OBJECTIVES
To assess the feasibility of refining physician quality indicators of screening mammography use based on patient life expectancy.
DESIGN
Retrospective population-based cohort study
SETTING
Texas
PARTICIPANTS
3,595 usual care providers (UCPs) with at least 10 women in their patients aged 67+ on 1/1/2008 with an estimated life expectancy of ≥7 years (222,584 women) and at least 10 women with an estimated life expectancy of <7 years (90,903 women), based on age and comorbidity.
MEASUREMENTS
Screening mammography use in 2008–09 by each provider with each population.
RESULTS
The average adjusted mammography screening rates for UCPs were 31.1% and 55.2% for women with a life expectancy of <7 years and ≥7 years, respectively. For women with limited life expectancy, 3.7% of UCPs had significantly lower and 9.2% had significantly higher than average adjusted mammography screening rates. For women with longer life expectancy, 16.7% and 19.7% UCPs had significantly lower and higher than average rates, respectively. UCP adjusted screening rates were stable over time (2006–2007 vs. 2008–2009, r=0.65, p<0.001). There was a strong correlation among UCPs between screening rates of their women patients with a life expectancy of <7 years and for those with a life expectancy of ≥7 years (r=0.67, p<0.001). Most physician characteristics associated with higher screening rates (e.g., being female and foreign trained) in women with longer life expectancy were also associated with higher screening rates in women with limited life expectancy.
CONCLUSION
Providers with high mammography screening rates for women with longer life expectancy also tend to screen women with limited life expectancy. Quality indicators for screening practice can be improved by distinguishing appropriate use from overuse based on patient life expectancy.