Background
Methods
Statistical analysis
Results
Elective admissions (n = 5133) | Emergency admissions(n = 3063) | |||||
---|---|---|---|---|---|---|
n (%) | M | IQR | n (%) | M | IQR | |
Age at diagnosis
| ||||||
< 60 | 1311 (25.5) | 12 | 10-16 | 608 (19.6) | 16 | 12-23 |
60-69 | 1512 (29.5) | 14 | 10-18 | 712 (23.3) | 20 | 14-30 |
70-79 | 1637 (31.9) | 15 | 11-21 | 1009 (32.9) | 24 | 16-36 |
80+ | 673 (13.1) | 18 | 13-28 | 734 (24.0) | 27 | 18-39 |
Gender | ||||||
Male | 3059 (59.6) | 14 | 11-21 | 1644 (53.7) | 21 | 15-32.5 |
Female | 2074 (40.4) | 14 | 11-19 | 1419 (46.3) | 22 | 15-34 |
Marital status
| ||||||
Married | 3188 (62.4) | 13 | 10-18 | 1582 (51.8) | 20 | 14-29 |
Other | 1925 (37.6) | 15 | 11-22 | 1474 (48.2) | 24 | 16-37 |
Deprivation index
1
| ||||||
1 (least deprived) | 903 (17.6) | 14 | 11-20 | 602 (19.7) | 20 | 14-30 |
2 | 655 (12.8) | 14 | 10-20 | 395 (12.9) | 20 | 14-31 |
3 | 685 (13.3) | 14 | 11-20 | 329 (10.7) | 22 | 15-34 |
4 | 877 (17.1) | 14 | 11-20 | 521 (17.0) | 22 | 15-34 |
5 (most deprived) | 1574 (30.7) | 14 | 11-20 | 987 (32.2) | 22 | 15-34 |
missing | 439 (8.6) | 14 | 11-20 | 229 (7.5) | 21 | 15-32 |
Smoking status
| ||||||
Ever | 1909 (37.7) | 14 | 11-21 | 1017 (33.8) | 22 | 15-34 |
Never | 2316 (45.7) | 14 | 10-19 | 1273 (42.3) | 21 | 15-33 |
Unknown | 836 (16.5) | 15 | 11-22 | 719 (23.9) | 21 | 14-32 |
Comorbidity
2
| ||||||
0 | 4137 (80.6) | 14 | 10-19 | 2267 (74.1) | 20 | 14-30 |
1 | 700 (13.6) | 16 | 12-25 | 526 (17.2) | 25 | 17-39 |
2+ | 296 (5.8) | 16 | 11-26.5 | 270 (8.8) | 31 | 20-45 |
Site
3
| ||||||
Proximal | 1469 (28.6) | 13 | 10-19 | 1460 (47.4) | 21 | 15-32 |
Distal | 1269 (24.7) | 14 | 10-18 | 905 (29.6) | 22 | 15-33 |
Rectum | 2236 (43.6) | 15 | 11-21 | 572 (18.7) | 21 | 14-34 |
Non specific | 159 (3.1) | 14 | 10-22 | 126 (4.1) | 21.5 | 16-36 |
Stage
| ||||||
I | 575 (11.2) | 14 | 11-20 | 198 (6.5) | 22 | 14-33 |
II | 1148 (22.4) | 14 | 11-19 | 703 (23.0) | 22 | 15-34 |
III | 1359 (26.5) | 14 | 11-20 | 722 (23.6) | 21 | 14-33 |
IV | 639 (12.5) | 15 | 11-21 | 569 (18.6) | 21 | 15-31 |
Unknown | 1390 (27.1) | 14 | 10-20 | 856 (28.0) | 22 | 14-33 |
Discharge status
| ||||||
Public | 2703 (59.6) | 15 | 11-21 | 1835 (69.2) | 23 | 16-34 |
Private | 1836 (40.5) | 13 | 10-18 | 817 (30.8) | 19 | 13-29 |
