Musculoskeletal chronic pain in general practice: Studies of health care utilisation in comparison with pain prevalence

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Abstract
To study the relations between population prevalence of chronic pain and pain-related diagnoses (musculoskeletal and headaches) in primary health care (PHC) and to examine longitudinal variations in these diagnoses. A population-based mailed survey to catch prevalence data and continuous computerised diagnosis registration in PHC. General population in a well-defined Swedish PHC district. A random sample of 15% of the population aged 25-74, n = 1101. Annual visitors to district physicians at the health centre. Rates of pain-related diagnoses in PHC in relation to population prevalence of chronic pain. Comparisons of the number of individuals (annual visiting rates) with pain-related diagnoses 1987-1996. Population pain prevalence and pain-related diagnoses in PHC corresponded as regards the magnitude and distribution of chronic pain by age and partly by pain location. Compared to low-back and widespread pain, neck-shoulder pain and headaches were less frequent in PHC in relation to reported prevalence. From 1987 to 1996 we found an increasing number of individuals seeking primary care with pain-related diagnoses. The increase was mainly assigned to the groups of fibrositis/myalgia and headache. Pain-related diagnoses in PHC reflect partly the occurrence of self-reported chronic pain symptoms in the population. The observed increase in visits with pain-related diagnoses in the last 10 years is due to an increased number of individuals with soft-tissue rheumatism and headaches. Future studies will have to elucidate whether these findings are due to an increase in morbidity or changes in care-seeking and social conditions.