Effects on physicians' sick-listing practice of an administrative reform narrowing sick-listing benefits.

Objective: To find out whether administrative changes regulating sick-listing benefits affect sick-listing practice among physicians in hospitals and primary health care.

Setting: New sick-listing cases from four social security offices in mid-Sweden.

Design: A natural experiment design was used with a sample of newly started sick-listed cases collected 6 months before a sick-listing reform and a further sample taken 6 months after. The data were collected in a 1-year follow-up period in both samples.

Main Outcome Measures: Net days of sick-listing and percentage partial sick-listings. Compliance by doctors in providing information asked for in sickness certification forms.

Results: Doctors filled in the forms more completely after the reform than they did before it. There was an inverse correlation between completeness of information and length of sick-listing. When potential confounding factors were taken into account, no change was seen in the proportion of partial sick-listing, in the mean number of net days of sick-listing or in the distribution of length of sick-listing periods. The proportion of all sick-listings made by general practitioners increased.

Conclusions: Administrative changes restricting sick-listing benefits did change some aspects of sick-listing practice but had no effect on length of sick-listing.