Table 1. Normality test results of eight individual tumor markers.
| Tumor markers | N | Kolmogorov–Smirnov | Shapiro–Wilk | ||
|---|---|---|---|---|---|
| Statistic | P | Statistic | P | ||
| AFP | Gastric cancer (n = 268) | 0.448 | 0.000 | 0.212 | 0.000 |
| Control (n = 209) | 0.194 | 0.000 | 0.690 | 0.000 | |
| NSE | Gastric cancer (n = 268) | 0.322 | 0.000 | 0.295 | 0.000 |
| Control (n = 209) | 0.117 | 0.000 | 0.885 | 0.000 | |
| FER | Gastric cancer (n = 268) | 0.174 | 0.000 | 0.820 | 0.000 |
| Control (n = 209) | 0.102 | 0.000 | 0.934 | 0.000 | |
| CEA | Gastric cancer (n = 268) | 0.363 | 0.000 | 0.455 | 0.000 |
| Control (n = 209) | 0.185 | 0.000 | 0.662 | 0.000 | |
| CA125 | Gastric cancer (n = 268) | 0.371 | 0.000 | 0.397 | 0.000 |
| Control (n = 209) | 0.291 | 0.000 | 0.366 | 0.000 | |
| CA153 | Gastric cancer (n = 268) | 0.314 | 0.000 | 0.341 | 0.000 |
| Control (n = 209) | 0.192 | 0.000 | 0.714 | 0.000 | |
| CA199 | Gastric cancer (n = 268) | 0.364 | 0.000 | 0.488 | 0.000 |
| Control (n = 209) | 0.146 | 0.000 | 0.800 | 0.000 | |
| CA242 | Gastric cancer (n = 268) | 0.370 | 0.000 | 0.441 | 0.000 |
| Control (n = 209) | 0.157 | 0.000 | 0.700 | 0.000 | |
| lg(AFP) | Gastric cancer (n = 268) | 0.101 | 0.000 | 0.877 | 0.000 |
| Control (n =209) | 0.117 | 0.000 | 0.945 | 0.000 | |
| lg(NSE) | Gastric cancer (n = 268) | 0.145 | 0.000 | 0.815 | 0.000 |
| Control (n = 209) | 0.050 | 0.200 | 0.987 | 0.049 | |
| lg(FER) | Gastric cancer (n = 268) | 0.086 | 0.000 | 0.959 | 0.000 |
| Control (n = 209) | 0.115 | 0.000 | 0.909 | 0.000 | |
| lg(CEA) | Gastric cancer (n = 268) | 0.151 | 0.000 | 0.886 | 0.000 |
| Control (n = 209) | 0.060 | 0.065 | 0.988 | 0.078 | |
| lg(CA125) | Gastric cancer (n = 268) | 0.185 | 0.000 | 0.845 | 0.000 |
| Control (n = 209) | 0.091 | 0.000 | 0.911 | 0.000 | |
| lg(CA153) | Gastric cancer (n = 268) | 0.117 | 0.000 | 0.930 | 0.000 |
| Control (n = 209) | 0.096 | 0.000 | 0.978 | 0.003 | |
| lg(CA199) | Gastric cancer (n = 268) | 0.149 | 0.000 | 0.898 | 0.000 |
| Control (n = 209) | 0.039 | 0.200 | 0.992 | 0.279 | |
| lg(CA242) | Gastric cancer (n = 268) | 0.186 | 0.000 | 0.830 | 0.000 |
| Control (n = 209) | 0.047 | 0.200 | 0.984 | 0.015 | |
Note:
All biomarkers had skewed distribution (p < 0.001). Only CA199 and CEA in the control group could be transformed into normal distribution by logarithmic transformation.