Table 1 Descriptive characteristics for HCs and individuals with MUD

From: Individuals with methamphetamine use disorder show reduced directed exploration and learning rates independent of an aversive interoceptive state induction

Questionnaire

HCs (N = 58)

MUD (N = 56)

Statistical Test

p

Cohen’s d (w for Sex)

Sex

42 F, 16 M

20 F, 36 M

\({\chi }^{2}\)(1) = 14.02

<0.001

0.35

Age

35.41 (13.08)

36.75 (7.27)

t(89.8) = −0.68

0.500

−0.13

Working Memory1

52.43 (8.01)

45.70 (10.70)

t(96.2) = 3.70

<0.001

0.71

PHQ-9

1.66 (2.27)

4.30 (4.00)

t(86.3) = −4.32

<0.001

−0.81

STAI-Trait

29.17 (7.40)

39.07 (9.49)

t(104.0) = −6.20

<0.001

−1.16

UPPS-P Total

116.78 (17.68)

145.05 (20.52)

t(108.4) = −7.87

<0.001

−1.48

CRT-72

3.33 (2.18)

0.84 (1.18)

t(88.8) = 7.60

<0.001

1.42

DAST

–

7.70 (1.90)

–

–

–

MAWQ Total

–

7.79 (7.34)

–

–

–

DSQ3

–

92.87 (34.21)

–

–

–

  1. Note: Superscripts indicate where data were only available for a subset of participants because these measures were added part-way into the study.1HCs = 56, MUD = 53, 2HCs = 58, MUD = 55, 3MUD = 39. Bolding is used to highlight statistically significant results. All t-tests were two-sided. The columns labeled “HCs” and “MUD” show the means and standard deviations for each measure.
  2. Working Memory List Sorting Working Memory Test from the NIH Toolbox Cognition Battery, PHQ-9 Patient Health Questionnaire (Depression), STAI State-Trait Anxiety Inventory, UPPS-P Impulsive Behavior Scale, CRT-7 Cognitive Reflectiveness Test (number of correct answers), DAST Drug Abuse Screening Test, MAWQ Methamphetamine Withdrawal Questionnaire, DSQ Desire for Speed (Methamphetamine) Questionnaire.
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