Table 1.
Counts per second of the VOCs according to the Cancer Stages.
| Normal (N=17) | EGC (N=16) | AGC (N=10) | P value | |
|---|---|---|---|---|
| Propanal | 15127.0 [10963.7-27682.2] |
35272.2 [13154.2-54627.8] |
51243.3 [35154.9-62143.4] |
0.003 |
| Aceticamide | 942.5 [509.1-1243.0] |
1801.5 [558.0-3421.6] |
3070.6 [1734.2-4207.8] |
0.007 |
| Isoprene | 2096.0 [862.8-4857.4] |
5232.7 [2457.1-8432.7] |
6179.1 [3678.3-10149.3] |
0.020 |
| 1,3-propanediol | 37.9 [6.0-89.8] |
159.0 [54.3-294.5] |
216.7 95.3-429.9] |
0.025 |
| Ethylene | 658.0 [518.0-1439.0] |
413.5 [160.5-692.0] |
569.0 [238.0-610.0] |
0.137 |
| Methyl isobutyl ketone | 92.0 [82.0-99.0] |
61.5 [28.0-102.0] |
64.5 [36.0-83.0] |
0.098 |
| Acetic acid | 18.0 [13.0-25.0] |
11.5 [7.5-15.5] |
14.0 [8.0-15.0] |
0.050 |
| m-Tolualdehyde | 95.0 [67.0-138.0] |
40.0 [24.5-104.0] |
49.5 [33.0-65.0] |
0.021 |
| 1,3,5-trimethylbenzene | 92.0 [54.0-138.0] |
36.0 [25.5-96.5] |
50.5 [32.0-66.0] |
0.016 |
The median values were presented and the numbers in square brackets mean ranges. Chi square test was used to evaluate between-group differences in categorical variables and a p value < 0.05 was deemed to indicate statistical significance. EGC, Early gastric cancer; AGC, Advanced gastric cancer.