Sample characteristics
| Variable | |
| n | 442 |
| Age | |
| Mean (SD) | 48.97 (12.96) |
| Gender (%) | |
| Male | 15 |
| Female | 85 |
| ICD-10 diagnostic category of index condition (%) | |
| Certain infectious and parasitic diseases | 1 |
| Neoplasms | 25 |
| Diseases of the blood and blood-forming organs and immune mechanism disorders | 5 |
| Endocrine, nutritional and metabolic diseases | 6 |
| Mental and behavioural disorders | 3 |
| Diseases of the nervous system | 42 |
| Diseases of the ear and mastoid process | 0 |
| Diseases of the circulatory system | 3 |
| Diseases of the respiratory system | 3 |
| Diseases of the digestive system | 1 |
| Diseases of the skin and subcutaneous tissue | 1 |
| Diseases of the musculoskeletal system and connective tissue | 6 |
| Diseases of the genitourinary system | 0 |
| Congenital malformations, deformations and chromosomal abnormalities | 1 |
| Comorbidities (%) | |
| Arthritis | 38 |
| Asthma | 19 |
| Back pain | 58 |
| Cancer (now or in the past) | 31 |
| Depression | 52 |
| Diabetes | 10 |
| Heart disease | 10 |
| High blood pressure | 31 |
| Insomnia | 43 |
| Kidney disease | 5 |
| Liver disease | 3 |
| Lung disease | 11 |
| Stroke | 2 |
| Ulcer or stomach disease | 13 |
| Education (%) | |
| High school or less | 14 |
| Some college | 38 |
| College degree | 27 |
| Graduate degree | 20 |
| Missing | 0 |
| Father’s education | |
| High school or less | 48 |
| Some college | 22 |
| College degree | 14 |
| Graduate degree | 11 |
| Missing | 5 |
| Mother’s education | |
| High school or less | 49 |
| Some college | 30 |
| College degree | 11 |
| Graduate degree | 8 |
| Missing | 2 |
| Marital status (%) | |
| Never married | 15 |
| Married | 60 |
| Cohabitation/domestic partnership | 7 |
| Separated | 2 |
| Divorced | 13 |
| Widowed | 2 |
| Missing | 1 |
| Living Situation* (%) | |
| Spouse/partner | 69 |
| Other relative (children, sibling, parent) | 44 |
| Friend/companion | 4 |
| Pet(s) | 48 |
| Alone | 11 |
| Other | 1 |
| Income, US$ (%) | |
| Less than 15 000 | 11 |
| 15 001–30 000 | 14 |
| 30 001–50 000 | 17 |
| 50 001–100 000 | 27 |
| 100 001–150 000 | 13 |
| 150 001–200 000 | 4 |
| Over 200 000 | 2 |
| Missing | 12 |
| Difficulty paying bills (%) | |
| Extremely difficult | 28 |
| Very difficult | 16 |
| Somewhat difficult | 24 |
| Slightly difficult | 12 |
| Not difficult at all | 16 |
| Missing | 3 |
| Occupational complexity (O*NET job zone) (%) | |
| 1: Little or no preparation needed | 5 |
| 2: Some preparation needed | 23 |
| 3: Medium preparation needed | 24 |
| 4: Considerable preparation needed | 22 |
| 5: Extensive preparation needed | 7 |
| Missing | 19 |
*May add up to more than 100% because respondents were allowed to check all that apply. ICD-10, international statistical classification of diseases and related health problems. - 10th revision, edition 2010.