Volume, sulphur containing gas content, and odour intensity of individual flatus passages
| Sulphur containing gases | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H2S | MES | DMS | Total | Odour intensity | |||||||||||
| Source of sample | Total volume per passage (ml) | Concentration (μmol/l) | Volume (μl) | Concentration (μmol/l) | Volume (μl) | Concentration (μmol/l) | Volume (μl) | Concentration (μmol/l) | Volume (μl) | Judge 1 | Judge 2 | ||||
| All subjects | 107 (8.1) | 1.06 (0.20) | 3.12 (0.74) | 0.21 (0.04) | 0.59 (0.11) | 0.08 (0.01) | 0.22 (0.04) | 1.35 (0.23) | 3.93 (0.84) | 3.3 (0.3) | 5.6 (0.3) | ||||
| Men (n=10) | 119 (11.9) | 0.59 (0.14) | 2.30 (0.75) | 0.19 (0.04) | 0.63 (0.15) | 0.08 (0.01) | 0.22 (0.04) | 0.86 (0.16) | 3.16 (0.86) | 2.8 (0.3) | 5.1 (0.4) | ||||
| Women (n=6) | 88 (8.9) | 1.77 (0.43) | 4.33 (1.55) | 0.24 (0.05) | 0.54 (0.17) | 0.07 (0.02) | 0.22 (0.04) | 2.08 (0.49) | 5.06 (1.66) | 4.2 (0.6) | 6.7 (0.4) | ||||
| Gender difference (p value) | 0.055 | 0.003 | 0.180 | 0.438 | 0.666 | 0.878 | 0.789 | 0.007 | 0.269 | 0.019 | 0.016 | ||||
Data are expressed as mean (SEM) (n=87 total passages, n=52 passages in men, and n=35 passages in women).
Odour intensity was rated on a linear scale ranging from 0 (no odour) to 8 (very offensive).
MES, methanethiol; DMS, dimethyl sulphide.