Table 2

Variation in potentially non-indicated cardiac testing prevalence for high-risk and low-risk cohorts across 306 hospital referral regions, 2011

 Composite (all tests)ECGsCardiovascular stress testsEchocardiogramsAdvanced cardiac imaging
Coefficient of variation0.310.
  • Testing prevalence indicates per cent of beneficiaries with one or more tests without associated symptomatic indication in the calendar year. Data reflect 1.9 million person-years in the high-risk cohort and 1.6 million person-years in the low-risk cohort.