Table 1.

Descriptive Statistics of Sample and Main Variables used in the Study

	Total Sample (N=1322)			Whites (n=475)			Blacks (n=847)			* p<.05
Continuous Variables	Mean	SD	Range	Mean	SD	Range	Mean	SD	Range
Maternal age at recruitment	26.19	5.46	16 –40	28.64	4.94	16 – 39	24.83	5.25	16 –40	*
Gestational age, time 1 assessment (weeks)	23.07	3.07	16.0 – 29.6	23.01	3.13	16.1 – 29.6	23.10	3.02	16.0 – 28.4	ns
Gestational age, time 2 assessment (weeks)	31.74	1.83	22.4 – 39.2	31.91	1.59	25.6 – 39.2	31.64	1.94	22.4 – 39.2	*
Income/education composite score	0.03	0.92	−0.9 – 2.5	0.70	0.91	−0.9 – 2.5	−0.35	0.69	−0.9 – 1.9	*
Parity	2.56	1.63	1 – 12	2.25	1.34	1 – 10	2.74	1.74	1 – 12	*
Pre-pregnancy Body Mass Index (BMI)	27.56	7.50	14.2 – 72.4	25.73	5.98	14.2 – 50.8	28.59	8.06	14.2 – 72.4	*
Brief Symptom Inventory depression t-score	48.27	7.67	36 – 74	48.07	7.52	36 – 74	48.39	7.77	36 – 74	ns
Social support summary score	3.58	1.87	0 – 9	4.39	1.91	0 – 9	3.13	1.69	0 – 9	*
Maternal childhood traumatic events	0.52	0.78	0 – 3	0.42	0.73	0 – 3	0.58	0.80	0 – 3	*
Maternal traumatic life events in adulthood	3.16	2.33	0 – 14	3.04	2.30	0 – 14	3.23	2.34	0 – 12	ns
Interpersonal violence victimization	0.99	0.89	0 – 4	0.82	0.69	0 – 4	1.08	0.97	0 – 4	*
Neighborhood crime and deprivation	−0.03	0.96	−2.1 – 1.7	−0.83	0.72	−2.1 – 1.4	0.41	0.78	−2.1 – 1.7	*
pCRH level, time 1	58.53	74.91	1.1 – 1443.0	73.55	75.87	4.3 – 788.9	50.21	73.14	1.1 – 1443.0	*
pCRH level, time 2	364.39	425.63	4.5 – 6385.0	451.41	424.73	18.2 – 3515.0	316.30	418.87	4.5 – 6385.0	*
pCRH rate of rise from time 1 to time 2	305.86	392.72	3.4 – 6276.0	377.87	386.65	13.5 – 3304.0	266.09	390.86	3.4 – 6276.0	*
Gestational age (at birth)	38.95	1.34	31.5 – 42.0	38.96	1.43	28.5 – 42.0	38.65	2.10	22.4 – 41.6	*
Birth weight (grams)	3277.8	498.1	1227.0 – 4954.0	3420.7	525.3	930.0 – 4954.0	3128.4	561.2	200.0 – 4685	*
Categorical Variables	N (%)			N (%)			N (%)
Marital status
Married/living together with partner	764	(57.7%)		427	(89.9%)		337	(39.8%)		*
Single/widowed/divorced/separated/never married	560	(35.3%)		48	(10.1%)		510	(60.2%)
Gestational diabetes										ns
Yes	75	(5.7%)		33	(6.9%)		42	(5.0%)
No	1235	(94.3%)		442	(93.1%)		791	(95.0%)
Gestational hypertension or preeclampsia										ns
Yes	124	(9.5%)		38	(8.0%)		85	(10.2%)
No	1185	(90.5%)		436	(92.0%)		748	(89.8%)
Tobacco use during pregnancy
Yes	176	(13.3%)		66	(13.9%)		109	(12.9%)		ns
No	1148	(86.7%)		409	(86.1%)		738	(87.1%)

Note:

^*p<.05 column indicates differences between Whites and Blacks.

Ns= Non-statistically significant.