Low Volume

Medium Volume

High Volume

n

1129

2427

4564

Sex (%)

Male

506 (44.8%)

1156 (47.6%)

2186 (47.9%)

Age group (%)

<30 yrs

30-39 yrs

40-49 yrs

50-59 yrs

60-69 yrs

70-79 yrs

>79 yrs

70 (6.2%)

90 (7.9%)

143 (12.7%)

152 (13.5%)

234 (20.7%)

246 (21.8%)

194 (17.2%)

153 (6.3%)

208 (8.6%)

289 (11.9%)

344 (14.2%)

437 (18.0%)

599 (24.6%)

397 (16.4%)

356 (7.8%)

436 (9.6%)

507 (11.1%)

733 (16.1%)

934 (20.5%)

927 (20.3%)

671 (14.6%)

Medical Card (%)

Yes

414 (36.7%)

880 (36.3%)

2008 (44.0%)

Cancer Diagnosis (%)

Yes

175 (15.5%)

389 (16.0%)

687 (15.1%)

Admission Source (%)

Home

Other Hospital

Nursing Home

1067 (94.5%)

26 (2.3%)

36 (3.2%)

2299 (94.7%)

74 (3.1%)

54 (2.2%)

4150 (90.9%)

363 (7.9%)

51 (1.2%)

Charlson comorbidity index score (%)

0

1-3

4-6

7-9

10+

764 (67.7%)

41 (3.6%)

43 (3.8%)

56 (4.9%)

225 (20.0%)

1620 (66.7%)

109 (4.5%)

115 (4.7%)

99 (4.1%)

484 (20.0%)

2822 (61.8%)

169 (3.7%)

251 (5.5%)

281 (6.2%)

1041 (22.8%)

ICU admission (%)

Yes

698 (61.8%)

1124 (46.3%)

1396 (30.6%)

Discharge destination (%)

Home

Nursing Home

Transfer

Death

826 (73.2%)

141 (12.5%)

75 (6.6%)

87 (7.7%)

1871 (77.1%)

275 (11.3%)

92 (3.8%)

189 (7.8%)

3397 (74.4%)

527 (11.6%)

294 (6.4%)

346 (7.6%)

Total LOS

Mean [SD]

20.7 [24.2]

19.3 [24.3]

23.2 [30.4]

Pre-operative LOS

Mean [SD]

4.5 [8.4]

3.8 [8.2]

5.1 [10.1]

Post-operative LOS

Mean [SD]

16.2 [21.5]

15.4 [21.7]

18.1 [26.8]

ICU LOS

Mean [SD]

4.5 [8.0]

2.9 [6.7]

2.6 [9.7]