Table 2

ORs of inhospital death according to volume quintile

Hospital volume quintile
Very lowLowMediumHighVery high
Common emergency conditions
 Acute myocardial infarctionCrude OR1.000.820.740.720.71
Adjusted OR (95% CI)1.000.84*(0.81 to 0.87)0.75*(0.72 to 0.78)0.73*(0.7 to 0.76)0.69*(0.66 to 0.72)
 Heart failureCrude OR1.000.950.890.870.81
Adjusted OR (95% CI)1.000.99(0.96 to 1.01)0.96*(0.93 to 0.99)0.95*(0.92 to 0.98)0.91*(0.88 to 0.94)
 Ischaemic strokeCrude OR1.000.770.700.700.72
Adjusted OR (95% CI)1.000.90*(0.87 to 0.94)0.87*(0.83 to 0.9)0.94*(0.91 to 0.98)0.94*(0.91 to 0.98)
 PneumoniaCrude OR1.001.091.161.121.08
Adjusted OR (95% CI)1.001.10(1.07 to 1.13)1.17(1.14 to 1.21)1.13(1.09 to 1.16)1.08(1.04 to 1.11)
 Chronic obstructive pulmonary diseaseCrude OR1.001.061.040.910.66
Adjusted OR (95% CI)1.001.09(1.06 to 1.14)1.08(1.04 to 1.12)0.94*(0.90 to 0.98)0.70*(0.65 to 0.75)
 Hip fractureCrude OR1.001.061.061.071.00
Adjusted OR (95% CI)1.001.07(1.03 to 1.12)1.07(1.03 to 1.11)1.10(1.06 to 1.15)1.01(0.97 to 1.06)
Elective heart and thoracic surgery
 Isolated surgical aortic valve replacementCrude OR1.000.900.800.740.74
Adjusted OR (95% CI)1.000.87(0.69 to 1.10)0.78*(0.62 to 0.99)0.69*(0.54 to 0.87)0.77*(0.61 to 0.97)
 Transcatheter aortic valve replacementCrude OR1.000.970.900.780.64
Adjusted OR (95% CI)1.000.98(0.69 to 1.1)0.87*(0.62 to 0.99)0.79*(0.54 to 0.87)0.65*(0.61 to 0.97)
 Isolated coronary artery bypass graftCrude OR1.000.931.030.730.70
Adjusted OR (95% CI)1.000.98(0.81 to 1.17)1.08(0.90 to 1.28)0.82*(0.68 to 0.99)0.92(0.76 to 1.11)
 Partial lung resection for carcinomaCrude OR1.000.710.680.520.37
Adjusted OR (95% CI)1.000.77*(0.67 to 0.90)0.73*(0.63 to 0.85)0.58*(0.50 to 0.69)0.49*(0.41 to 0.58)
Elective major visceral surgery
 Complex oesophageal surgery for carcinomaCrude OR1.000.830.810.620.51
Adjusted OR (95% CI)1.000.81*(0.68 to 0.96)0.85(0.72 to 1.01)0.67*(0.56 to 0.82)0.47*(0.38 to 0.58)
 Pancreatic resection for carcinomaCrude OR1.000.760.660.520.46
Adjusted OR (95% CI)1.000.80*(0.71 to 0.92)0.68*(0.59 to 0.77)0.54*(0.46 to 0.62)0.46*(0.39 to 0.54)
 Colorectal resection for carcinomaCrude OR1.000.920.770.720.63
Adjusted OR (95% CI)1.000.97(0.91 to 1.02)0.85*(0.80 to 0.90)0.83*(0.78 to 0.88)0.75*(0.70 to 0.80)
 Colorectal resection for diverticulosisCrude OR1.000.860.770.650.60
Adjusted OR (95% CI)1.000.87*(0.80 to 0.95)0.87*(0.79 to 0.95)0.80*(0.72 to 0.88)0.74*(0.67 to 0.82)
 Total nephrectomy for carcinomaCrude OR1.000.920.870.750.80
Adjusted OR (95% CI)1.000.95(0.79 to 1.13)0.89(0.75 to 1.06)0.78*(0.64 to 0.94)0.80*(0.67 to 0.97)
 Cystectomy for carcinomaCrude OR1.000.850.890.800.70
Adjusted OR (95% CI)1.000.85*(0.73 to 0.98)0.86(0.74 to 1.00)0.80*(0.69 to 0.93)0.69*(0.58 to 0.82)
Elective vascular surgery
 Surgical lower extremity revascularisation for atherosclerosisCrude OR1.000.860.800.730.75
Adjusted OR (95% CI)1.000.88*(0.81 to 0.96)0.85*(0.78 to 0.94)0.82*(0.75 to 0.90)0.82*(0.75 to 0.91)
 Open repair of abdominal aortic aneurysmCrude OR1.000.670.730.620.52
Adjusted OR (95% CI)1.000.71*(0.59 to 0.84)0.76*(0.63 to 0.91)0.60*(0.50 to 0.72)0.55*(0.45 to 0.68)
 Endovascular repair of abdominal aortic aneurysmCrude OR1.000.771.170.800.82
Adjusted OR (95% CI)1.000.81(0.63 to 1.04)1.26(1.00 to 1.59)0.93(0.72 to 1.19)0.91(0.68 to 1.21)
 Carotid endarterectomyCrude OR1.000.850.810.820.66
Adjusted OR (95% CI)1.000.92(0.77 to 1.09)0.89(0.75 to 1.05)0.90(0.76 to 1.06)0.77*(0.64 to 0.93)
Elective low-risk surgery
 Cholecystectomy for cholelithiasisCrude OR1.000.971.000.980.84
Adjusted OR (95% CI)1.000.98(0.87 to 1.09)1.06(0.95 to 1.19)1.07(0.95 to 1.19)0.95(0.85 to 1.08)
 Inguinal or femoral hernia repairCrude OR1.000.880.750.660.43
Adjusted OR (95% CI)1.000.94(0.77 to 1.14)0.90(0.72 to 1.11)0.83(0.66 to 1.04)0.66*(0.51 to 0.86)
 Transurethral resection of prostateCrude OR1.001.111.181.130.92
Adjusted OR (95% CI)1.001.06(0.89 to 1.25)1.11(0.93 to 1.32)1.08(0.90 to 1.28)0.98(0.82 to 1.18)
 Primary hip replacement for arthrosis or arthritisCrude OR1.000.780.560.480.27
Adjusted OR (95% CI)1.000.87*(0.75 to 1.00)0.70*(0.60 to 0.82)0.67*(0.56 to 0.79)0.41*(0.33 to 0.51)
 Primary knee replacement for arthrosis or arthritisCrude OR1.000.790.680.590.35
Adjusted OR (95% CI)1.000.84(0.69 to 1.02)0.76*(0.62 to 0.94)0.68*(0.54 to 0.85)0.45*(0.34 to 0.58)
  • Covariates used for risk adjustment are displayed in the online supplementary table 3.

  • *Statistically significantly lower than reference category (very low volume).