Table 4

 Postal survey: characteristics of responders and non-responders

ParameterResponders (n = 233)Non-responders (n = 246)
Age (y) (mean (SD)51 (17)48 (18)
Sex (male, n (%))110 (47)132 (53)
Extent of disease (n (%))
    Proctitis 27 (19)27 (11)28 (11)
    Left sided 58 (47)58 (25)75 (30)
    Pancolitis 37 (28)37 (16)42 (17)
    Ileal 67 (39)34 (15)33 (13)
    Colonic 54 (31)25 (11)29 (12)
    Ileocolonic 48 (28)28 (12)20 (8)
    Indeterminate colitis12 (5)8 (4)
    Extent unknown12 (5)11 (4)