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editorial
. 2015 Apr;7(4):566–575. doi: 10.3978/j.issn.2072-1439.2015.04.09

Table 8. Comparisons among different association measures for assessing the association between disease stage and carcinoembryonic antigen (CEA) level at diagnosis in colorectal cancer patients.

Estimate (95% CI) P value Clinical interpretation
Gamma statistics 0.337 (0.253 to 0.422) <0.01 CEA level significantly increased from stage I to IV
Kendall’s Tau 0.180 (0.133 to 0.227) <0.01 A significant linear increasing trend was observed between CEA level and stages
Spearman correlation 0.195 (0.144 to 0.246) <0.01 A significant linear increasing trend was observed between CEA level and stages