Table 5.
Intensities of the peaks for different categories of the tumor characteristics
| M/z 4276 | M/z 4292 | M/z 8129 | M/z 8941 | ||
| n |
Median intensity (IQR) |
Median intensity (IQR) |
Median intensity (IQR) |
Median intensity (IQR) |
|
| TNM stage | |||||
| IIA | 26 | 13.00 (1.79–83.10) |
19.51 (8.07–54.23) |
26.27 (23.48–30.07) |
33.56 (24.09–50.43) |
| IIB | 10 | 4.97 (1.33–17.24) |
11.44 (4.83–15.79) |
25.44 (16.56–27.75) |
30.49 (20.16–34.59) |
| III | 11 | 11.88 (4.89–24.69) |
15.86 (9.88–22.87) |
25.70 (15.68–26.54) |
37.55 (25.26–47.29) |
| p-value* | 47 | .340 | .211 | .203 | .473 |
| p-trend# | 47 | .553 | .368 | .075 | .667 |
| Tumor size | |||||
| 0.5–2 cm | 18 | 10.24 (1.36–85.58) |
18.44 (5.44–63.09) |
26.53 (22.86–30.08) |
30.48 (23.24–61.21) |
| > 2 cm | 29 | 11.88 (3.97–24.51) |
12.21 (8.71–24.28) |
25.90 (19.08–27.45) |
32.90 (24.04–44.16) |
| p-value† | 47 | .844 | .526 | .204 | .896 |
| Lymph node involvement | |||||
| No | 9 | 24.34 (5.99–72.28) |
25.69 (9.91–54.35) |
26.48 (23.33–30.29) |
38.92 (27.68–53.99) |
| Yes | 38 | 8.66 (1.87–24.37) |
13.13 (5.97–23.74) |
25.81 (18.87–27.65) |
30.49 (23.30–43.31) |
| p-value† | 47 | .137 | .144 | .224 | .224 |
| Differentiation | |||||
| High-Intermediate | 25 | 11.04 (2.99–24.47) |
14.06 (7.86–22.52) |
25.72 (19.84–27.45) |
31.27 (24.13–42.65) |
| Low | 21 | 19.90 (2.98–60.12) |
17.06 (8.71–44.18) |
26.54 (19.68–29.79) |
28.99 (23.34–45.88) |
| p-value† | 46 | .635 | .384 | .360 | .903 |
M/z = Mass to Charge ratio, IQR = Inter-Quartile Range, * Kruskal Wallis Test, # Jonckheere-Terpstra Test, † Mann-Whitney U Test