Table 2. Multivariate predictor for the cost of hospitalization among newborn with neonatal abstinence syndrome.

Variable	Beta co-efficient, 95% Confidence Interval	P-value
Length of stay; one-day increase ($, Unadjusted)	1713 (1668 - 1758)	<0.0001
Length of stay; one-day increase ($, Adjusted)	1685 (1639 - 1731)	<0.0001
Hierarchical regression adjusted for gender, race, gestational age, low birth weight, respiratory complications, feeding complication, sepsis, seizure, hospital region, insurance type, hospital location, and teaching status, hospital bed-size