Table 8.
Spearman correlations of IBS-D daily symptom diary at day 8 (a) IBS-QOL and (b) SF-12
| Concurrent measures | IBS-D Daily Symptom Diary itema | |||||
|---|---|---|---|---|---|---|
| Item 1 | Item 2 | Item 3 | Item 4 | Item 5 | Item 6 | |
| Abdominal pain | Stomach pain | Abdominal cramps | Abdominal pressure | Bloated | Frequency of gas | |
| IBS-QOLb | ||||||
| Dysphoria | −0.452 | −0.465 | −0.458 | −0.463 | −0.497 | −0.303 |
| Interference with activity | −0.427 | −0.455 | −0.442 | −0.437 | −0.478 | −0.283 |
| Body image | −0.424 | −0.403 | −0.411 | −0.436 | −0.55 | −0.334 |
| Health worry | −0.350 | −0.414 | −0.356 | −0.406 | −0.426 | −0.248 |
| Food avoidance | −0.364 | −0.405 | −0.370 | −0.403 | −0.428 | −0.257 |
| Social reaction | −0.410 | −0.419 | −0.379 | −0.397 | −0.464 | −0.320 |
| Sexual | −0.308 | −0.330 | −0.319 | −0.309 | −0.323 | −0.267 |
| Relationships | −0.413 | −0.392 | −0.417 | −0.391 | −0.391 | −0.303 |
| Overall | −0.469 | −0.486 | −0.470 | −0.481 | −0.532 | −0.347 |
| Total score | 0.553 | 0.552 | 0.525 | 0.542 | 0.573 | 0.319 |
| SF-12c | ||||||
| Physical functioning | −0.111 | −0.136 | −0.088 | −0.112 | −0.159 | −0.166 |
| Role physical | −0.269 | −0.286 | −0.254 | −0.271 | −0.277 | −0.262 |
| Bodily pain | −0.423 | −0.475 | −0.423 | −0.377 | −0.372 | −0.302 |
| General health | −0.155 | −0.154 | −0.114 | −0.136 | −0.102 | −0.147 |
| Vitality | −0.159 | −0.128 | −0.159 | −0.204 | −0.198 | −0.179 |
| Social functioning | −0.311 | −0.298 | −0.269 | −0.286 | −0.318 | −0.353 |
| Role emotional | −0.210 | −0.216 | −0.232 | −0.285 | −0.297 | −0.266 |
| Mental health | −0.245 | −0.208 | −0.260 | −0.284 | −0.302 | −0.247 |
| Physical component scale | −0.240 | −0.289 | −0.201 | −0.187 | −0.198 | −0.204 |
| Mental component scale | −0.231 | −0.199 | −0.239 | −0.283 | −0.313 | −0.272 |
Spearman correlation coefficients were generated between the IBS-D Daily Symptom Diary and concurrent measures
aIBS-D Daily Symptom Diary Items 1–5 are scored on a numeric rating scale from 0 to 10, with higher scores representing more severe symptoms. IBS-D Daily Symptom Diary Item 6 is scored on a five choice ordinal scale with higher scores representing more frequent gas
bIBS-QOL scores range from 0 to 100, with higher scores representing better health states. The IBS-SSS total score ranges from 0 to 500 with higher scores reflecting higher severity of IBS
cSF-12 scores range from 0 to 100, with higher scores representing better health states