Table 2.
Titration of visceral and somatic thresholds and moderate pain outside scanner
| Titration of stimulation thresholds outside scanner | IBS (N = 13) | Controls (N = 11) | p value | |
|---|---|---|---|---|
| Rectal distension (mmHg) | First perception | 18.0 (16.0–20.0) | 19.5 (16.8–22.1) | 0.22 |
| First pain | 31.5 (25.9–37.2) | 36.3 (28.6–44.0) | 0.27 | |
| Moderate paina | 40.1 (35.0–45.2) | 46.3 (39.4–53.3) | 0.12 | |
| Pain tolerance | 51.2 (46.3–55.0) | 55.0 (49.6–60.5) | 0.26 | |
| Foot heat (℃) | First perception | 38.4 (37.5–39.3) | 38.3 (37.4–39.2) | 0.77 |
| First pain | 42.3 (41.4–43.2) | 41.5 (40.3–42.6) | 0.20 | |
| Moderate paina | 44.5 (43.7–45.3) | 44.5 (43.6–45.5) | 0.94 | |
| Pain tolerance | 45.8 (45.0–46.5) | 45.8 (45.0–46.6) | 0.92 | |
Results expressed as mean (95% confidence interval).
a
Pain computerized visual analogue scale (COVAS) range from 30 to 55.