Table 1. Open in new tab Factors...

Variable	Single-predictor Model	Multi-predictor Model
Age, per year	1.065 (1.034, 1.098)	<.001	1.060 (1.033, 1.091)	<.001
Female or transgender vs male	1.750 (.528, 5.810)	.354
Race/Ethnicity		.704
ȃWhite, non-Hispanic	1 (reference)
ȃBlack, non-Hispanic	1.949 (.312, 12.659)
ȃAsian, non-Hispanic	0.807 (.113, 5.624)
ȃHispanic	0.866 (.298, 2.480)
Positive screen, any drugs	0.478 (.237, .965)	.040
Number of drugs	0.589 (.432, .801)	.001
Positive methamphetamine screen	0.162 (.065, .397)	<.001	0.198 (.087, .444)	<.001
Unemployed/retired/disabled	0.879 (.401, 1.932)	.742
Transient or homeless	0.431 (.085, 2.201)	.305
Global PSQI score, per point	0.977 (.875, 1.091)	.670
Self-efficacy, per point	0.921 (.369, 2.321)	.857
Habitual self-control, per point	1.390 (.697, 2.811)	.343
HIV risk perception (PRHS 8-item), per point	1.010 (.952, 1.072)	.730
PHQ-8 total, per point	0.950 (.890, 1.014)	.118
Depressed mood (4-level), per level	0.696 (.446, 1.081)	.105	0.710 (.489, 1.028)	.069
Cumulative time on study, per week	0.899 (.876, .923)	<.001	0.903 (.878, .929)	<.001

Variable

Single-predictor Model

Multi-predictor Model

OR (95% CI)

P Value

OR (95% CI)

P Value

Age, per year

1.065 (1.034, 1.098)

<.001

1.060 (1.033, 1.091)

<.001

Female or transgender vs male

1.750 (.528, 5.810)

.354

Race/Ethnicity

.704

ȃWhite, non-Hispanic

1 (reference)

ȃBlack, non-Hispanic

1.949 (.312, 12.659)

ȃAsian, non-Hispanic

0.807 (.113, 5.624)

ȃHispanic

0.866 (.298, 2.480)

Positive screen, any drugs

0.478 (.237, .965)

.040

Number of drugs

0.589 (.432, .801)

.001

Positive methamphetamine screen

0.162 (.065, .397)

<.001

0.198 (.087, .444)

<.001

Unemployed/retired/disabled

0.879 (.401, 1.932)

.742

Transient or homeless

0.431 (.085, 2.201)

.305

Global PSQI score, per point

0.977 (.875, 1.091)

.670

Self-efficacy, per point

0.921 (.369, 2.321)

.857

Habitual self-control, per point

1.390 (.697, 2.811)

.343

HIV risk perception (PRHS 8-item), per point

1.010 (.952, 1.072)

.730

PHQ-8 total, per point

0.950 (.890, 1.014)

.118

Depressed mood (4-level), per level

0.696 (.446, 1.081)

.105

0.710 (.489, 1.028)

.069

Cumulative time on study, per week

0.899 (.876, .923)

<.001

0.903 (.878, .929)

<.001

Variable	Single-predictor Model	Multi-predictor Model
Age, per year	1.065 (1.034, 1.098)	<.001	1.060 (1.033, 1.091)	<.001
Female or transgender vs male	1.750 (.528, 5.810)	.354
Race/Ethnicity		.704
ȃWhite, non-Hispanic	1 (reference)
ȃBlack, non-Hispanic	1.949 (.312, 12.659)
ȃAsian, non-Hispanic	0.807 (.113, 5.624)
ȃHispanic	0.866 (.298, 2.480)
Positive screen, any drugs	0.478 (.237, .965)	.040
Number of drugs	0.589 (.432, .801)	.001
Positive methamphetamine screen	0.162 (.065, .397)	<.001	0.198 (.087, .444)	<.001
Unemployed/retired/disabled	0.879 (.401, 1.932)	.742
Transient or homeless	0.431 (.085, 2.201)	.305
Global PSQI score, per point	0.977 (.875, 1.091)	.670
Self-efficacy, per point	0.921 (.369, 2.321)	.857
Habitual self-control, per point	1.390 (.697, 2.811)	.343
HIV risk perception (PRHS 8-item), per point	1.010 (.952, 1.072)	.730
PHQ-8 total, per point	0.950 (.890, 1.014)	.118
Depressed mood (4-level), per level	0.696 (.446, 1.081)	.105	0.710 (.489, 1.028)	.069
Cumulative time on study, per week	0.899 (.876, .923)	<.001	0.903 (.878, .929)	<.001

Table 1.

