Table 2.
Demographic and clinical characteristics stratified by MPR
| MPR (Yes/No) | No | Yes | P | |
|---|---|---|---|---|
| Sex | Female | 0 (0.0) | 6 (50.0) | 0.234 |
| Male | 4 (100.0) | 6 (50.0) | ||
| Age (yr) | Median (IQR) | 58.0 (53.8 to 66.8) | 62.5 (57.2 to 69.0) | 0.952 |
| Smoking | Never smoker | 1 (25.0) | 3 (25.0) | 1.000 |
| Smoker | 3 (75.0) | 9 (75.0) | ||
| Time to surgery (d) | Median (IQR) | 48.5 (37.5 to 56.5) | 46.0 (44.2 to 47.8) | 0.951 |
| Radiation dosage | 18 | 3 (75.0) | 4 (33.3) | 0.262 |
| 24 | 1 (25.0) | 8 (66.7) | ||
| T stage | T2 | 0 (0.0) | 0 (0.0) | 0.529 |
| T3 | 0 (0.0) | 3 (25.0) | ||
| T4 | 4 (100.0) | 9 (75.0) | ||
| N stage | N0 | 0 (0.0) | 3 (25.0) | 0.769 |
| N1 | 1 (25.0) | 4 (33.3) | ||
| N2 | 3 (75.0) | 5 (41.7) | ||
| Alcohol history | ≤20 yr | 0 (0.0) | 4 (33.3) | 0.209 |
| >20 yr | 3 (75.0) | 3 (25.0) | ||
| No alcohol | 0 (0.0) | 2 (16.7) | ||
| (Missing) | 1 (25.0) | 3 (25.0) | ||
| Location | Gingiva | 0 (0.0) | 3 (25.0) | 0.140 |
| Hard palate | 0 (0.0) | 1 (8.3) | ||
| Larynx | 0 (0.0) | 2 (16.7) | ||
| Retromolar Trigone | 2 (50.0) | 0 (0.0) | ||
| Tongue | 2 (50.0) | 6 (50.0) | ||
| Previous RT (yes/no) | No | 3 (75.0) | 9 (75.0) | 1.000 |
| Yes | 1 (25.0) | 3 (25.0) |
The associations between MPR and demographic and clinical characteristics were evaluated with two-sided nonparametric Wilcoxon rank sum test for continuous variables, and with two-sided Fisher’s exact test for categorical variables. No multiple comparison adjustment.