Table 1.
Baseline demographic and lifestyle characteristics of laryngeal squamous cell cancer patients.
| Covariates | Number of Patients/mean |
|---|---|
| No. individuals | 809 |
| Age at diagnosis (years), mean, range | 60.63, 27–89 |
| ≤40 | 15 |
| 40–60 | 416 |
| ≥60 | 378 |
| BMI (kg/m2), mean, range | 23.42, 16.72–28.43 |
| Male (%) | 100% |
| Death events | 186 |
| Duration of follow-up, mean, range (months) | 72.89, 3–116 |
| Smoking (yes/no) | 565/244 |
| Drinking (yes/no) | 307/462 |
| Hypertension (yes/no) | 226/583 |
| Tumor recurrence, mean, range (months) | 65, 1–116 |
| POSTOPERATIVE RADIOTHERAPY AND CHEMOTHERAPY | |
| Radiotherapy | 140 |
| Chemotherapy | 28 |
| None | 641 |
| T STAGE | |
| T1 | 195 |
| T2 | 325 |
| T3 | 237 |
| T4 | 52 |
| N STAGE | |
| N0 | 718 |
| N1 | 31 |
| N2−3 | 60 |
| TNM STAGE | |
| I | 195 |
| II | 300 |
| III | 214 |
| IV | 100 |
| HISTOLOGICAL DIFFERENTIATION | |
| Highly or moderately differentiated | 670 |
| Poorly differentiated | 22 |
| Not available | 117 |
| Tumor size, mean, range (cm) | 1.80, 0–6.5 |
| Tumor size (≤2 cm/>2 cm) | 511/298 |
| OPERATION THERAPY | |
| Total laryngectomy | 326 |
| Partial laryngectomy | 483 |
| TUMOR SUBSITE | |
| Supraglottic | 177 |
| Glottic | 621 |
| Subglottic | 11 |
| WBC, mean, range (109/l) | 6.24, 3.05–14.6 |
| RBC, mean, range (109/l) | 4.29,1.83–6.68 |
| Hg, mean, range(g/l) | 133.14, 61–174 |
| RDW, mean, range (%) | 13.15, 11.5–18.5 |
| LIVER FUNCTION | |
| AST, mean, range (u/l) | 20.46, 8-114 |
| ALT, mean, range (u/l) | 23.28, 4–143 |
| RENAL FUNCTION | |
| BUN, mean, range (mmol/l) | 6.00, 2.47–14.18 |
| Cr, mean, range (umol/l) | 74.15, 33–209 |
RDW, red cell distribution width, Cr, creatinine, BUN, urea nitrogen, AST, aspartate transaminase, ALT, alanine aminotransferase, Hg, hemoglobin, WBC, white blood cell, RBC, red blood cell count, BMI, body mass index.