Discharged to
| ||||||
Home | 4374 (85.2) | 14 | 10-19 | 2176 (71.0) | 20 | 14-29 |
Care | 519 (10.1) | 18 | 13-26 | 472 (14.4) | 29 | 20-42 |
Death | 133 (2.6) | 19 | 11-38 | 245 (8.0) | 26 | 13-39 |
Other | 107 (2.1) | 21 | 13-32 | 170 (5.6) | 25 | 11-44 |
Same health board
4
| ||||||
Yes | 4591 (89.4) | 14 | 11-21 | 2831(92.4) | 22 | 15-33 |
No | 542 (10.6) | 14 | 11-20 | 232 (7.6) | 18.5 | 13-29.5 |
Hospital volume
5
| ||||||
< 20 | 341 (6.6) | 14 | 11-21 | 242 (7.9) | 24 | 15-34 |
20-39 | 904 (17.6) | 15 | 11-20 | 418 (13.7) | 21 | 15-32 |
40-59 | 1592 (31.0) | 14 | 11-20 | 828 (27.0) | 22 | 16-33 |
60-79 | 911 (17.8) | 13 | 10-18 | 518 (16.9) | 21 | 15-35 |
80-100 | 516 (10.1) | 14 | 10-21 | 344 (11.2) | 21 | 13-34 |
> 100 | 869 (16.9) | 15 | 11-21 | 713 (23.3) | 21 | 14-32 |
Surgeon volume
6
| ||||||
Low (< 15) | 1465 (28.5) | 15 | 11-21 | 1302 (42.5) | 22 | 15-34 |
Medium (15-29) | 1779 (34.7) | 14 | 11-20 | 840 (27.4) | 22 | 15-32 |
High (> 30) | 1889 (36.8) | 14 | 10-20 | 921 (30.1) | 21 | 14-33 |
Elective Patients LOS > 24 days (n = 5133) | Emergency Patients LOS > 24 days (n = 3063) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Crude | Adjusted | Crude | Adjusted | |||||||
OR1
| 95% CI | OR2
| 95% CI | LRT | OR1
| 95% CI | OR2
| 95% CI3
| LRT4
| |
Age at diagnosis
| ||||||||||
< 60 | 1.0 | 1.0 | - | 1.0 | - | 1.0 | ||||
60-69 | 1.60 | 1.26-2.04 | 1.55 | 1.19-2.01 |
p = 0.001
| 1.89 | 1.48-2.43 | 1.56 | 1.18-2.05 |
p < 0.001
|
70-79 | 2.31 | 1.84-2.91 | 1.87 | 1.45-2.43 |
p = 0.001
| 3.47 | 2.76-4.37 | 2.46 | 1.90-3.18 |
p < 0.001
|
80+ | 4.95 | 3.85-6.36 | 3.47 | 2.57-4.66 |
p = 0.001
| 4.63 | 3.63-5.90 | 2.83 | 2.13-3.76 |
p < 0.001
|
Gender
| ||||||||||
Male | 1.0 | - | - | - | - | 1.0 | - | - | - | |
Female | 0.85 | 0.73-0.99 | - | - | - | 1.03 | 0.89-1.19 | - | - | |
Marital status
| ||||||||||
Married | 1.0 | - | 1.0 | 1.0 | - | 1.0 |
p = 0.001
| |||
Other | 1.65 | 1.42-1.92 | 1.20 | 1.00-1.43 |
p = 0.047
| 1.86 | 1.61-2.15 | 1.34 | 1.13-1.59 |
p = 0.001
|
Deprivation index
5
| ||||||||||
1 (least deprived) | 1.0 | - | - | - | 1.0 | - | - | - | ||
2 | 1.06 | 0.81-1.40 | - | - | 1.13 | 0.87-1.47 | - | - | ||
3 | 0.98 | 0.74-1.28 | - | - | 1.25 | 0.95-1.64 | - | - | ||
