Table 1 Description of the variables of interest and in which cohorts they were obtained.
From: Participation and engagement in online cognitive testing
Variable | Cohorts | Scale | Description and notes |
|---|---|---|---|
Age | YH4, NT4, ST1 | Continuous | Age at the invitation to HUNT4, calculated by subtracting the birthdate registered in the Norwegian National Registry from the date of sending an invitation to the HUNT4 study |
Biological sex | YH4, NT4, ST1 | Nominal, Man/Woman | Obtained from Norwegian National Registry |
Education | YH4, NT4, ST1 | Ordinal, 3 values | Stratified into 3 categories: Primary: Primary and lower secondary school, 7–10 years depending on birth cohort; Secondary: Academic, vocational school or apprenticeship, 1–4 years; Tertiary: Bachelor or higher education |
Living alone or with a partner | NT4, ST1 | Nominal, 2 values | “Do you live with someone?”: 1. No, I live alone; 2. Yes, spouse or partner |
Occupationally active | NT4 | Nominal, no/yes | “Are you occupationally active?” |
Place of living: urban or rural | YH4, NT4, ST1 | Nominal, 2 values | Obtained from Norwegian National Registry |
Chronic illness or injury | NT4, ST1 | Nominal, no/yes | “Do you suffer from longstanding (at least 1 year) illness or injury of a physical or psychological nature that impairs your functioning in your daily life?” |
Conditions and diseases: myocardial infarction, diabetes, stroke or brain haemorrhage, cancer | NT4, ST1 | Nominal, no/yes | “Have you had, or do you have any of the following diseases?” Myocardial Infarction, Diabetes, Stroke or Brain Haemorrhage, Cancer |
Mental health problems | NT4, ST1 | Nominal, no/yes | “Have you had, or do you have mental health problems you sought help for?” |
HADS ≥ 11 | NT4, ST1 | Nominal, 2 values | The Hospital Anxiety and Depression Scale total score; or extrapolated score if 11, 12, or 13 out of 14 questions are answered. Stratified into: 1. HADS < 11; 2. HADS ≥ 11 |
Impairments: motor impairment, vision impairment, hearing impairment | YH4, NT4, ST1 | Ordinal, 4 values | YH4: “Do you have impairments of your functioning in any of the following areas?” Motor Impairment, Vision Impairment, Hearing Impairment NT4 and ST1: “If yes [longstanding illness that impairs your functioning], would you describe your impairment as slight, moderate or severe?”: 1. Not impaired; 2. Slightly impaired; 3. Moderately impaired; 4. Severely impaired |
Health | YH4, NT4, ST1 | Ordinal, 4 values | ”How is your health at the moment?”: 1. Poor; 2. Not so good; 3. Good; 4. Very good |
Learning disabilities: any, math, reading/writing, other | YH4 | Nominal, no/yes | “Do you have any learning disabilities? If yes, which disabilities?” |
Memory problems | NT4, ST1 | Ordinal, 3 values | “Do you have problems with your memory?”: 1. No; 2. Yes, some; 3. Yes, a lot |
Lifestyle satisfaction | NT4, ST1 | Ordinal, 4 values | “How satisfied are you with your lifestyle (diet, exercise, smoking and drinking habits)?” 1. Very satisfied; 2. Satisfied; 3. Less satisfied; 4. Not satisfied |
Smoking | YH4, NT4, ST1 | Nominal, 5 values | Smoking status: 1. Never smoked; 2. Ex daily smoker; 3: Current daily smoker; 4. Current occasional smoker; 5. Ex occasional smoker |
Alcohol drinking | NT4, ST1 | Nominal, no/yes | “Do you drink alcohol?” |
