Table 2.

First-level effect estimates from two models

Effect†		Results for the following models:
		Model B	Model AB
Grand mean	Median	−3.463	−3.812
	95% CI	(−4.015, −3.255)	(−3.931, −3.521)
MR	Median	−0.7312	−0.7377
	95% CI	(−0.7541, −0.7100)	(−0.7993, −0.6712)
LBW	Median	−0.7652	−0.7686
	95% CI	(−0.7789, −0.7526)	(−0.7831, −0.7548)
IS	Median	−0.01868	−0.01873
	95% CI	(−0.02726, −0.01031)	(−0.02791, −0.00969)
MTU	Median	−0.6741	−0.7329
	95% CI	(−0.6900, −0.6591)	(−0.7649, −0.6982)
PT	Median	−0.5493	−0.5512
	95% CI	(−0.5633, −0.5351)	(−0.5702, −0.533)
MR × LBW	Median	0.1819	0.1837
	95% CI	(0.1700, 0.1935)	(0.1716, 0.1961)
MR × IS	Median	−0.01263	−0.01264
	95% CI	(−0.01875, −0.00658)	(−0.01884, −0.00623)
MR × MTU	Median	−0.1924	−0.1579
	95% CI	(−0.2076, −0.1785)	(−0.1788, −0.137)
MR × PT	Median	0.008638	0.01439
	95% CI	(−0.00458, 0.02165)	(0.001109, 0.02778)
LBW × IS	Median	−0.08882	−0.08856
	95% CI	(−0.09646, −0.08107)	(−0.09666, −0.08044)
LBW × MTU	Median	0.1844	0.1886
	95% CI	(0.1729, 0.1956)	(0.1777, 0.2000)
LBW × PT	Median	0.9077	0.9161
	95% CI	(0.8952, 0.9208)	(0.9025, 0.9298)
IS × MTU	Median	0.004782	0.00427
	95% CI	(5.49 × 10−6, 0.009607)	(−6.73 × 10−4, 0.009278)
IS × PT	Median	0.07691	0.07704
	95% CI	(0.06922, 0.08475)	(0.06903, 0.08492)
MTU × PT	Median	−0.04761	−0.0391
	95% CI	(−0.05984, −0.03526)	(−0.05055, −0.02775)
MR × LBW × MTU	Median	−0.05651	−0.05609
	95% CI	(−0.06663, −0.04676)	(−0.06584, −0.04614)
MR × LBW × PT	Median	−0.02172	−0.0208
	95% CI	(−0.03464, −0.00935)	(−0.03100, −0.01065)
MR × IS × PT	Median	−0.01193	−0.01199
	95% CI	(−0.01747, −0.00628)	(−0.01749, −0.00645)
MR × MTU × PT	Median	0.02444	0.0245
	95% CI	(0.013, 0.03611)	(0.0143, 0.03482)
LBW × IS × PT	Median	0.03118	0.03121
	95% CI	(0.02373, 0.03869)	(0.02393, 0.03868)
LBW × MTU × PT	Median	−0.06719	−0.06723
	95% CI	(−0.0799, −0.05373)	(−0.07728, −0.05704)
MR × LBW × MTU × PT	Median	0.01125	0.01104
	95% CI	(8.48 × 10−4, 0.02155)	(0.001786, 0.02126)

^†MR, maternal race; IS, infant’s sex; MTU, maternal tobacco use; PT, preterm.