Table 1 Variables, measuring instruments and data sources
Morbidity | Measuring instrument | Data source |
|---|---|---|
Diagnoses | ICD-10 codes | chart review |
Diseases | self-developed questionnaire | GP interview |
self-developed questionnaire | patient interview | |
Four-Dimensional Symptom Questionnaire (4DSQ) [11] | patient interview | |
Geriatric Depression Scale (GDS) [12] | patient interview | |
Clinical Dementia Rating (CDR) [13] | rated by interviewer | |
Functional Status | ||
Activities of daily living | Barthel Index [22] | patient interview |
Instrumental Activities of Daily Living (IADL) Scale [23] | patient interview | |
Motor skills | FFB-Mot [24] | patient interview |
Vision and hearing | 2 items rated on a 4 point scale | patient interview |
Cognitive impairment | CERAD [25] subtests word list and animal naming | cognitive tests by interviewer |
Letter Digit Substitution Test (LDST) [26] | cognitive tests by interviewer | |
Pain | Graded Chronic Pain Scale (GCPS) [27] | patient interview |
Health-related quality of life | EuroQoL (EQ-5D) Scale [28] | patient interview |
Resources/Risk Factors | ||
Physical risk factors | Body-Mass-Index and Waist-to-Hip-Ratio | physical checkup by GP |
Physical activity | International Physical Activities Questionnaire (IPAQ) [29] | patient interview |
Nutrition | 12 items for frequency and portion size of nutriments | patient interview |
Alcohol use | AUDIT-C [30] | patient interview |
total amount of alcohol consumption per week | patient interview | |
Smoking behavior | 9 items indicating current smoking status and pack years | patient interview |
General self-efficacy | General Self-efficacy Scale [31] | patient interview |
Social support | F-SOZU K14 [32] | patient interview |
Medical care | Patient Assessment of Chronic Illness Care (PACIC) [33] | patient interview at baseline |
age and gender of GP/size and location of surgery | GP interview | |
Utilization of medical services (incl. medication) | 15 items (short form), respectively 91 items (long form) | patient interview |
Sociodemographic Data | ||
Age and gender | age and gender | chart review |
Migrant status | standardised indicators for mapping migrant status [34] | patient interview at baseline |
Marital status | marital status | patient interview |
Living conditions | independent or assisted living | patient interview |
Household size | household size/household members under 15 years | patient interview |
Education | CASMIN classification [35] | patient interview at baseline |
Former occupation | German epidemiological standard questionnaire [36] | patient interview at baseline |
Income | household size adjusted net income | patient interview |
Wealth | home ownership | patient interview |