Table 2 Measures and survey times

Screening question: Diagnosis “asthma” made by a physician, before the start of the COVID 19 pandemic in march 2020^1,2

Self-developed

X

Screening question: Employed for at least six months in an employment relationship subject to social insurance contributions or civil servant¹

Self-developed

X

Screening question: Working at least 15 h a week¹

Self-developed

X

Demographic information^3,4

Self-developed

X

X

X

X

Asthma trigger

Self-developed

X

X

X

Sick days

Self-developed

X

X

Exacerbations

Partly adopted from “EPRA”⁵ -study [31]

X

X⁹

X

Information on treatment

Self-developed

X

X

Asthma self-management

Partly adopted from “EPRA”⁵-study [31]

X

X

X

Need for medical-occupational rehabilitation (MBOR)

Würzburger Screening [36]

X

X

X

Partly

Subjective prognosis of gainful employment

Brief Scale Measuring the Subjective Prognosis of Gainful Employment [34]

X

X

X

Information on occupation

Self-developed

X

X

Work satisfaction

Self-developed

X

X

X

Workability

First item from Work Ability Index [37]

X

X

X

Working conditions (related to asthma)

Determinants of Work-related Asthma Self-management Questionnaire [6]

X

X

X

Changes in working conditions

Self-developed

X

Asthma self-management at work (primary outcome T3)

Self-developed [6]

X

X

X

Behavioural intention regarding asthma self-management at work (primary outcome T2)

Self-developed

X

X

X

Workplace-related self-efficacy

Self-developed

X

X

X

Self-management-related knowledge (on “Asthma and Work”)

Self-developed

X

X

X

Job decision latitude

Copenhagen Psychosocial Questionnaire [38]

X

X

X

Social support at work

Copenhagen Psychosocial Questionnaire [38]

X

X

X

Asthma control

Asthma Control Test [32]

X

X

X

X

Quality of Life

Marks Asthma Quality of Life Questionnaire [33]

X

X

X

Visual analog scale from European Quality of Life 5 Dimensions Questionnaire [39]

X

X

X

COVID-19

Self-developed/partly adopted from COVIDOM-study⁶ [40]

X

X⁹

X

Further health aspects⁷

Partly adopted from “EPRA”⁵-study [31]

X

X

X

Depressiveness

Patient Health Questionnaire-2 [41]

X

X

X

Anxiety

Generalized Anxiety Disorder Questionnaire-2 [41]

X

X

X

Body Mass Index⁸

Weight, height

X

Lung function⁸

Forced expiratory volume in 1 s (FEV1), FEV1/vital capacity, total specific airway resistance, vital capacity, residual volume

X

X

Exercise capacity⁸

6-minute walk test [42]

X

X

Allergy⁸

Total immunoglobulin E (Ig E), specific Ig E-Screening (ImmunoCAP®)

X

Asthmatic inflammation⁸

Fractional exhaled nitric oxide (FeNO), Eosinophils/µl

X

Medication⁹

Asthma medication and changes

X

X