Table 1.

Sample demographics and differences between preterm and full-term mother-infant dyads.

	Total Sample (n=84)	Preterm Group (n=37)	Full-term Group (n=47)
	Mean ± SD; or N (%); or Median (IQR)			p-value
Infant Factors
EGA	33.8 ±5.8	27.8 ±2.7	38.6 ±1.1	<.0001
Female Gender	45 (54%)	18 (49%)	27 (57%)	.33
Non Caucasian Race	51 (61%)	16 (43%)	35 (74%)	.002
Birthweight (g)		1104.0 ±416.7
Apgars at 1 min		3.7 ±2.5
Apgars at 5 min		5.8 ±2.06
Breast Milk Fed		32 (87%)
Breast Milk at Discharge		18 (49%)
PDA		9 (24%)
IUGR		3 (8%)
NEC		4 (11%)
Brain Injury (n=36)		8 (22%)
ROP		11 (30%)
PMA at Discharge (n=35)		39.7 ±3.4
LOS (days) (n=35)		83.4 ±40.9
Infant Medical Procedures
Days on TPN		11 (6—18.5)
Days on Vent		1 (0–16.50)
NIMV days		13.4 ±18.1
Days on CPAP		2.0 ±4.3
Days on Nasal Cannula		28.5 ±24.7
Maternal Factors
Maternal Age	28.4 ±6.2	29.7 ±6.4	27.4 ±6.0	.13
Cesarean Section Delivery	43 (51%)	27 (71%)	16 (34%)	.001
Multiple Birth	7 (8%)	5 (13%)	2 (4%)	.14
Other Children (n=45)	56 (67%)	21 (55%)	35 (78%)	.03
Marital Status, Single (n=45, full-term)	16 (20%)	7 (19%)	9 (20%)	.86
Income <$25,000 (n=36, preterm; n=43, full-term)	40 (48%)	16 (43%)	24 (56%)	.45
College Degree	26 (31%)	15 (41%)	11 (24%)	.14

Note: Columns shaded black indicate variables that are unique to the preterm group and were not collected for full-term mother-infant dyads. EGA: Estimated Gestational Age; PDA: Patent Ductus Arteriosis; IUGR: Intrauterine Growth Restriction; NEC: Necrotizing Enterocolitis; PVL/IVH: Periventricular Leukomalacia/Intervertebral Hemorrhage; ROP: PMA: Postmenstrual Age; Retinopathy of Prematurity; LOS: Length of Stay; TPN: Total Parenteral Nutrition; NIMV: Non-Invasive Mechanical Ventilation; CPAP: Continuous Positive Airway Pressure

^*p-value is from investigations of differences between full-term and preterm mother-infant dyads using independent samples t tests (for continuous variables) and chi-square analysis (for categorical variables). Bolded values indicate significance, p <.05