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Factors Associated With Daily Confirmed Doses, Longitudinal Mixed-Effects Logistic Regression

Variable	Single-predictor Model		Multi-predictor Model
Variable	OR (95% CI)	P Value	OR (95% CI)	P Value
Age, per year	1.065 (1.034, 1.098)	<.001	1.060 (1.033, 1.091)	<.001
Female or transgender vs male	1.750 (.528, 5.810)	.354
Race/Ethnicity		.704
ȃWhite, non-Hispanic	1 (reference)
ȃBlack, non-Hispanic	1.949 (.312, 12.659)
ȃAsian, non-Hispanic	0.807 (.113, 5.624)
ȃHispanic	0.866 (.298, 2.480)
Positive screen, any drugs	0.478 (.237, .965)	.040
Number of drugs	0.589 (.432, .801)	.001
Positive methamphetamine screen	0.162 (.065, .397)	<.001	0.198 (.087, .444)	<.001
Unemployed/retired/disabled	0.879 (.401, 1.932)	.742
Transient or homeless	0.431 (.085, 2.201)	.305
Global PSQI score, per point	0.977 (.875, 1.091)	.670
Self-efficacy, per point	0.921 (.369, 2.321)	.857
Habitual self-control, per point	1.390 (.697, 2.811)	.343
HIV risk perception (PRHS 8-item), per point	1.010 (.952, 1.072)	.730
PHQ-8 total, per point	0.950 (.890, 1.014)	.118
Depressed mood (4-level), per level	0.696 (.446, 1.081)	.105	0.710 (.489, 1.028)	.069
Cumulative time on study, per week	0.899 (.876, .923)	<.001	0.903 (.878, .929)	<.001

Variable	Single-predictor Model		Multi-predictor Model
Variable	OR (95% CI)	P Value	OR (95% CI)	P Value
Age, per year	1.065 (1.034, 1.098)	<.001	1.060 (1.033, 1.091)	<.001
Female or transgender vs male	1.750 (.528, 5.810)	.354
Race/Ethnicity		.704
ȃWhite, non-Hispanic	1 (reference)
ȃBlack, non-Hispanic	1.949 (.312, 12.659)
ȃAsian, non-Hispanic	0.807 (.113, 5.624)
ȃHispanic	0.866 (.298, 2.480)
Positive screen, any drugs	0.478 (.237, .965)	.040
Number of drugs	0.589 (.432, .801)	.001
Positive methamphetamine screen	0.162 (.065, .397)	<.001	0.198 (.087, .444)	<.001
Unemployed/retired/disabled	0.879 (.401, 1.932)	.742
Transient or homeless	0.431 (.085, 2.201)	.305
Global PSQI score, per point	0.977 (.875, 1.091)	.670
Self-efficacy, per point	0.921 (.369, 2.321)	.857
Habitual self-control, per point	1.390 (.697, 2.811)	.343
HIV risk perception (PRHS 8-item), per point	1.010 (.952, 1.072)	.730
PHQ-8 total, per point	0.950 (.890, 1.014)	.118
Depressed mood (4-level), per level	0.696 (.446, 1.081)	.105	0.710 (.489, 1.028)	.069
Cumulative time on study, per week	0.899 (.876, .923)	<.001	0.903 (.878, .929)	<.001

Subject specific ORs and 95% CIs reported. Intent-to-treat analysis, all follow-up days included.

CIs and P values from likelihood ratio test. CIs for race/ethnicity are Bonferroni-corrected. Depressed mood from question 2 of PHQ-8.

Abbreviations: CI, confidence interval; HIV, human immunodeficiency virus; OR, odds ratio; PSQI, Pittsburg Sleep Quality Index.

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