Table II.

Mean BNBAS Cluster, Excitability, and Depression Scores Over the First 6 Weeks^a

	Drug		Comparison
Behavior cluster	M	SD	M	SD	Fb
Orientation
Birth	4.28	2.16	6.22	2.00	6.50d
2 weeks	6.32	1.98	6.99	1.82	0.31
4 weeks	7.29	1.05	6.74	2.36	0.28
6 weeks	7.57	1.02	7.77	0.95	0.17
Motor performance
Birth	4.83	0.72	5.37	0.66	3.08c
2 weeks	5.75	0.60	5.62	0.62	0.91
4 weeks	5.90	0.29	6.13	0.55	2.10
6 weeks	6.16	0.44	6.33	0.54	0.55
Range of state
Birth	3.77	0.66	4.10	0.77	1.40
2 weeks	3.85	0.62	3.79	0.85	0.34
4 weeks	4.14	0.52	4.10	0.67	0.01
6 weeks	4.01	0.95	4.17	0.71	0.12
State regulation
Birth	4.96	1.42	5.88	1.00	4.50d
2 weeks	5.28	0.92	5.06	1.41	0.03
4 weeks	4.45	1.29	4.39	1.11	0.17
6 weeks	4.18	1.18	4.30	0.80	0.02
Autonomic regulation
Birth	5.90	0.90	6.70	0.91	4.00d
2 weeks	6.47	0.83	7.32	0.88	9.28e
4 weeks	6.77	0.89	7.18	0.76	0.96
6 weeks	6.77	0.90	7.43	0.77	5.04d
Abnormal reflexes
Birth	2.15	1.53	1.15	1.09	3.79c
2 weeks	1.95	1.51	1.20	1.24	3.51c
4 weeks	1.83	1.22	1.64	1.21	0.59
6 weeks	2.47	1.84	2.55	1.85	0.03
Excitability
Birth	1.30	1.42	1.00	1.38	0.17
2 weeks	1.15	0.93	0.85	1.23	0.67
4 weeks	1.00	1.26	0.55	0.94	1.32
6 weeks	1.00	1.17	0.45	0.83	1.84
Depression
Birth	3.65	2.68	1.30	1.56	8.51e
2 weeks	0.90	1.41	1.35	1.56	2.08
4 weeks	0.65	0.81	1.50	1.85	1.23
6 weeks	0.90	1.00	0.95	0.76	0.43

^an = 20 for each group.

^bUnivariate ANCOVAs to compare scores of drug-exposed and comparison infants at each time period.

^cp < .10.

^dp < .05.

^ep < .01.