Table 2.

Results from multinomial logistic regression showing the contributions of birth age (T/PT), age (7 vs 17), and lesion status (C/L) to IMPAS. Terms were more likely to aspirate than preterms, and we found no effect of age or lesion on rates of aspiration.

	T/PT odds	Age odds	C/L odds	T/PT p	Age p	C/L p
3	−3.42	0.05	−0.29	<0.001	0.92	0.46
7	−4.64	−0.65	−1.03	<0.001	0.29	0.09

Negative odds ratios indicate that the compared group is less likely to experience a three or seven than the reference group (control, term, seven).