Table 6.
Test–retest reliability—study week 1 and study week 4 (stable group)
| PRO score | N | Reliability–ICC (95 % confidence interval) |
|---|---|---|
| IBS-D Daily Symptom Diary weekly mean scores | ||
| Mean abdominal pain | 115 | 0.778 (0.695–0.841) |
| Mean stomach pain | 115 | 0.789 (0.708–0.849) |
| Mean abdominal cramps | 115 | 0.795 (0.717–0.854) |
| Mean abdominal pressure | 115 | 0.813 (0.740–0.866) |
| Mean bloated | 115 | 0.834 (0.769–0.882) |
| Mean frequency of gas | 115 | 0.655 (0.537–0.748) |
| Accidentsa | 160 | 0.174 (–0.165 to 0.513) |
| IBS-D Symptom Event Log weekly mean scores | ||
| Mean total events | 110 | 0.834 (0.766–0.883) |
| Mean immediacy | 110 | 0.642 (0.518–0.740) |
| Mean consistency | 110 | 0.659 (0.539–0.753) |
| Mean percent of completely empty bowels | 110 | 0.455 (0.294–0.591) |
a Test-retest was run for the “accidents” item between days 22 and 28