Table 1.
Baseline Demographic and Clinical Characteristics of the Patients
| Characteristics | Subjects |
|---|---|
| ESCC | |
| Yes | 93 |
| No | 0 |
| Han nationality | |
| Yes | 93 |
| No | 0 |
| Region | |
| Inside Changzhi City | 93 |
| Outside Changzhi City | 0 |
| Family history | |
| Yes | 0 |
| No | 93 |
| Smoking | |
| Yes | 0 |
| No | 93 |
| Drinking | |
| Yes | 0 |
| No | 93 |
| Gender | |
| Male | 61 |
| Female | 32 |
| Age (years) | |
| >60 | 63 |
| ≤60 | 30 |
| BMI (kg/m2) | |
| <18.5 | 7 |
| ≥18.5 and ≤23.9 | 53 |
| ≥24 | 33 |
| Pre-existing hypertension | |
| Yes | 27 |
| No | 66 |
| Distance to incisors (cm) | |
| 20–30 | 35 |
| 30–40 | 37 |
| NA | 21 |
| Stage | |
| I–II | 40 |
| III–IV | 48 |
| NA | 5 |
| Differentiation | |
| Well | 8 |
| Moderate | 44 |
| Poor | 3 |
| NA | 38 |
| Tumor size (cm) | |
| ≤3.5 | 19 |
| >3.5 | 14 |
| NA | 60 |
| Lymphatic metastasis | |
| Positive | 35 |
| Negative | 58 |
Abbreviations: ESCC, esophageal squamous cell carcinoma; BMI, body mass index; NA, not available.