Table 6.
Impact of weekday of surgery, Monday through Thursday versus Friday, on primary outcomes
| Weekday | Esophageal carcinoma | Gastric carcinoma | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Corrected for | Outcome / N | ORa | 95% CIb | P value | Corrected for | Outcome / N | ORa | 95% CIb | P value | ||
| Severe complicationsc (yes) |
Mon-Thu (ref) Fri |
Alld |
712 / 2341 95 / 322 |
1 0.90 |
0.69 – 1.19 | 0.471 | No relevant confounders identifiede |
173 / 922 40 / 189 |
1 1.16 |
0.78 – 1.70 | 0.445 |
|
30-day/in-hospital mortality (yes) |
Mon-Thu (ref) Fri |
No relevant confounders identifiede |
58 / 2341 13 / 322 |
1 1.65 |
0.86 – 2.96 | 0.108 | No relevant confounders identifiede |
32 / 922 5 / 189 |
1 0.75 |
0.26 – 1.80 | 0.564 |
|
Textbook outcomef (yes) |
Mon-Thu (ref) Fri |
Alld |
1118 / 2341 166 / 322 |
1 1.12 |
0.87 – 1.44 | 0.369 | Allg,h |
502 / 922 101 / 189 |
1 0.95 |
0.68 – 1.33 | 0.777 |
aOdds Ratio.
b95% Confidence interval.
cClavien-Dindo grade III or higher.
dCorrected for: gender, age, preoperative weight loss, BMI, Charlson Comorbidity Index, ASA-score, previous esophageal or gastric surgery, tumor location, histology, clinical Tumor stage, clinical Node stage, neoadjuvant therapy, salvage surgery, hospital volume, year of surgery, type of esophagectomy, location of anastomosis and hospital identification number as random effect factor.
eGiven insufficient number of degrees of freedom for correction for all possible confounders, only confounders leading to a 10% change in OR were included for analyses. Hospital ID as random effect was added to the model in case the log-likelihood ratio test showed a better fit compared to the original univariable model.
fPatients undergoing a radical, curative resection with at least 15 resected lymph nodes, without intraoperative complication, severe postoperative complicationC, reintervention, readmission (to the ICU), mortality and a length of hospital stay shorter than 21 days.
gCorrected for: gender, age, preoperative weight loss, BMI, Charlson Comorbidity Index, ASA-score, previous esophageal or gastric surgery, tumor location, clinical Tumor stage, clinical Node stage, neoadjuvant therapy, hospital volume, year of surgery, type of gastrectomy, and hospital identification number as random effect factor.
hTumor location was removed due to multicollinearity with type of gastrectomy (variance inflation factor >2.5)