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Table 2 Case-mix difference by rarity index among healthcare facility groups in Japan

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

   

Disease categories by rarity index

   

Rare diseases

Intermediate diseases

Common diseases

Rarity index

  

2.20–7.53

1.60–2.15

0.87–1.59

DPC disease category name (excerpts)

  

Pheochromocytoma, paraganglioma; Malignant cardiac tumour; Tuberculous meningitis, meningoencephalitis; Acquired deformation of femur; Orbital tumour

Malignant breast tumour; Tachycardic arrhythmia; Malignant gastric tumour; Chronic sinusitis; Rheumatoid arthritis of upper limb (from shoulder to hand)

Hypertensive disease (without organ damage); Type 2 diabetes (excluding diabetic ketoacidosis) and diabetes not elsewhere classified*; Cataract and other disorders of the lens; Metabolic disorders other than diabetes mellitus; Asthma

Ratio of patients with each disease category for each group of facilities‡ (%)

Inpatient†

MTH

79.9 (79.5 – 80.3)

15.2 (14.9 – 15.6)

4.8 (4.6 – 5.1)

  

OTH

74.4 (74.1 – 74.7)

19.7 (19.4 – 20.0)

5.9 (5.7 – 6.1)

  

OPH

68.1 (67.8 – 68.4)

26.4 (26.2 – 26.6)

5.5 (5.4 – 5.6)

  

LPH

55.5 (55.1 – 55.9)

39.8 (39.4 – 40.2)

4.7 (4.6 – 4.9)

  

SPH

54.1 (53.8 – 54.3)

40.6 (40.3 – 40.8)

5.4 (5.2 – 5.5)

  

C

49.2 (48.0 – 50.4)

39.3 (38.1 – 40.4)

11.5 (10.8 – 12.3)

 

Outpatient†

MTH

58.0 (57.6 – 58.4)

29.9 (29.5 – 30.2)

12.2 (11.9 – 12.4)

  

OTH

52.2 (51.9 – 52.5)

31.9 (31.7 – 32.2)

15.8 (15.6 – 16.1)

  

OPH

44.9 (44.6 – 45.1)

34.7 (34.5 – 35.0)

20.4 (20.2 – 20.6)

  

LPH

40.4 (39.9 – 41.0)

38.7 (38.2 – 39.3)

20.8 (20.4 – 21.3)

  

SPH

36.9 (36.5 – 37.3)

39.0 (38.6 – 39.3)

24.1 (23.8 – 24.4)

  

C

28.6 (28.4 – 28.8)

39.6 (39.4 – 39.8)

31.8 (31.6 – 32.0)

  1. DPC: Diagnosis-procedure combination, MTH: Major teaching hospital, OTH: Other teaching hospital, OPH: Other public hospital, LPH: Large private hospital, SPH: Small private hospital, C: Clinic
  2. *DPC100070 for Type 2 Diabetes Mellitus (DM) and DPC100340 for Other DM were analysed as one category in this study.
  3. † Pearson's chi-squared test: p < 0.001 both for inpatients and outpatients
  4. ‡ Mean (Confidence interval)