Table 1.

Proportions of sexual intercourse weeks over the 12-month study period, among all women and by sociodemographic characteristics and mental health symptoms

(N=952 women, 27,130 weeks)	Total %	% of weeks in which sexual intercourse occurred	p-value
All women	100	36
Sociodemographic and Reproductive Background Characteristics at Baseline
Age			0.60
18 years	41	36
19 years	50	37
20 years	9	36
Race/ethnicity			<0.001
White	59	38
Black	31	31
Hispanic	8	40
Other	2	43
Educational enrollment			<0.001
Not enrolled	22	48
High school	14	33
2 year college	29	36
4 year college	28	30
High school drop-out	8	48
Employment status			<0.001
Employed	50	41
Unemployed	50	32
Receiving public assistance			<0.001
Yes	27	43
No	73	35
Childhood family structure			<0.001
2 parents (biological/step)	52	34
1 parent only	40	38
Other	8	42
Mother's age at first birth			<0.001
<20 years old	37	42
≥20 years old	63	34
Religious service attendance			<0.001
Never	22	42
< weekly	52	42
≥ weekly	26	22
Relationship status			<0.001
Married	2	74
Engaged	7	69
Committed relationship	48	50
Casual/sexual relationship	16	29
None	27	12
Cohabiting status			<0.001
Cohabiting	17	69
Not cohabiting	83	31
Lifetime number of sexual partners			<0.001
0	23	5
1	17	46
2	13	45
≥3	46	53
Age at coitarche			<0.001
≥ 16 years	51	52
> 16 years	49	24
Ever had sex without using birth control			<0.001
Yes	48	53
No	52	25
History of pregnancy			<0.001
Yes	22	51
No	78	34
Mental Health Symptoms
Moderate/severe stressa			<0.001
Yes (≥9pts PSS-4)	23	43
No (<9pts PSS-4)	77	35
Moderate/severe depressionb			<0.001
Yes (≥4pts CESD)	24	40
No (<4pts CESD)	76	35

N= 952 women (27,130 weekly journals). Results presented as proportions (%) of weeks of sexual intercourse. P-values are from unadjusted Chi-square comparing proportions across sociodemographic and reproductive characteristics and mental health symptoms. P-values significant for two-tailed alpha at <0.05*, <0.01**, and <0.001***;^p-value marginal at p<0.10. Stress, depression, and covariates were measured at baseline. Sexual intercourse measured each week.

^aPerceived Stress Scale - 4 (PSS-4) - 9-point cut-off for moderate/severe stress symptoms.

^bCenter for Epidemiologic Studies – Depression Scale (CES-D-5) – 4 point cut-off for moderate/severe depression symptoms. Results for associations between stress and depression and sexual intercourse also similar when modeled as a 4-level categorical combined mental health symptom variable (no symptoms, moderate/severe stress symptoms only, moderate/severe depression symptoms only, or comorbid stress and depression symptoms).