4 | 0.92 | 0.71-1.19 | - | - | 1.35 | 1.06-1.72 | - | - | ||
5 (most deprived) | 1.08 | 0.88-1.34 | - | - | 1.42 | 1.16-1.75 | - | - | ||
missing | 1.07 | 0.79-1.45 | - | - | - | - | ||||
Smoking status
| ||||||||||
Ever | 1.0 | - | 1.0 | 1.0 | - | - | - | |||
Never | 0.83 | 0.70-0.98 | 0.86 | 0.71-1.04 |
p = 0.005
| 0.91 | 0.73-1.01 | - | - | |
Unknown | 1.32 | 1.07-1.62 | 1.28 | 1.01-1.63 |
p = 0.005
| 0.94 | 0.74-1.09 | - | - | |
Comorbidity
6
| ||||||||||
0 | 1.0 | - | 1.0 | - | 1.0 | - | 1.0 | - | ||
1 | 2.15 | 1.78-2.60 | 1.70 | 1.36-2.12 |
p = 0.001
| 1.99 | 1.65-2.41 | 1.84 | 1.47-2.31 |
p < 0.001
|
2+ | 2.44 | 1.86-3.19 | 1.66 | 1.21-2.27 |
p = 0.001
| 2.84 | 2.19-3.68 | 2.46 | 1.83-3.31 |
p < 0.001
|
Site
7
| ||||||||||
Proximal | 1.0 | - | 1.0 | 1.0 | - | - | - | |||
Distal | 0.98 | 0.79-1.22 | 1.06 | 0.82-1.36 |
p = 0.001
| 1.01 | 0.86-1.20 | - | - | |
Rectum | 1.48 | 1.23-1.77 | 1.83 | 1.48-2.25 |
p = 0.001
| 0.99 | 0.81-1.20 | - | - | |
Non specific | 1.33 | 0.86-2.06 | 1.62 | 0.98-2.66 |
p = 0.001
| 1.09 | 0.76-1.58 | - | - | |
Stage
| ||||||||||
I | 1.06 | 0.82-1.38 | - | - | 1.01 | 0.73-1.39 | - | - | ||
II | 0.87 | 0.69-1.07 | - | - | 1.16 | 0.94-1.43 | - | - | ||
III | 1.0 | - | - | - | 1.0 | - | - | - | ||
IV | 1.06 | 0.83-1.37 | - | - | 0.87 | 0.69-1.09 | - | - | ||
Unknown | 1.10 | 0.90-1.35 | - | - | 1.49 | 0.95-1.43 | - | - | ||
Discharge status
| ||||||||||
Public | 1.0 | - | 1.0 | 1.0 | - | 1.0 | ||||
Private | 0.52 | 0.44-0.62 | 0.59 | 0.49-0.71 |
p = 0.001
| 0.56 | 0.47-0.67 | 0.67 | 0.56-0.81 |
p < 0.001
|
Discharged to
| ||||||||||
Home | 1.0 | - | 1.0 | 1.0 | - | 1.0 | - | |||
Care | 2.60 | 2.10-3.21 | 1.76 | 1.38-2.26 |
p = 0.001
| 2.93 | 2.39-3.60 | 1.96 | 1.55-2.48 |
p < 0.001
|
Death | 4.89 | 3.43-6.96 | 3.00 | 1.97-4.56 |
p = 0.001
| 2.01 | 1.35-2.63 | 1.08 | 0.78-1.48 |
p < 0.001
|
Other | 4.43 | 3.19-7.01 | 3.40 | 2.19-5.28 |
p = 0.001
| 1.93 | 1.41-2.64 | 1.73 | 1.22-2.47 |
p < 0.001
|
Same health board
8
| ||||||||||
Yes | 1.0 | - | - | 1.0 | - | |||||
No | 1.09 | 0.86-1.39 | - | - | 0.61 | 0.46-0.82 | 0.66 | 0.48-0.93 |
p = 0.016
| |
Hospital volume
9
| ||||||||||
< 20 | 1.12 | 0.82-1.53 | - | - | 1.08 | 0.81-1.43 | 1.17 | 0.82-1.67 |
p = 0.002
| |
20-39 | 0.99 | 0.79-1.23 | - | - | 0.88 | 0.69-1.12 | 0.95 | 0.68-1.31 |
