Table 2.

Schedule for study enrolment, intervention and assessments

Activity/assessment	Recruitment	Enrolment	Follow-up30days	Follow-up90days	Follow-up180days
Time point	T−1	T0	T1	T2	T3
Prescreening (positive PCR test)	x
Information to e-Boks	x
Informed e-consent		x
Eligibility screening		x
Baseline questionnaire		x
Randomisation/group allocation		x
Video guides		x
PEP flute deliverance		x (+3 days)
Self-report of symptoms (CAT)			x (day 1-30)
Intervention group: PEP usage			x (day 1-30)
Compliance assessment			x (day 30)
Outcome assessment			x	x	x
Baseline/outcome variables*
Age and sex (register data)	x
Symptoms within last week		x	x	x	x
Cohabitation		x
Education		x
Health literacy (two dimensions)		x
Profession and employment		x
Self-rated health (one item)		x	x	x	x
Weight and height		x
Smoking and alcohol		x
Comorbidity self-reported		x
Comorbidity (register data)			x
CAT score		x	x	x	x
Hospital admission (register data)			x		x
Medication (register data)			x		x
Death (register data)			x		x
Serious adverse event	As needed throughout protocol

*All baseline and outcome variables are collected as questionnaire data unless stated otherwise.

CAT, COPD Assessment Test; PEP, positive expiratory pressure.