Descriptive summaries* for primary and secondary outcomes
| TCBT n=186 | WCBT n=185 | TAU n=187 | All n=558 | |||||||||
| Mean | SD | n | Mean | SD | n | Mean | SD | n | Mean | SD | n | |
| IBS-SSS | ||||||||||||
| Baseline | 272.3 | 95.5 | 186 | 264.2 | 99.3 | 185 | 258.5 | 91.6 | 187 | 265.0 | 95.5 | 558 |
| 3 months | 174.0 | 98.6 | 148 | 179.1 | 104.2 | 138 | 236.5 | 97.1 | 141 | 196.3 | 103.7 | 427 |
| 6 months | 154.9 | 92.0 | 145 | 170.3 | 104.9 | 128 | 212.7 | 104.8 | 135 | 178.8 | 103.2 | 408 |
| 12 months | 139.0 | 94.8 | 136 | 163.0 | 108.8 | 124 | 205.6 | 100.5 | 131 | 168.9 | 104.8 | 391 |
| WSAS | ||||||||||||
| Baseline | 12.3 | 8.8 | 186 | 13.0 | 9.3 | 185 | 12.4 | 7.4 | 187 | 12.5 | 8.5 | 558 |
| 3 months | 8.4 | 7.8 | 149 | 9.4 | 8.2 | 138 | 12.1 | 8.2 | 140 | 9.9 | 8.2 | 427 |
| 6 months | 7.0 | 7.8 | 146 | 7.6 | 7.5 | 127 | 10.5 | 8.1 | 135 | 8.3 | 7.9 | 408 |
| 12 months | 6.0 | 7.5 | 138 | 7.4 | 7.7 | 124 | 10.8 | 9.3 | 132 | 8.1 | 8.5 | 394 |
| HADS distress | ||||||||||||
| Baseline | 16.1 | 6.9 | 186 | 17.0 | 7.3 | 185 | 16.0 | 6.4 | 187 | 16.4 | 6.9 | 558 |
| 3 months | 13.5 | 6.6 | 147 | 13.4 | 6.9 | 136 | 15.6 | 7.4 | 139 | 14.1 | 7.0 | 422 |
| 6 months | 12.4 | 6.7 | 123 | 12.7 | 6.9 | 115 | 15.2 | 7.3 | 120 | 13.4 | 7.1 | 358 |
| 12 months | 12.2 | 6.5 | 120 | 12.7 | 7.4 | 117 | 15.0 | 7.2 | 113 | 13.3 | 7.1 | 350 |
| Non-responder (%) | Responder (%) | n | Non-responder (%) | Responder (%) | n | Non-responder (%) | Responder (%) | n | Non-responder (%) | Responder (%) | n | |
| PEQ responders† | ||||||||||||
| 3 months | 55 (37.2) | 93 (62.8) | 148 | 71 (51.4) | 67 (48.6) | 138 | 128 (90.8) | 13 (9.2) | 141 | 254 (45.5) | 173 (31.0) | 427 |
| 6 months | 35 (24.0) | 111 (76.0) | 146 | 57 (44.9) | 70 (55.1) | 127 | 113 (83.1) | 23 (16.9) | 136 | 205 (50.1) | 204 (49.9) | 409 |
| 12 months | 30 (21.7) | 108 (78.3) | 138 | 56 (45.2) | 68 (54.8) | 124 | 101 (76.5) | 31 (23.5) | 132 | 187 (47.5) | 207 (52.5) | 394 |
| SGA responders‡ | ||||||||||||
| 3 months | 36 (24.2) | 113 (75.8) | 149 | 44 (31.9) | 94 (68.1) | 138 | 111 (79.3) | 29 (20.7) | 140 | 191 (44.7) | 236 (55.3) | 427 |
| 6 months | 28 (19.2) | 118 (80.8) | 146 | 32 (25.2) | 95 (74.8) | 127 | 95 (69.9) | 41 (30.1) | 136 | 155 (37.9) | 254 (62.1) | 409 |
| 12 months | 21 (15.2) | 117 (84.8) | 138 | 31 (25.0) | 93 (75.0) | 124 | 77 (58.3) | 55 (41.7) | 132 | 129 (32.7) | 265 (67.3) | 394 |
*Summaries were derived from the raw data.
†PEQ: responders are defined as those getting a score of 6 or more. PEQ is not recorded at baseline.
‡SGA: responders are defined as those getting a score between 1 and 3. SGA is not recorded at baseline.
HADS, Hospital Anxiety and Depression Scale; IBS-SSS, IBS Symptom Severity Score; PEQ, Patient Enablement Questionnaire; SGA, Subject’s Global Assessment of Relief; TAU, treatment as usual; TCBT, telephone-delivered CBT; WCBT, web-based CBT; WSAS, Work and Social Adjustment Scale.