Table 3.
Univariate Analysis of Prognostic Factors in Patients with Nasopharyngeal Carcinoma
| Variable | Univariate Analysis | ||
|---|---|---|---|
| HR | 95% CI | P-value† | |
| Overall survival | |||
| Age (>45 years vs ≤45 years) | 1.61 | 1.34–1.94 | <0.001 |
| Sex (Female vs Male) | 0.74 | 0.59–0.93 | 0.010 |
| Smoking (Yes vs No) | 1.41 | 1.17–1.69 | <0.001 |
| Drinking (Yes vs No) | 1.10 | 0.83–1.45 | 0.501 |
| Family history of cancer (Yes vs No) | 0.86 | 0.69–1.06 | 0.147 |
| Serum calcium level (Low vs High) | 1.33 | 1.10–1.61 | 0.003 |
| WHO type (II+III vs I) | 0.48 | 0.18–1.29 | 0.146 |
| TNM stage (III–IV vs I–II) | 2.94 | 2.20–3.93 | <0.001 |
| Chemotherapy (No vs Yes) | 2.12 | 1.51–2.96 | <0.001 |
| Disease-free survival | |||
| Age (>45 years vs ≤45 years) | 1.44 | 1.22–1.69 | <0.001 |
| Sex (Female vs Male) | 0.79 | 0.65–0.97 | 0.020 |
| Smoking (Yes vs No) | 1.33 | 1.13–1.57 | 0.001 |
| Drinking (Yes vs No) | 1.21 | 0.96–1.53 | 0.107 |
| Family history of cancer (Yes vs No) | 0.83 | 0.69–1.00 | 0.046 |
| Serum calcium level (Low vs High) | 1.23 | 1.05–1.45 | 0.012 |
| WHO type (II+III vs I) | 0.49 | 0.20–1.18 | 0.113 |
| TNM stage (III–IV vs I–II) | 2.24 | 1.78–2.82 | <0.001 |
| Chemotherapy (No vs Yes) | 1.68 | 1.28–2.19 | <0.001 |
| Distant metastasis-free survival | |||
| Age (>45 years vs ≤45 years) | 1.21 | 0.97–1.52 | 0.089 |
| Sex (Female vs Male) | 0.65 | 0.48–0.86 | 0.003 |
| Smoking (Yes vs No) | 1.47 | 1.17–1.83 | 0.001 |
| Drinking (Yes vs No) | 1.23 | 0.89–1.69 | 0.203 |
| Family history of cancer (Yes vs No) | 0.92 | 0.71–1.18 | 0.487 |
| Serum calcium level (Low vs High) | 1.39 | 1.11–1.75 | 0.004 |
| WHO type (II+III vs I) | 1.49 | 0.21–10.61 | 0.691 |
| TNM stage (III–IV vs I–II) | 2.81 | 1.99–3.96 | <0.001 |
| Chemotherapy (No vs Yes) | 1.90 | 1.29–2.80 | 0.001 |
| Relapse-free survival | |||
| Age (>45 years vs ≤45 years) | 1.19 | 0.93–1.52 | 0.177 |
| Sex (Female vs Male) | 1.06 | 0.80–1.26 | 0.672 |
| Smoking (Yes vs No) | 0.97 | 0.75–1.70 | 0.822 |
| Drinking (Yes vs No) | 1.10 | 0.76–1.59 | 0.625 |
| Family history of cancer (Yes vs No) | 0.77 | 0.57–1.03 | 0.076 |
| Serum calcium level (Low vs High) | 0.93 | 0.72–1.19 | 0.540 |
| WHO type (II+III vs I) | 0.25 | 0.09–0.68 | 0.006 |
| TNM stage (III–IV vs I–II) | 1.54 | 1.13–2.11 | 0.007 |
| Chemotherapy (No vs Yes) | 1.69 | 1.12–2.56 | 0.013 |
Note: †P value was calculated using the univariate Cox proportional hazards model.
Abbreviations: WHO, World Health Organization; HR, hazard ratio; 95% CI, 95% confidence interval.