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. Author manuscript; available in PMC: 2023 Nov 1.
Published in final edited form as: J Reprod Infant Psychol. 2021 Apr 17;40(5):465–478. doi: 10.1080/02646838.2021.1916815

Table 5.

Associations between mental health measures and number of substances used to cope by pregnant people, over time (Time 1 n = 83, Time 2 n = 66).

Measure/Covariate Standardised Unstandardised
β 95% CI B 95% CI
Pre-COVID Mental/Emotional Health with Time 1 0.41 0.22–0.59*** 0.23 0.12–0.35***
Substance Use
Age −0.20 −0.39–0.00 −0.02 −0.05–0.00
Race/Ethnicity 0.10 −0.10–0.30 0.13 −0.14–0.40
Income −0.26 −0.46 – −0.06* −0.32 −0.58–0.07*
Employment Status 0.16 −0.04–0.37 0.21 −0.05–0.48
Pre-COVID Mental/Emotional Health with Time 2 0.46 0.25–0.67*** 0.25 0.13–0.37***
Substance Use
Age 0.00 −0.23–0.23 0.00 −0.02–0.02
Race/Ethnicity 0.14 −0.09–0.37 0.16 −0.11–0.44
Income −0.18 −0.41–0.05 −0.19 −0.44–0.06
Employment Status −0.04 −0.28–0.19 −0.05 −0.31–0.21
Time 1 Mental and Emotional Health with Time 2 0.14 0.04–0.24** 0.14 0.11–0.56**
Substance Use
Age 0.09 −0.15–0.33 0.01 −0.01–0.03
Race/Ethnicity 0.08 −0.16–0.32 0.10 −0.19–0.38
Income −0.09 −0.44–0.05 −0.21 −0.48–0.05
Employment Status −0.20 −0.34–0.15 −0.10 −0.37–0.17
Time 1 Perceived Stress Scale with Time 2 Substance 0.35 0.13–0.57** 0.02 0.01–0.04**
Use
Age 0.10 −0.15–0.34 0.01 −0.01–0.03
Race/Ethnicity 0.01 −0.23–0.25 0.01 −0.27–0.29
Income −0.11 −0.36–0.14 −0.12 −0.39–0.15
Employment Status −0.16 −0.41–0.09 −0.18 −0.46–0.10
Time 1 Edinburg Postnatal Depression Scale with Time 0.27 0.04–0.50* 0.02 0.00–0.04*
2 Substance Use
Age 0.10 −0.15–0.35 0.01 −0.01–0.03
Race/Ethnicity 0.04 −0.21–0.28 0.04 −0.24–0.33
Income −0.16 −0.41–0.09 −0.17 −0.44–0.10
Employment Status −010 −0.36–0.16 −0.11 −0.39–0.17

Standardised regression coefficients are reported for direct comparison of strength of relationship between the mental health variables and substances use. Unstandardised regression coefficients reflect the difference in number of substances used for each 1 unit increase in the scale score. Linear regression was used to determine the longitudinal associations while controlling for age, ethnicity, race, income and employment status.

*

p < 0.05,

**

p < 0.01,

***

p < 0.001.