Table 2.

Summary statistics illustrating potential misweighting of risk factors

	A. Fraction tested	B. Test yield
Selected candidates for under-weighting
Prostate cancer (CCW)	0.0370	0.1019
No prostate cancer (CCW)	0.0380	0.0677
Black	0.0313	0.0851
Non-black	0.0385	0.0682
History of PE	0.0726	0.1881
No history of PE	0.0378	0.0686
History of deep vein thrombosis	0.0507	0.1656
No history of deep vein thrombosis	0.0378	0.0685
Prior hospital visit within 30 days	0.0465	0.1976
No prior hospital visit within 30 days	0.0377	0.0656
Selected candidates for over-weighting
Chronic obstructive pulmonary disease (CCW)	0.0466	0.0524
No chronic obstructive pulmonary disease (CCW)	0.0360	0.0742
Ischemic heart disease (CCW)	0.0376	0.0566
No ischemic heart disease (CCW)	0.0382	0.0786
Atrial fibrillation (CCW)	0.0317	0.0520
No atrial fibrillation (CCW)	0.0388	0.0713

Notes: Table reports summary statistics for selected comorbidities to motivate the examination of misweighting. Variables are selected on the Column A reports average rates of testing for patients with and without the listed conditions. Column B reports average rate of positive tests among tested patients with and without the listed conditions. CCW notes comorbidity is coded by the Chronic Condition Warehouse. Data is from the Medicare claims 2000–2009.