Table 3.
Abdominoperineal (AP) resection* versus other resections†(reference group) in 7,033 incident rectal cancer patients
| |
Total (N = 7033) |
AP resection (N = 727) |
Random-effect model‡ |
||
|---|---|---|---|---|---|
| No. | % | OR | (95% CI) | P | |
|
Age (years) |
|
|
|
|
|
| ≤60 |
1,342 |
17.4 |
1 |
|
<0.001 |
| 61-70 |
2,083 |
20.7 |
1.10 |
(0.91-1.33) |
|
| 71-80 |
2,536 |
23.9 |
1.30 |
(1.08-1.56) |
|
| >80 |
1,072 |
24.6 |
1.38 |
(1.11-1.71) |
|
|
Gender |
|
|
|
|
|
| Male |
4,275 |
23.0 |
1 |
|
0.002 |
| Female |
2,758 |
19.9 |
0.78 |
(0.69-0.89) |
|
|
Educational level |
|
|
|
|
|
| Secondary or more |
969 |
17.7 |
1 |
|
<0.001 |
| Intermediate |
1,516 |
19.2 |
1.11 |
(0.90-1.38) |
|
| Primary |
3,796 |
23.9 |
1.40 |
(1.16-1.70) |
|
| Unknown |
752 |
22.1 |
1.29 |
(0.97-1.70) |
|
|
Marital status |
|
|
|
|
|
| Married |
4,651 |
21.3 |
1 |
|
0.002 |
| Unmarried§ |
1,854 |
24.2 |
1.17 |
(1.02-1.35) |
|
| Unknown |
528 |
17.6 |
0.83 |
(0.63-1.10) |
|
|
OPE‡ |
|
|
|
|
|
| No |
5,437 |
22.5 |
1 |
|
0.05 |
| Yes |
1,596 |
19.6 |
0.87 |
(0.75-1.01) |
|
|
Disease staging |
|
|
|
|
|
| Absence of metastases |
6,180 |
21.8 |
1 |
|
0.82 |
| Presence of metastases |
853 |
22.3 |
1.11 |
(0.93-1.32) |
|
|
Comorbidity (Charlson index) |
|
|
|
|
|
| 0 |
5,174 |
21.5 |
1 |
|
0.24 |
| ≥1 |
1,859 |
22.8 |
1.01 |
(0.89-1.16) |
|
|
Year of admission |
|
|
|
|
|
| 2000 |
861 |
23.0 |
1 |
|
0.04 |
| 2001 |
887 |
23.9 |
1.12 |
(0.89-1.41) |
|
| 2002 |
789 |
23.7 |
1.06 |
(0.84-1.35) |
|
| 2003 |
825 |
19.1 |
0.87 |
(0.68-1.11) |
|
| 2004 |
961 |
20.0 |
0.92 |
(0.73-1.16) |
|
| 2005 |
906 |
22.2 |
1.02 |
(0.80-1.28) |
|
| 2006 |
923 |
23.4 |
1.08 |
(0.86-1.36) |
|
| 2007 |
881 |
19.4 |
0.85 |
(0.67-1.09) |
|
|
Hospital volume (annual caseload) |
|
|
|
|
|
| >25 |
3,688 |
20.6 |
1 |
|
0.001 |
| 11-25 |
2,560 |
22.1 |
1.03 |
(0.81-1.31) |
|
| ≤10 | 785 | 26.6 | 1.37 | (1.03-1.82) | |
*ICD9: 48.5, 48.62. †ICD9: 45.4x-45.8x, 48.3x-48.4x, 48.61, 48.63-48.69.
‡Cases with obstruction or perforation or in emergency admission were classified in the OPE category.
§Unmarried includes single, separated, divorced and widowed.
OR: odds ratio, CI: confidence interval, APR-DRG: all-patient-refined-diagnosis-related group, OPE: obstruction, perforation or emergency admission.