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)
GenderFemale (%)139 (74.7)145 (78.4)139 (74.3)423 (75.8)
Ethnicity (%)White162 (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 IBSCount (%)20 (10.7)15 (8.1)22 (11.8)57 (10.2)
Years of symptoms before diagnosisn/Median186/3.3185/3.0187/3.0558/3.0
Range0.0–47.00.0–40.00.0–40.00.0-47.0
Duration of IBS (years)n/Median185/6.5185/8.6187/6.3557/7.4
Range1.0–65.00.7–45.40.3–49.90.3–64.6
HADS anxiety scoreMean (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 scoreMean (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 diarrhoean (%)60 (32.3)60 (32.4)58 (31.0)178 (31.9)
IBS constipationn (%)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 unclassifiedn (%)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.