Table 1.
Demographic and clinical characteristics of the study sample at baseline (n=558)
| TCBT n=186 |
WCBT n=185 |
TAU n=187 |
All n=558 |
||
| Age (years) | Mean (SD) | 43.4 (12.5) | 43.8 (13.6) | 42.0 (13.5) | 43.1 (13.2) |
| Gender | Female (%) | 139 (74.7) | 145 (78.4) | 139 (74.3) | 423 (75.8) |
| Ethnicity (%) | White | 162 (87.1) | 171 (92.4) | 174 (93.0) | 507 (90.9) |
| Deprivation score34 | Mean (SD) | 16.7 (12.0) | 17.3 (12.3) | 17.2 (11.8) | 17.1 (12.0) |
| Seen a GI consultant for IBS | Count (%) | 20 (10.7) | 15 (8.1) | 22 (11.8) | 57 (10.2) |
| Years of symptoms before diagnosis | n/Median | 186/3.3 | 185/3.0 | 187/3.0 | 558/3.0 |
| Range | 0.0–47.0 | 0.0–40.0 | 0.0–40.0 | 0.0-47.0 | |
| Duration of IBS (years) | n/Median | 185/6.5 | 185/8.6 | 187/6.3 | 557/7.4 |
| Range | 1.0–65.0 | 0.7–45.4 | 0.3–49.9 | 0.3–64.6 | |
| HADS anxiety score | Mean (SD) | 10.6 (4.3) | 11.1 (4.3) | 10.5 (4.0) | 10.7 (4.2) |
| Case*/n (%) | 89/186 (47.9) | 98/185 (53.0) | 96/187 (51.3) | 283/558 (50.7) | |
| HADS depression score | Mean (SD) | 5.5 (3.6) | 5.9 (3.8) | 5.6 (3.5) | 5.7 (3.7) |
| Case*/n (%) | 47/186 (25.3) | 60/185 (32.4) | 50/187 (26.7) | 157/558 (28.1) | |
| IBS subtype | |||||
| IBS diarrhoea | n (%) | 60 (32.3) | 60 (32.4) | 58 (31.0) | 178 (31.9) |
| IBS constipation | n (%) | 26 (14.0) | 23 (12.4) | 27 (14.5) | 76 (13.6) |
| IBS alternating† | n (%) | 93 (50.3) | 98 (53.0) | 96 (51.3) | 287 (51.5) |
| IBS unclassified | n (%) | 6 (3.2) | 4 (2.2) | 6 (3.2) | 16 (2.9) |
*HADS case of anxiety defined as scoring ≧10/21 and depression as scoring ≧7/21 on subscale.
†IBS-A or alternating is also referred to as IBS-M or mixed.
HADS, Hospital Anxiety and Depression Scale; IMD, index of multiple deprivation; TAU, treatment as usual; TCBT, telephone-delivered CBT; WCBT, web-based CBT.