Univariate and multivariate Cox regression analysis of neutrophil gelatinase-associated lipocalin (NGAL) status
| NGAL status | Mean survival time (months) | Percentage of 5-year survival (95% CI) | p Value |
| Univariate | |||
| Negative (−) | 74.7 | 49.8% (3 to 115) | 0.000** |
| Weak positive (+) | 47.7 | 33.2% (5 to 107) | |
| Strong positive (++) | 38.1 | 24.4% (4 to 104) | |
| Multivariate | |||
| HR | 95% CI | p Value | |
| Differentiation grade | 1.607 | 1.2 to 2.2 | 0.005** |
| Location | 0.643 | 0.4 to 0.9 | 0.017* |
| TNM stage | 1.772 | 1.1 to 2.9 | 0.022* |
| NGAL status | 1.893 | 1.5 to 2.4 | 0.000** |
NGAL status: −, scores of 0–4; +, scores of 5–8; ++, scores of 9–12.
*p<0.05; **p<0.01.
TNM, tumour, node, metastasis.