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Table 3 Differences in rarity and complexity among hospital groups in Japan

From: Functional mapping of hospitals by diagnosis-dominant case-mix analysis

   Healthcare facility groups
   MTH OTH OPH LPH SPH C
In-patient Rarity index* 2.82 (2.75 – 2.88) 2.66 (2.59 – 2.72) 2.57 (2.50 – 2.63) 2.35 (2.28 – 2.42) 2.34 (2.27 – 2.40) 2.36 (2.26 – 2.45)
   -- p = 0.026 vs. MTH p < 0.001 vs. MTH p < 0.001 vs. MTH p < 0.001 vs. MTH p < 0.001 vs. MTH
   -- -- p = 0.049 vs. OTH p < 0.001 vs. OTH p < 0.001 vs. OTH p < 0.001 vs. OTH
   -- -- -- p < 0.001 vs. OPH p < 0.001 vs. OPH p = 0.001 vs. OPH
   -- -- -- -- N.S. vs. LPH N.S. vs. LPH
   -- -- -- -- -- N.S. vs. SPH
  Complexity index* 1.14 (1.09 – 1.20) 1.06 (1.01 – 1.11) 1.00 (0.96 – 1.05) 1.02 (0.97 – 1.07) 0.98 (0.94 – 1.03) 0.88 (0.83 – 0.93)
   -- N.S. vs. MTH p = 0.002 vs. MTH p = 0.013 vs. MTH p < 0.001 vs. MTH p < 0.001 vs. MTH
   -- -- N.S. vs. OTH N.S. vs. OTH p = 0.015 vs. OTH p < 0.001 vs. OTH
   -- -- -- N.S. vs. OPH N.S. vs. OPH p = 0.010 vs. OPH
   -- -- -- -- N.S. vs. LPH p = 0.005 vs. LPH
   -- -- -- -- -- p = 0.023 vs. SPH
  Relative healthcare expenditure† 0.03 0.09 0.15 0.05 0.10 0.02
Out-patient Rarity index* 2.43 (2.27 – 2.60) 2.26 (2.17 – 2.34) 2.12 (2.05 – 2.19) 2.08 (1.95 – 2.21) 2.02 (1.94 – 2.09) 1.87 (1.84 – 1.91)
   -- N.S. vs. MTH p < 0.001 vs. MTH p = 0.001 vs. MTH p < 0.001 vs. MTH p < 0.001 vs. MTH
   -- -- p = 0.021 vs. OTH p = 0.033 vs. OTH p < 0.001 vs. OTH p < 0.001 vs. OTH
   -- -- -- N.S. vs. OPH p = 0.048 vs. OPH p < 0.001 vs. OPH
   -- -- -- -- N.S. vs. LPH p = 0.003 vs. LPH
   -- -- -- --   p < 0.001 vs. SPH
  Complexity index* 0.87 (0.77 – 0.97) 0.82 (0.76 – 0.87) 0.81 (0.77 – 0.86) 0.81 (0.73 – 0.89) 0.83 (0.78 – 0.88) 0.75 (0.73 – 0.77)
   -- N.S. vs. MTH N.S. vs. MTH N.S. vs. MTH N.S. vs. MTH p = 0.020 vs. MTH
   -- -- N.S. vs. OTH N.S. vs. OTH N.S. vs. OPH p = 0.016 vs. OTH
   -- -- -- N.S. vs. OTH N.S. vs. LPH p = 0.011 vs. OPH
   -- -- -- -- N.S. vs. LPH N.S. vs. OPH
   -- -- -- -- -- p = 0.002 vs. SPH
  Relative healthcare expenditure† 0.02 0.05 0.08 0.02 0.06 0.33
  1. MTH: Major teaching hospital, OTH: Other teaching hospital, OPH: Other public hospital, LPH: Large private hospital, SPH: Small private hospital, C: Clinic, N.S.: Not significant
  2. *Mean (confidence interval) and p-values by Student's t test
  3. † Determined from results of the Survey of National Medical Care Insurance Services conducted in 2002 in Japan.