(Abbreviation: a Spearman correlation coefficient)
(Hint: Both p and r values must be considered during analysis of the relationship between a variable and the correlation coefficients must be interpreted as follows: 0.0-0.30: negligible; 0.31-0.50: low; 0.51-0.70: moderate; 0.71-0.90: high; 0.91-1.00: very high)
Table 4. The performances of clinical variables for the estimation of survival.