Overview of HEALSEE's Research Design
Sampling Representative samples of persons aged 65 and older; all persons of eligible age will be interviewed; Effective sample size: 2,000; Three-stage probability sampling.
Data collection mode Personal and telephone interviews will be collected by a survey institute. Data collection includes:
  1. Computer-assisted personal interview (CAPI) of 60 minutes with respondents
  2. Computer-assisted telephone follow-up interview (CATI) of 15 minutes with the respondents two weeks after the personal interview
  3. Paper-and-pencil questionnaire sent to ego-centric network persons
  4. Four-week health diaries for a sub-sample of 50 respondents
Instruments applied / developed for data collection The survey will rely mostly on standardized scales supplemented by newly developed scales:
Health: self-assessed health (5-point scale); list of chronic conditions (SHARE); 36-Item Short Form Health Survey (SF-36, v2); health measures (weight and height, blood pressure, handgrip strength)
Somatic symptoms: 15-Item Somatic Symptom Severity Scale (PHQ-15)
Health beliefs: Perceived Health Competence Scale (PHCS); Holistic Complementary and Alternative Medicine Questionnaire (HCAMQ)
Healthcare: list of healthcare providers contacted, including providers of alternative/complementary medicine (to be developed)
Self-care: list of self-care activities, including self-medication, getting rest, physical manipulation, changing diet, limiting activities, praying (to be developed)
Egocentric networks: name generator and interpreter and information about health-relevant alter attributes; who did the respondent talk to?; advice given; has advice been followed? (to be developed)
Healthcare system characteristics: density of healthcare providers (general practitioners and specialists); availability of hospital care, density of hospital beds; public-private mix of healthcare provision; implementation of managed-care models; healthcare system characteristics covered in the surveys: insurance status (statutory, exclusive private insurance, supplemental private insurance); usual source of care; distance to usual source of care; distance to other providers contacted; distance to hospital; knowledge about and availability and use of managed-care units (to be developed).