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. Author manuscript; available in PMC: 2013 Jul 2.
Published in final edited form as: Circ Cardiovasc Qual Outcomes. 2012 Dec 11;6(1):66–74. doi: 10.1161/CIRCOUTCOMES.112.966697

Table 3.

Relationship between the proportion of patients per facility meeting the current LDL < 100 mg/dL threshold performance measure and potential overtreatment1

Proportion of patients per facility
meeting the LDL <100 threshold
performance measure, by quartile		 Independent effect of current
performance on predicted
probability (CI) of potential
overtreatment2
Lowest quartile (8.4%-60.3%) 10.7% (10.2-11.1)
Second (60.3%-66.5%) 12.4% (11.9-12.8)
Third (66.5%-71.0%) 13.7% (13.2-14.2)
Highest quartile (71.0%-84.0%) 14.3% (13.8-14.8)
1

Potential overtreatment defined as: among all diabetic patients, the proportion of patients without IHD who are prescribed high dose statins.

2

Predicted probability of potential overtreatment per quartile of meeting the current threshold measures, based on multilevel logistic regression for facilities at the median rate of overtreatment (p<0.001). These estimates isolate the hypothetical effect of a facilities being in different quartiles of current performance if the propensity to overtreat at a sample of facilities was otherwise the same. Given that current performance and potential overtreatment are correlated, the observed probabilities would differ by much more.