Table 1.

Domains, measures, tools, and time points for data collection for the Codeine Cohort study.

Domain		Measure	Baseline	T1a	T2b	T3c
Demographics
	Age, sex, accommodation	—	x
	Education, employment	—		x
Health service use
	Use of physician, pharmacist, and emergency department for codeine	—	x	x	x	x
Pain
	Pain and coping	PSEQd	x	x	x	x
	Physical functioning	PEGe	x	x	x	x
Mental health
	Depression	PHQ- 9f	x	x	x	x
	Anxiety	GAD-7g	x	x	x	x
	Codeine use and dependence	AUDADIS-5 CIDIh: substance abuse module	x			x
		SDSi	x	x	x	x
		CDSj	x	x	x	x
Treatment
	Current medication	Self-complete 7-day medication diary	x	x	x	x
	Nonmedication treatment options	—	x	x	x	x

^aT1: 1 month after rescheduling.

^bT2: 4 months after rescheduling.

^cT3: 12 months after rescheduling.

^dPSEQ: Pain Self-Efficacy Questionnaire.

^ePEG: Pain Intensity, Enjoyment of Life and General Activity Assessment Tool.

^fPHQ-9: Patient Health Questionnaire, 9-item.

^gGAD-7: Generalized Anxiety Disorder 7-item Scale.

^hAUDADIS-5 CIDI: Alcohol Use Disorder and Associated Disabilities Interview Schedule–5 Composite International Diagnostic Interview.

ⁱSDS: Severity of Dependence Scale.

^jCDS: Codeine Dependence Scale.