Investigation | Total number of patients (n=577) | Number with organic disease |
Anorectal physiology studies | 32 (5.5) | 6 (18.8)* |
Colonoscopy or CT pneumocolon (%) | 102 (17.7) | 1 (1.0) |
Elastase (%) | 18 (3.1) | 3 (16.7) |
Flexible sigmoidoscopy (%) | 24 (4.2) | 0 (0) |
SeHCAT scan (%) | 99 (17.2) | 14 (14.1)† |
*All these patients were also felt to have IBS with constipation and the diagnosis was not revised in any individual.
†There were a further four patients with mild bile acid diarrhoea (SeHCAT retention between 10.0% and 14.9%); if these individuals are included the proportion increases to 18.2%.
SeHCAT, 23-seleno-25-homo-tauro-cholic acid.