TABLE 1.

Demographic and Gestational Information by Recurrence Group

Variable	Total		No Recurrence		Early Recurrence (< 4 Weeks Postpartum)		Later Recurrence (> 4 Weeks Postpartum)		FE; p
	n	%	n	%	n	%	n	%
Age (in years)
≤ 30	24	47	16	50	0	0	8	57	5.0; .10
> 30	27	53	16	50	5	100	6	43
SES
Low and low middle	30	59	18	56	2	40	10	71	1.8; .43
Middle to upper	21	41	14	44	3	60	4	29
Marital status
Married or cohabitating	48	94	30	94	5	100	13	93	0.5; 1.00
Not married	3	6	2	6	0	0	1	7
Race
Non-White	3	6	2	6	0	0	1	7	0.5; 1.00
White	48	94	30	94	5	100	13	93
Parity
> 2nd baby	13	26	9	28	0	0	4	29	1.5; .50
2nd baby	38	75	23	72	5	100	10	71
RCT drug group
Nortriptyline	26	51	15	47	3	60	8	57	0.7; .77
Placebo-nortriptyline	25	49	17	53	2	40	6	43
C-section delivery
No	43	86	28	90	3	60	12	86	3.2; .19
Yes	7	14	3	10	2	40	2	14
Any baby problemsa
No	38	76	20	65	5	100	13	93	5.2; .06
Yes	12	24	11	35	0	0	1	7
	M	SD	M	SD	M	SD	M	SD	KW; p
Days from 36-week gestation to delivery	30.82	12.49	32.41	12.69	29.40	11.67	27.71	12.51	1.3; .53
Birth weight (kilograms)	3.46	0.53	3.47	0.49	4.15	0.68	3.26	0.51	4.3; .11
21–HRSD (36 weeks)	6.00	4.00	6.00	4.00	5.00	4.00	7.00	4.00	0.7; .71
21–HRSD (Week 4)	6.04	4.41	6.09	4.26	na	na	6.36	5.27	0.4; .80
PSQI (36 weeks)	8.00	3.00	7.00	3.00	5.00	0.00	10.0	4.00	9.8; <.05
PSQI (Week 4)	7.00	3.00	6.00	3.00	na	na	8.00	3.00	5.2; <.05

Note. FE = Fischer’s exact test; SES = socioeconomic status; RCT = randomized clinical trial; KW = Kruskal–Wallis test; 21–HRSD = 21-item Hamilton Rating Scale for Depression.

^aAny baby problems includes gestational age < 37 or > 41 (n = 5), APGAR score < 6 at 1 min post delivery (n = 3), treatment for sepsis (n = 2), need for volume expansion (n = 1), and other unspecified problems (n = 3).