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. 2018 Jun 6;9(13):2295–2301. doi: 10.7150/jca.24838

Table 2.

Univariate and multivariate analyses of overall survival for the 2,318 patients with nasopharyngeal carcinoma

Variable Univariate analysis Multivariate analysis
HR (95% CI) P HR (95% CI) P
Age at diagnosis (years)
≥ 45 vs. < 45 1.265 (1.038-1.541) 0.020 1.327 (1.087-1.620) 0.005
Smoking status
Yes vs. no 1.100 (0.893-1.354) 0.369
Overall stage (7th)
III - IV vs. I - II 2.758 (1.794-4.241) < 0.001 1.778 (1.052-3.007) 0.032
T category
T1 1 (reference) < 0.001 1 (reference) < 0.001
T2 2.088 (1.134-3.846) 1.784 (0.965-3.300)
T3 1.910 (1.064-3.428) 1.393 (0.754-2.574)
T4 3.456 (1.913-6.243) 2.493 (1.339-4.643)
N category
N0 1(reference) < 0.001 1 (reference) < 0.001
N1 1.913 (1.572-2.326) 1.316 (1.078-1.606)
N2 1.927 (1.514-2.452) 1.613 (1.244-2.092)
N3 2.209 (1.727-2.827) 1.866 (1.430-2.436)
Treatment
RT vs. CT + RT 1.310 (1.053-1.628) 0.015 1.773 (1.429-2.201) < 0.001
EBV DNA (copies mL-1)
≥ 2,560 vs. < 2,560 1.850 (1.508-2.268) < 0.001 1.434 (1.174-1.753) < 0.001
Hemoglobin (g/L)
< 120 vs. ≥ 120 1.123 (0.838-1.504) 0.437
Albumin (g/L)
< 45 vs. ≥ 45 1.187 (0.973-1.448) 0.090
BMI (Kg/m2)
< 18.5 1 (reference) 0.031 1 (reference) 0.470
18.5-25 1.570 (1.029-2.397) 1.051 (0.621-1.779)
≥ 25 1.323 (1.046-1.674) 0.743 (0.344-1.603)
RDW
> 13.55 vs. ≤ 13.55 1.288 (1.022-1.623) 0.032 1.121 (0.850-1.478) 0.418
COR-BMI
0 1 (reference) 0.007 1 (reference) 0.013
1 1.311 (1.022-1.682) 1.239 (1.012-1.590)
2 2.403 (1.335-4.323) 2.367 (1.311-4.274)

Abbreviations: COR-BMI = Combination of red blood cell distribution width and body mass index; CI = confidence interval; HR = hazard ratio; N = node; T = tumor; multivariate analyses adjusted for age, overall stage, T category, N category, treatment, EBV DNA copy number, hemoglobin, albumin, NLR and COR-BMI.