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. Author manuscript; available in PMC: 2014 Mar 25.
Published in final edited form as: JAMA Intern Med. 2013 Mar 25;173(6):468–470. doi: 10.1001/jamainternmed.2013.2509

Table.

Variation in Adjusted Drug Use and Adherence in Different Hospital-Referral Regions a

Min 25th Median 75th Max Mean S.D. 90th/10th 75th/25th COV
Drug spending 336 445 479 508 681 480 52.84 1.31 1.14 0.11
No. of prescriptions 15.98 18.80 19.47 20.25 23.81 19.58 1.15 1.15 1.08 0.06
Intensity of treatment 0.29 0.41 0.43 0.46 0.62 0.44 0.04 1.26 1.13 0.10
MPR≥0.8 0.36 0.48 0.52 0.56 0.71 0.52 0.05 1.31 1.15 0.10
a

All drug measures are only for three therapeutic drug classes of study interest: beta-blockers, Angiotensin Converting Enzymes/Angiotensin Receptor Antagonists, and diuretics. Intensity of drug treatment is defined as the proportion of patients on these three therapeutic classes.

Abbreviations: MPR = Medication Possession Ratio; 10th = 10th percentiles, etc; S.D. = standard deviation; and COV = coefficient of variation (=S.D./Mean).