The percentage of cautery fires have increased over time from approximately <1% of all surgical claims during 1985–1989 to 4.4% of all surgical claims between the years 2000 and 2009 (P < 0.001 by logistic regression of cautery fire on year). The markers show cautery fires as a percent of nonfire surgical claims during each year, with the years 2006–2009 combined and indicated at the average year of 2007.5. The line represents the fitted logistic regression curve of cautery fire on year.