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Table 2 Parameters of the most frequent procedures (P1-P3)

From: Effect of patient’s age on the profitability of inpatient cardiac catheterization: a contribution margin analysis of frequently performed procedures over a 5-year period

Procedure P1
Diagnostic catheter with closure device
Young Old Very old F P-value
n = 600 n = 600 n = 600
48 ± 7 years 63 ± 7 years 76 ± 5 years
DRG revenue (Euro) 2077 ± 917 2122 ± 1024 2398 ± 1028 18 <0.001
DRG revenue per day (Euro) 592 ± 253 600 ± 276 535 ± 278 11 <0.001
Contribution margin (Euro) 1771 ± 922 1804 ± 1029 2065 ± 1033 16 <0.001
Contribution margin per day (Euro/d) 484 ± 206 488 ± 234 440 ± 226 9 <0.001
Relative DRG weight 0.73 ± 0.27 0.77 ± 0.37 0.85 ± 0.34 19 <0.001
LOS (d) 4.5 ± 3.9 4.6 ± 3.8 6.2 ± 4.8 33 <0.001
Fluoroscopy time (min) 2.5 ± 2.5 2.7 ± 2.8 3.5 ± 3.8 19 <0.001
Material expenditure (Euro) 172 ± 39 171 ± 28 178 ± 48 4.6 0.01
Procedure P2
Diagnostic catheter without closure device
Young Old Very old F P-value
n = 149 n = 149 n = 148
50 ± 9 years 62 ± 4 years 76 ± 5 years
DRG revenue (Euro) 2079 ± 798 1994 ± 1029 2383 ± 1193 6.3 0.003
DRG revenue per day (Euro) 579 ± 243 586 ± 268 497 ± 261 6.0 0.004
Contribution margin (Euro) 1801 ± 812 1695 ± 1020 2079 ± 1120 5.7 0.004
Contribution margin per day (Euro/d) 482 ± 200 472 ± 223 419 ± 211 3.9 0.02
Relative weight 0.74 ± 0.26 0.73 ± 0.33 0.81 ± 0.33 5.6 ns
Length of hospital stay (d) 4.5 ± 3.0 4.5 ± 4.1 7.0 ± 6.3 14 <0.001
Fluoroscopy time (min) 3.7 ± 4.0 5.6 ± 6.6 5.2 ± 5.1 4.4 0.01
Material expenditure (Euro) 104 ± 34 109 ± 39 122 ± 56 836 0.002
Procedure P3
Combined diagnostic left and right heart catheter with closure device
Young Old Very old F P-value
n = 136 n = 136 n = 137
52 ± 8 years 67 ± 3 years 77 ± 4 years
DRG revenue (Euro) 2021 ± 697 2225 ± 1197 2681 ± 3008 4.2 0.01
DRG revenue per day (Euro) 604 ± 219 566 ± 208 516 ± 211 5.9 0.003
Contribution margin (Euro) 1646 ± 695 1827 ± 1182 2266 ± 3018 3.8 0.02
Contribution margin per day (Euro/d) 475 ± 180 444 ± 166 415 ± 172 4.3 0.02
Relative weight 0.73 ± 0.25 0.79 ± 0.38 0.94 ± 1.1 3.7 0.02
Length of hospital stay (d) 4.1 ± 3.1 5.1 ± 5.1 6.6 ± 6.2 8.7 <0.001
Fluoroscopy time (min) 3.9 ± 4.0 4.4 ± 5.2 4.6 ± 6.6 - ns
Material expenditure (Euro) 219 ± 30 221 ± 34 238 ± 163 - ns
  1. DRG Diagnosis Related Groups