Table 5.
Impact of weekday of surgery, Tuesday through Friday versus Monday, 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) |
Tue-Fri (ref) Mon |
Alld |
563 / 1927 244 / 736 |
1 1.18 |
0.96 – 1.46 | 0.110 | No relevant confounders identifiede |
152 / 806 61 / 305 |
1 1.08 |
0.77 – 1.49 | 0.666 |
|
30-day/in-hospital mortality (yes) |
Tue-Fri (ref) Mon |
No relevant confounders identifiede |
47 / 1927 24 / 736 |
1 1.35 |
0.80 – 2.20 | 0.243 | No relevant confounders identifiede |
27 / 808 10 / 308 |
1 0.98 |
0.45 – 1.99 | 0.960 |
|
Textbook outcomef (yes) |
Tue-Fri (ref) Mon |
Alld |
958 / 1927 326 / 736 |
1 0.91 |
0.74 – 1.11 | 0.350 | Allg,h |
440 / 808 163 / 308 |
1 0.936 |
0.72 – 1.28 | 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)