Table 2.
Demographic and clinical characteristics of patients in the mortality by Cox-proportional hazard regression analysis with stepwise model (n = 3284).
| Variables | aHRb | 95% C.I.b | p Valuea |
|---|---|---|---|
| Demographics | |||
| Age, years (ref. = < 50) | |||
| 50–59 | 1.22 | 1.03–1.45 | 0.021 |
| 60–69 | 1.38 | 1.19–1.62 | < 0.001 |
| 70–79 | 1.63 | 1.40–1.89 | < 0.001 |
| ≥ 80 | 2.15 | 1.83–2.54 | < 0.001 |
| Sex (ref. = female) | |||
| Male | 1.19 | 1.09–1.30 | < 0.001 |
| Social economic status (ref. = Non-income)c | |||
| Low | 0.84 | 0.72–0.97 | 0.020 |
| Middle | 0.90 | 0.78–1.02 | 0.105 |
| High | 0.69 | 0.58–0.83 | < 0.001 |
| Melanoma site (ref. = Head and neck) | |||
| Trunk | 1.10 | 0.92–1.32 | 0.277 |
| Upper limb | 0.92 | 0.76–1.12 | 0.426 |
| Lower limb | 0.97 | 0.85–1.10 | 0.636 |
| Unspecific | 1.27 | 1.10–1.46 | 0.001 |
| Comorbidity (ref. = No) | |||
| Cerebral vascular disease | 1.22 | 1.07–1.38 | 0.002 |
| Malignancy | 2.13 | 1.95–2.33 | < 0.001 |
| Clinical surgery (ref. = No) | |||
| Sentinel lymph node biopsy | 0.84 | 0.76–0.93 | 0.001 |
| Lymph node dissection | 1.15 | 1.02–1.30 | 0.022 |
aUsing Cox proportional hazard model. Bold type indicates statistical significantly (P < 0.05).
bAbbreviations: aHR adjusted hazard ratio, C.I. confidence interval.
cSocial economic status was classified as non-income (no income), low (income ranges from 1 to 583 US$ per month), middle (income ranges from 584 to 833 US$ per month) and high (income ≥ 834 US$ per month) categories.