p = 0.002
| |
40-59 | 1.0 | - | - | - | 1.0 | - | 1.0 | - | ||
60-79 | 0.74 | 0.59-0.94 | - | - | 0.93 | 0.74-1.16 | 0.63 | 0.46-0.85 |
p = 0.002
| |
80-100 | 1.25 | 0.96-1.61 | - | - | 0.77 | 0.60-1.00 | 0.56 | 0.39-0.80 |
p = 0.002
| |
> 100 | 1.20 | 0.97-1.49 | - | - | 0.80 | 0.65-0.98 | 0.74 | 0.53-1.02 |
p = 0.002
| |
Surgeon volume
10
| ||||||||||
Low (< 15) | 1.0 | - | - | - | 1.0 | - | - | - | ||
Medium (15-29) | 0.76 | 0.63-0.92 | - | - | 0.91 | 0.76-1.09 | - | - | ||
High (> 30) | 0.83 | 0.69-0.99 | - | - | 0.89 | 0.75-1.05 | - | - |
Emergency readmissions | Crude | Adjusted | |||||
---|---|---|---|---|---|---|---|
No n = 7146(%) | Yes n = 657(%) | OR1
| 95% CI3
| OR2
| 95% CI3
| LRT4
| |
Age at diagnosis
| |||||||
< 60 years | 1732 (91.3) | 164 (8.6) | 1.0 | - | 1.0 | ||
60-69 years | 2031 (93.2) | 149 (6.8) | 0.77 | 0.61-0.98 | 0.70 | 0.54-0.90 |
p = 0.038
|
70-79 years | 2267 (91.1) | 222 (8.9) | 1.03 | 0.84-1.28 | 0.76 | 0.60-0.97 |
p = 0.038
|
80+ | 1116 (90.1) | 122 (9.9) | 1.15 | 0.90-1.48 | 0.78 | 0.58-1.05 |
p = 0.038
|
Gender
| |||||||
Male | 4093 (91.4) | 385 (8.6) | 1.0 | - | - | - | |
Female | 3053 (91.82) | 272 (8.18) | 0.95 | 0.80-1.11 | - | - | |
Marital status
| |||||||
Married | 4235 (91.81) | 378 (8.19) | 1.00 | - | - | - | |
Other | 2888 (91.25) | 277 (8.75) | 1.07 | 0.91-1.26 | - | - | |
Deprivation index
5
| |||||||
1 (least deprived) | 1355 (93.5) | 94 (6.5) | 1.00 | - | 1.0 | - | |
2 | 923 (91.7) | 83 (8.3) | 1.30 | 0.95-1.76 | 1.26 | 0.90-1.78 |
p = 0.060
|
3 | 895 (92.1) | 77 (7.9) | 1.24 | 0.91-1.69 | 1.25 | 0.88-1.77 |
p = 0.060
|
4 | 1213 (91.6) | 111 (8.4) | 1.32 | 0.99-1.75 | 1.20 | 0.87-1.66 |
p = 0.060
|
5 (most deprived) | 2193 (90.7) | 225 (9.3) | 1.48 | 1.15-1.90 | 1.42 | 1.07-1.90 |
p = 0.060
|
missing | 567 (89.4) | 67 (10.6) | 1.70 | 1.22-2.36 | 1.68 | 1.16-2.42 |
p = 0.060
|
Smoking status
| |||||||
Ever | 2552 (91.4) | 239 (8.6) | 1.0 | - | - | ||
Never | 3170 (91.8) | 283 (8.2) | 0.95 | 0.80-1.14 | - | - | |
Unknown | 1318 (91.1) | 129 (8.9) | 1.04 | 0.83-1.31 | - | - | |
Comorbidity
6
| |||||||
0 | 5726 (92.2) | 482 (7.8) | 1.0 | - | 1.0 |
p < 0.001
| |
1 | 1013 (90.6) | 105 (9.4) | 1.23 | 0.99-1.54 | 1.10 | 0.86-1.44 |
p < 0.001
|
