Table 2.

Comparisons of rates of select conditions and procedures among live, singleton newborns born at ≥37 weeks of gestational age in hospitals in the USA in 2002 and 2011, by presence of small for gestational age (SGA) code

	2002				2011
	SGA (n = 44,161)	Non SGA (n = 3,727,962)			SGA (n = 51,956)	Non SGA (n = 3,386,269)
	Ratea	Ratea	aORb	(95 % CI)	Ratea	Ratea	aORb	(95 % CI)
Birth traumac	31.9	33.5	0.9	(0.8, 1.1)	32.0	30.7	1.0	(0.9, 1.2)
Seizures, CNS diseases and feeding disorders	61.8	10.6	5.5	(4.9, 6.2)	74.3	15.6	4.7	(4.1, 5.3)
Perinatal complicationsd	90.9	33.4	2.8	(2.4, 3.1)	102.4	42.1	2.5	(2.2, 2.8)
Congenital anomalies	100.4	54.3	1.9	(1.8, 2.1)	134.2	75.4	1.9	(1.7, 2.1)
Metabolic disorders	108.0	19.5	5.6	(5.0, 6.2)	114.1	24.1	4.9	(4.4, 5.5)
Neonatal abstinence syndrome	5.3	0.8	5.5	(4.0, 7.7)	20.9	3.4	5.5	(4.7, 6.5)
Respiratory distress and other respiratory conditions	115.8	49.4	2.3	(2.1, 2.5)	117.4	50.9	2.3	(2.1, 2.5)
Congenital/neonatal infection	35.2	12.1	2.6	(2.3, 3.0)	37.7	11.7	2.9	(2.5, 3.3)
Intubation and CPAP	37.4	12.9	2.5	(2.1, 3.0)	39.1	14.4	2.4	(2.0, 2.9)
In-hospital death	2.3	0.6	2.7	(1.7, 4.2)	2.5	0.5	3.0	(2.0, 4.4)

^aRates are per 1000 births

^bAdjusted for sex, mode of delivery, expected payer and presence of congenital anomalies

^cBirth trauma includes mechanical or anoxic trauma incurred by or to the infant during labor or delivery, and physical injuries (such as brain damage) received during birth, mostly in, but not limited to, breech births, instrument deliveries, neonatal anoxia

^dPerinatal complications include maternal conditions and complications, complications of the placenta, cord and membranes and other complications of labor and delivery

CNS Central nervous system

CPAP Continuous positive airway pressure