Table 3:
Coefficients (and 95% CIs) from mixed-model multivariate regression assessing associations between baseline characteristics and operative time, with surgeon as random effect
| Characteristic | Beta | 95% CI | P value |
|---|---|---|---|
| Sex | |||
| Female | Reference group | ||
| Male | 0.29 | 0.04, 0.55 | 0.024 |
| Body mass index | 0.06 | 0.04, 0.08 | <0.001 |
| Previous neoadjuvant chemoradiation | 0.51 | 0.24, 0.78 | <0.001 |
| Tumor height (cm) | |||
| 0–5 | 0.50 | 0.14, 0.86 | 0.007 |
| 6–10 | 0.15 | −0.13, 0.43 | 0.3 |
| 11–15 | Reference group | ||
| cT stage | |||
| cT1/cT2 | Reference group | ||
| cT3 | −0.29 | −0.62, 0.04 | 0.084 |
| cT4 | −0.19 | −0.68, 0.30 | 0.5 |
| cTx | 0.37 | −0.75, 1.5 | 0.5 |
| Anterior tumor location | −0.09 | −0.35, 0.16 | 0.5 |
| Sacral height (cm) | 0.09 | 0.01, 0.18 | 0.029 |
| Pubic tubercle height (cm) | −0.07 | −0.31, 0.17 | 0.6 |
| Mesorectal area (cm2) | 0.02 | 0.01, 0.03 | <0.001 |
CI, confidence interval; BMI, body mass index, cT, clinical tumor.