Table 3.

Differences in birth characteristics and demographics of preterm and full-term groups.

	Preterm		Full-term
Continuous variables	n	M (SD)	n	M (SD)	t	df	p	d
Age (months)	22	27.32 (2.72)	136	26.01 (2.53)	2.24	156	0.03	0.50
Gestational age (weeks)	22	35.17 (1.42)	136	39.37 (1.23)	14.61	156	<0.001	3.18
Birth weight (g)	22	2,395.91 (609.44)	136	3,485.27 (493.00)	9.30	156	<0.001	1.97
Categorical variables	n	%	n	%	Fisher's Exact Test p
Sex					0.768
Males	19	86.4	110	80.9
Female	3	13.6	26	19.1
Birth Weight <2,500 g					<0.001
No	14	63.6	136	100.0
Yes	8	36.4	0	0.0
Size for gestational age					0.167
Small	6	27.3	17	12.5
Average	13	59.1	103	75.7
Large	3	13.6	16	11.8
Complications at birth					<0.001
Yes	18	81.8	42	31.6
No	4	18.2	91	68.4

Equal variances assumed for t-tests. n, number of participants; M (SD), Mean (Standard Deviation).