Table 2.

Potential modifiers of post-discharge pulmonary morbidity by treatment group (late surfactant versus control)

	Follow-up cohort (n=432)*	Late surfactant (n=211)	Control (n=221)	P value
Breast milk (full or partial) anticipated	195 (45.1)	91 (43.1)	104 (47.1)	0.41
Furry pet in home	178 (41.2)	85 (40.3)	93 (42.1)	0.70
Young child exposure anticipated	228 (52.8)	115 (54.5)	113 (51.1)	0.48
Potential ETS exposure	105 (24.3)	51 (24.2)	54 (24.4)	0.95
Private insurance	170/430 (39.5)	78/210 (37.1)	92/220 (41.8)	0.32
Asthma in parent	77/422 (18.2)	30/207 (14.5)	47/215 (21.9)	0.05

Data are n/N (%)

^*Missing data for infants not discharged to their biological parents’ care (family history), and those discharged from non-study hospitals

P value by chi-square

ETS, environmental tobacco smoke

“Young child exposure anticipated” was classified as Yes if caregiver reported another child < 5 years in the home or anticipated a young child at day care.

“Potential ETS exposure” was classified as Yes if caregiver reported 1) a parent smokes, 2) there is a smoker living in the home, 3) smoking is allowed in home, or 4) the child will travel in vehicle where smoking is permitted.

“Breast milk anticipated” was classified as Yes if caregiver reported either a breast milk only diet or combination of breast milk and formula at discharge.