Table 3a.
VOCs in IBD: Unadjusted analysis of routinely analyzed VOCs for SIFT-MS quantification showed significant differences in 9 VOCs including isoprene, 1-decene, 1-heptene, 1-nonene, 1-octene, 3- methylhexane, (E)-2-nonene, ammonia, and hydrogen sulfide. The unadjusted values are presented as median [P25,P75] as the data was skewed.
| Factor (ppb) | Control (N=55) | IBD (N=62) | p-value |
|---|---|---|---|
| 2-propanol | 97.4[75.0,129.5] | 115.6[84.6,138.8] | 0.096 |
| acetaldehyde | 29.7[22.0,39.4] | 27.1[20.1,44.2] | 0.95 |
| acetone | 50.1[37.2,82.6] | 41.7[29.1,69.5] | 0.055 |
| acrylonitrile | 0.59[0.46,0.70] | 0.57[0.44,0.71] | 0.64 |
| benzene | 1.8[1.5,2.5] | 2.1[1.7,2.6] | 0.057 |
| carbon disulfide | 1.6[1.3,2.2] | 1.7[1.2,2.3] | 0.71 |
| dimethyl sulfide | 1.2[1.07,1.5] | 1.2[0.99,1.4] | 0.79 |
| ethanol | 171.2[104.5,259.9] | 167.9[108.1,413.8] | 0.37 |
| isoprene | 5.9[3.9,8.2] | 8.4[4.5,12.1] | 0.037 |
| pentane | 11.4[9.4,15.0] | 12.9[8.8,19.0] | 0.49 |
| 1-decene | 1.9[1.5,3.4] | 5.8[4.0,13.6] | <0.001 |
| 1-heptene | 5.8[4.2,8.3] | 7.9[6.0,10.5] | 0.009 |
| 1-nonene | 6.8[4.8,10.1] | 3.9[3.1,5.9] | <0.001 |
| 1-octene | 4.2[3.0,7.6] | 13.9[10.4,28.0] | <0.001 |
| 3-methylhexane | 13.3[10.2,20.5] | 16.4[12.4,42.5] | 0.004 |
| (E)-2-nonene | 12.7[10.2,18.9] | 1.8[1.4,2.6] | <0.001 |
| ammonia | 52.4[39.4,69.3] | 42.4[31.0,50.7] | 0.004 |
| ethane | 63.4[56.6,69.2] | 62.2[59.2,68.0] | 0.94 |
| hydrogen sulfide | 0.36[0.28,0.45] | 0.28[0.23,0.37] | <0.001 |
| triethyl amine | 0.63[0.49,0.90] | 0.62[0.50,0.78] | 0.57 |
| trimethyl amine | 3.6[2.8,4.7] | 3.3[2.5,4.1] | 0.32 |
Values presented as Median [P25, P75] with Kruskal-Wallis test.