Impact of comorbidity on the individual's choice of primary health care provider.

Abstract Objective. This study examined whether age, gender, and comorbidity were of importance for an individual's choice of listing with either a public or a private primary health care (PHC) practice. Design and setting. The study was a register-based closed cohort study in one private and one public PHC practice in Blekinge County in southern Sweden. Subjects. A cohort (12 696 individuals) was studied comprising all those listed with the public or private PHC practice on 1 October 2005 who were also listed with the public PHC practice on 1 October 2004. Main outcome measures. The listing/re-listing behaviour of the population in this cohort was studied at two points in time, 1 October 2005 and 1 October 2006, with respect to age, gender, and comorbidity level as measured by the ACG Case-Mix system. Results. Individuals listed with the public practice both on 1 October 2005 and one year later were significantly older, were more often females, and had a higher comorbidity level than individuals listed with the private practice. Individuals with a higher comorbidity level were more likely to re-list or to stay listed with the public practice. Conclusions. This study shows that the probability of choosing a public instead of private PHC provider increased with higher age and comorbidity level of the individuals. It is suggested that using a measure of comorbidity can help us understand more about the chronically ill individual's choice of health care provider. This would be of importance when health care policy-makers decide on reimbursement system or organization of PHC.