References
- Freeborn DK, Pope CR, Mullooly JP, McFarland BH. Consistently high users of medical care among the elderly. Med Care 1990;28:527–40.
- Hulka B, Wheat J. Patterns of utilization: the patient perspective. Med Care 1985;23:438–60.
- Agréus L, Svärdsudd K, Nyren 0, Tibblin G. The epidemi-ology of abdominal symptoms: prevalence and demo-graphic characteristics in a Swedish adult population. A report from The Abdominal Symptom Study (thesis). Upp-sala: Uppsala University, 1993.
- Tibblin G, Cato K, Svärdsudd K. Göteborg quality of life study of men born in 1913 and 1923 - age, sex, job satis-faction and cardiovascular diseases. Scand J Prim Health Care 1990;1 Suppl 8:39–45.
- Population Educational Register, Version 191998-01-01. Statistics Sweden - SCB, 1998.
- Tibblin G, Tibblin B, Peciva S, Kullman S, Svärdsudd K. "The Göteborg quality of life instrument" - an assessment of well-being and symptoms among men born 1913 and 1923. Methods and validity. Scand J Prim Health Care 1990;1 Suppl 8:33–8.
- JMP. Introductory Guide, Version 3.1 of JMP. SAS Insti-tute Inc. SAS Campus Drive, Cary, NC 27513, 1995.
- Wiklund I. The Nottingham Health Profile - a measure of health-related quality of life. Scand J Prim Health Care 1990;1 Suppl 8:15–8.
- Bergner M, Bobbbit R, Carter W, Gilson B. The Sickness Impact Profile: development and final revision of health status measure. Med Care 1981;19:787–805.
- Chambers L, MacDonald L, Tungwell P, Buchanan W, Kraag G. The MacMaster Health index questionnaire as measure of the quality of life for patients with rheumatic disease. J Rheumatol 1982;90:780.
- Dimends E. The SSA-profile, an instrument for assessment of subjective symptoms among hypertensives. Scand J Prim Health Care 1990;1 Suppl 8:27–30.
- Dahlia C. Minor Symptoms Evaluation (MSE) Profile - a questionnaire for assessment of subjective CNS-related symptoms. Scand J Prim Health Care 1990;1 Suppl 8:19–25.
- Jern S. Questionnaire for the Assessment of Symptoms and Psychological Effects in Cardiovascular Therapy (the AS-PECT Scale). Scand J Prim Health Care 1990;1 Suppl 8:31–2.
- Dahlöf C, Dimends E, Kendall M, Wiklund I. Quality of life in cardiovascular diseases. Emphasis on beta-blocker treatment. Circulation 1991;84:108–18.
- Mohide EA, Torrance GW, Streiner DL, Pringle DM, Gilbert R. Measuring the wellbeing of family caregivers using the time trade-off technique. J Clin Epidemiol 1988;41:475–82.
- Eriksson H, Svärdsudd K, Larsson B, Welin L, Ohlson L-0, Tibblin G. Quality of life in early heart failure. The study of men born in 1913. Scand J Prim Health Care 1988;6: 161–7.
- Bengtsson C, Edstr8m K, Furunes B, Sigurdsson JA, Tib-blin G. Prevalence of subjectively experienced symptoms in a population sample of women with special reference to women with arterial hypertension. Scand J Prim Health Care 1987;5:155–62.
- Tibblin G, Bengtsson C, Furunes B, Lapidus L. Symp-toms by age and sex. The population studies of men in Gothenburg, Sweden. Scand J Prim Health Care 1990;8:9–17.
- Sullivan M, Karlsson J, Bengtsson C, Furunes B, Lapidus L, Lissner L. "The G8teborg Quality of Life Instru-ment" — a psychometric evaluation of assessments of symptoms and well-being among women in a general popu-lation. Scand J Prim Health Care 1993;11:267–75.