2+ | 407 (85.3) | 70 (14.7) | 2.04 | 1.56-2.68 | 1.83 | 1.36-2.46 |
p < 0.001
|
Site
7
| |||||||
Proximal | 2516 (91.6) | 231 (8.4) | 1.00 | - | - | - | |
Distal | 1910 (91.9) | 168 (8.1) | 0.96 | 0.78-1.18 | - | - | |
Rectum | 2480 (91.4) | 233 (8.6) | 1.02 | 0.85-1.24 | - | - | |
Non specific | 240 (90.6) | 25 (9.4) | 1.13 | 0.73-1.75 | - | - | |
Stage
| |||||||
I & II | 2338 (92.5) | 190 (7.5) | 1.0 | - | 1.0 | - | |
III & IV | 2856 (90.6) | 295 (9.4) | 1.27 | 1.05-1.54 | 1.22 | 1.00-1.51 |
p = 0.086
|
Unknown | 1951 (91.9) | 172 (8.1) | 1.08 | 0.87-1.34 | 1.00 | 0.78-1.27 |
p = 0.086
|
Index admission
| |||||||
Elective | 4623 (92.7) | 367 (7.4) | 1.0 | 1.0 | - | ||
Emergency | 2522 (89.7) | 290 (10.3) | 1.45 | 1.23-1.70 | 1.21 | 1.00-1.46 |
p = 0.052
|
Discharge status
| |||||||
Public | 3888 (90.6) | 404 (9.4) | 1.0 | 1.0 | - | ||
Private | 2406 (93.8) | 160 (6.2) | 0.64 | 0.53-0.77 | 0.75 | 0.61-0.92 |
p = 0.008
|
Discharged to
| |||||||
Home | 6032 (92.2) | 508 (7.8) | 1.0 | - | 1.0 | ||
Care | 888 (89.7) | 102 (10.3) | 1.36 | 1.09-1.71 | 1.16 | 0.90-1.51 |
p < 0.001
|
Other | 224 (84.2) | 42 (15.8) | 2.23 | 1.58-3.13 | 2.13 | 1.48-3.08 |
p < 0.001
|
Same health board
8
| |||||||
Yes | 6451 (91.5) | 603 (8.6) | 1.0 | - | - | - | |
No | 695 (92.8) | 54 (7.2) | 0.83 | 0.62-1.11 | - | - | |
Hospital volume
9
| |||||||
< 20 | 482 (88.1) | 65 (11.9) | 1.59 | 1.18-2.14 | - | - | |
20-39 | 1134 (90.0) | 126 (10.0) | 1.31 | 1.03-1.66 | - | - | |
40-59 | 2120 (92.2) | 180 (7.8) | 1.0 | - | - | - | |
60-79 | 1232 (91.8) | 110 (8.2) | 1.05 | 0.82-1.35 | - | - | |
80-100 | 753 (91.4) | 71 (8.6) | 1.11 | 0.83-1.48 | - | - | |
> 100 | 1425 (93.1) | 105 (6.9) | 0.86 | 0.67-1.22 | - | ||
Surgeon volume
10
| |||||||
Low (< 10) | 2360 (90.8) | 238 (9.2) | 1.0 | - | - | - | |
Medium (10-29) | 2292 (91.9) | 201 (8.1) | 0.87 | 0.71-1.06 | - | - | |
High (> 30) | 2494 (92.0) | 218 (8.0) | 0.87 | 0.71-1.05 | - | - | |
Surgery LOS quartile
| |||||||
Q1 | 2269 (93.5) | 157 (6.5) | 1.0 | - | 1.0 | - | |
Q2 | 1553 (92.8) | 121 (7.2) | 1.12 | 0.88-1.44 | 1.16 | 0.89-1.51 |
p < 0.001
|
Q3 | 1651 (92.0) | 143 (8.0) | 1.25 | 0.99-1.58 | 1.17 | 0.90-1.53 |
p < 0.001
|
Q4 | 1673 (87.6) | 236 (12.4) | 2.04 | 1.65-2.52 | 1.67 | 1.29-2.16 |
p < 0.001
|