Quality of life among diabetic patients in Swedish primary health care and in the general population: comparison between 1992 and 1995.

To assess change over time in health-related quality of life (HRQoL) in diabetic patients in primary health care and differences to general Swedish population samples, 341 diabetic subjects in 1992 and 413 in 1995, aged 20-84 years, were chosen from three community health centres (CHCs) in the Metropolitan Stockholm area and compared to controls matched by age and sex in randomly selected samples of 2,366 subjects in 1991 and 2,500 in 1995 from the general population. HRQoL was assessed by the Swedish Health-Related Quality of Life Survey (SWED-QUAL), adapted from the Medical Outcomes Study, which measures aspects of physical, mental, social and general health in 13 scales. Information on diabetic and general medical data were extracted from the medical records at the CHCs. HRQoL was lower in diabetic subjects compared with the general population in both 1992 and 1995 in all scales except family functioning and marital functioning. The level of HRQoL did not change significantly between the diabetic samples, but decreased in the population samples, making the difference compared to diabetic patients smaller in five of the scales. The most significant predicting factors for the SWED-QUAL results in diabetic patients in 1995 were the vascular and non-vascular co-morbidity.