Table 5. Multivariate analysis among all ESCC patients.
| Variable | All ESCC patients (N=3,342) |
||
|---|---|---|---|
| RR | 95% CI | P | |
| Race/ethnicity | |||
| Chinese resident | 1.00 | – | – |
| Caucasians | 1.10 | 0.65-1.42 | 0.21 |
| Gender | |||
| Male | 1.00 | – | – |
| Female | 0.98 | 0.79-1.16 | 0.29 |
| Age group | |||
| <60 | 1.00 | – | – |
| 60~69 | 1.28 | 1.13-1.32 | <0.01 |
| 70+ | 2.49 | 2.22-2.86 | <0.01 |
| AJCC tumor stage | |||
| 1 | 1.00 | – | – |
| 2 | 1.18 | 0.65-1.62 | 0.34 |
| 3 | 6.21 | 5.47-6.89 | <0.01 |
| 4 | 13.50 | 11.32-15.80 | <0.01 |
| Primary site | |||
| Middle third of esophagus | 1.00 | – | – |
| Cervical esophagus | 0.98 | 0.70-1.12 | 0.29 |
| Upper third of esophagus | 1.09 | 0.60-1.49 | 0.38 |
| Lower third of esophagus | 1.16 | 0.74-1.44 | 0.16 |
| Overlapping lesion of esophagus | 0.95 | 0.78-1.10 | 0.14 |
| Esophagus, NOS | 1.03 | 0.89-1.15 | 0.10 |
ESCC, esophageal squamous cell carcinoma; AJCC, American Joint Commission on Cancer; RR, relative risk; CI, confidence interval.