Controls (n = 24)	P
Male sex, n (%)	17 (65)	12 (50)	0.390
White race, n (%)	23 (89)	19 (79)	0.456
Smoke exposure in pregnancy, n (%)	5 (19)	6 (25)	0.738
Family history of asthma, n (%)	17 (65)	10 (42)	0.155
First test
Age, wk	10 (3–31)	23 (3–81)	<0.001
Weight, kg	5.8 ± 1.60	7.4 ± 1.93	0.002
Length, cm	58.3 ± 5.45	65.7 ± 7.5	<0.001
z Score, length/age	−0.7 ± 0.9	−0.5 ± 1.1	0.650
z Score, weight/age	0.2 ± 1.1	−0.1 ± 1.1	0.372
Second test
Age, wk	64 (47–97)	64 (33–120)	0.429
Weight, kg	10.6 ± 1.6	10.2 ± 1.8	0.437
Length, cm	78.9 ± 4.1	78.0 ± 6.1	0.539
z Score, length/age	−0.4 ± 0.88	−0.6 ± 0.97	0.356
z Score, weight/age	−0.2 ± 1.26	−0.5 ± 0.96	0.348

Values are expressed as numbers (%) for categorical variables, and mean (SD) or median (range) for continuous variables.