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Table 2 By specialty comparison of two methods for categorization and percentage of physicians identified as high cost or low cost

From: Incorporating statistical uncertainty in the use of physician cost profiles

    T Test (p = 0.05) T Test (p = 0.20)
Specialty Number of physicians (≥ 30 episodes) Physicians assigned a different cost category when comparing t-test (p = 0.05) and percentile cut-off (%) Fraction of physicians identified as high cost using t-test N (%) Fraction of physicians identified as low cost using t-test N (%) Fraction of physicians identified as high cost using t-test N (%) Fraction of physicians identified as low cost using t-test N (%)
All Specialties 8689 29.5% 1072 12.3% 1120 12.9% 1652 19.0% 2004 23.1%
   Allergy and Immunology 77 27.3% 20 26.0% 19 24.7% 22 28.6% 30 39.0%
   Cardiology 474 34.0% 51 10.8% 34 7.2% 65 13.7% 99 20.9%
   Cardiothoracic Surgery 27 44.4% 2 7.4% 0 0.0% 3 11.1% 1 3.7%
   Dermatology 311 21.2% 102 32.8% 104 33.4% 117 37.6% 119 38.3%
   Emergency Medicine 521 34.9% 43 8.3% 37 7.1% 85 16.3% 70 13.4%
   Endocrinology 97 33.0% 10 10.3% 10 10.3% 21 21.6% 15 15.5%
   Family/General Practice 848 28.4% 102 12.0% 103 12.1% 173 20.4% 199 23.5%
   Gastroenterology 356 17.4% 77 21.6% 59 16.6% 101 28.4% 88 24.7%
   General Surgery 407 39.6% 23 5.7% 22 5.4% 39 9.6% 53 13.0%
   Hematology/Oncology 122 36.1% 11 9.0% 7 5.7% 24 19.7% 26 21.3%
   Infectious Diseases 89 32.6% 8 9.0% 13 14.6% 12 13.5% 18 20.2%
   Internal Medicine 2158 24.6% 292 13.5% 382 17.7% 440 20.4% 625 29.0%
   Nephrology 111 40.5% 6 5.4% 7 6.3% 14 12.6% 16 14.4%
   Neurological Surgery 62 33.9% 7 11.3% 4 6.5% 11 17.7% 10 16.1%
   Neurology 249 24.1% 35 14.1% 31 12.4% 56 22.5% 50 20.1%
   Obstetrics and Gynecology 756 36.4% 54 7.1% 55 7.3% 91 12.0% 130 17.2%
   Ophthalmology 421 18.3% 86 20.4% 89 21.1% 113 26.8% 128 30.4%
   Oral & Maxillofacial Surgery 113 32.7% 14 12.4% 7 6.2% 24 21.2% 18 15.9%
   Orthopedic Surgery 451 39.7% 20 4.4% 29 6.4% 58 12.9% 76 16.9%
   Otolaryngology 191 19.4% 30 15.7% 37 19.4% 46 24.1% 66 34.6%
   Physical Medicine & Rehabilitation 70 27.1% 8 11.4% 9 12.9% 12 17.1% 16 22.9%
   Plastic Surgery 101 34.7% 10 9.9% 7 6.9% 20 19.8% 19 18.8%
   Psychiatry 97 30.9% 7 7.2% 13 13.4% 9 9.3% 25 25.8%
   Pulmonary & Critical Care 203 40.9% 15 7.4% 8 3.9% 27 13.3% 25 12.3%
   Rheumatology 127 29.1% 17 13.4% 16 12.6% 24 18.9% 37 29.1%
   Urology 191 31.9% 20 10.5% 17 8.9% 37 19.4% 43 22.5%
   Vascular Surgery 59 45.8% 2 3.4% 1 1.7% 8 13.6% 2 3.4%