| Variable (corresponding theoretical dimension) . | Phrasing of item . | Response categories (‘vs.’ shows dichotomization) . | Dichotomized . |
|---|---|---|---|
| Lonelinessa (social isolation; cultural estrangement) | Do you feel lonely? | ‘Yes, very often’ and ‘Yes, rather often’ vs. ‘Yes, sometimes’ and ‘No’ | Yes |
| Feeling left out of things (social isolation; cultural estrangement) | How often do you feel left out of things? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Helplessness (powerlessness) | How often do you feel helpless? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Lack of confident relations with one's parents (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Mother, Father | ‘Very difficult’, ‘Difficult’ vs. ‘Easy’, ‘Very easy’, ‘Don't have or see this person’ | Yes |
| Lack of confident relations with one's friendsb (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Friends of the same sex, friends of the opposite sex | ‘Very difficult’, ‘Difficult’, ‘Easy’, ‘Very easy’, and ‘Do not have or see this person | No |
| Lack of educational plans for the futurec (meaninglessness) | What do you think you will be doing when you finish high school? | ‘College or University’, ‘Vocational or technical school’ and ‘Apprenticeship/trade’ vs. ‘Working’ and ‘Unemployed’. ‘Do not know’ was coded as missing | Yes (for use in correlation analyses) |
| Variable (corresponding theoretical dimension) . | Phrasing of item . | Response categories (‘vs.’ shows dichotomization) . | Dichotomized . |
|---|---|---|---|
| Lonelinessa (social isolation; cultural estrangement) | Do you feel lonely? | ‘Yes, very often’ and ‘Yes, rather often’ vs. ‘Yes, sometimes’ and ‘No’ | Yes |
| Feeling left out of things (social isolation; cultural estrangement) | How often do you feel left out of things? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Helplessness (powerlessness) | How often do you feel helpless? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Lack of confident relations with one's parents (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Mother, Father | ‘Very difficult’, ‘Difficult’ vs. ‘Easy’, ‘Very easy’, ‘Don't have or see this person’ | Yes |
| Lack of confident relations with one's friendsb (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Friends of the same sex, friends of the opposite sex | ‘Very difficult’, ‘Difficult’, ‘Easy’, ‘Very easy’, and ‘Do not have or see this person | No |
| Lack of educational plans for the futurec (meaninglessness) | What do you think you will be doing when you finish high school? | ‘College or University’, ‘Vocational or technical school’ and ‘Apprenticeship/trade’ vs. ‘Working’ and ‘Unemployed’. ‘Do not know’ was coded as missing | Yes (for use in correlation analyses) |
a: Excluded from index due to differential item functioning in relation to psychological symptoms.
b: Excluded from index due to insignificant correlation with both outcome measures.
c: Excluded from index due to insignificant correlations with the other five items.
| Variable (corresponding theoretical dimension) . | Phrasing of item . | Response categories (‘vs.’ shows dichotomization) . | Dichotomized . |
|---|---|---|---|
| Lonelinessa (social isolation; cultural estrangement) | Do you feel lonely? | ‘Yes, very often’ and ‘Yes, rather often’ vs. ‘Yes, sometimes’ and ‘No’ | Yes |
| Feeling left out of things (social isolation; cultural estrangement) | How often do you feel left out of things? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Helplessness (powerlessness) | How often do you feel helpless? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Lack of confident relations with one's parents (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Mother, Father | ‘Very difficult’, ‘Difficult’ vs. ‘Easy’, ‘Very easy’, ‘Don't have or see this person’ | Yes |
| Lack of confident relations with one's friendsb (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Friends of the same sex, friends of the opposite sex | ‘Very difficult’, ‘Difficult’, ‘Easy’, ‘Very easy’, and ‘Do not have or see this person | No |
| Lack of educational plans for the futurec (meaninglessness) | What do you think you will be doing when you finish high school? | ‘College or University’, ‘Vocational or technical school’ and ‘Apprenticeship/trade’ vs. ‘Working’ and ‘Unemployed’. ‘Do not know’ was coded as missing | Yes (for use in correlation analyses) |
| Variable (corresponding theoretical dimension) . | Phrasing of item . | Response categories (‘vs.’ shows dichotomization) . | Dichotomized . |
|---|---|---|---|
| Lonelinessa (social isolation; cultural estrangement) | Do you feel lonely? | ‘Yes, very often’ and ‘Yes, rather often’ vs. ‘Yes, sometimes’ and ‘No’ | Yes |
| Feeling left out of things (social isolation; cultural estrangement) | How often do you feel left out of things? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Helplessness (powerlessness) | How often do you feel helpless? | ‘Always’ and ‘Often’ vs. ‘Sometimes’, ‘Rarely’ and ‘Never’ | Yes |
| Lack of confident relations with one's parents (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Mother, Father | ‘Very difficult’, ‘Difficult’ vs. ‘Easy’, ‘Very easy’, ‘Don't have or see this person’ | Yes |
| Lack of confident relations with one's friendsb (social isolation) | How easy is it for you to talk to the following persons about things that really bother you? Friends of the same sex, friends of the opposite sex | ‘Very difficult’, ‘Difficult’, ‘Easy’, ‘Very easy’, and ‘Do not have or see this person | No |
| Lack of educational plans for the futurec (meaninglessness) | What do you think you will be doing when you finish high school? | ‘College or University’, ‘Vocational or technical school’ and ‘Apprenticeship/trade’ vs. ‘Working’ and ‘Unemployed’. ‘Do not know’ was coded as missing | Yes (for use in correlation analyses) |
a: Excluded from index due to differential item functioning in relation to psychological symptoms.
b: Excluded from index due to insignificant correlation with both outcome measures.
c: Excluded from index due to insignificant correlations with the other five items.
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