Table 1

 Characteristics of the study population

Number of patients (%)
Patients with two analysable tests (n = 10 673)Analysed patients (negative tests or analysable colonoscopy) (n = 10 431)
G-FOBT, guaiac faecal occult blood test.
The immunochemical faecal occult blood test (I-FOBT) was used at the usual cut-off value.
Sex (n (%))
    Male4553 (42.7)4427 (42.4)
    Female6120 (57.3)6004 (57.6)
Age
    Mean (SD) (y)62.1 (6.9)62.1 (6.9)
    50–54 (n (%))2020 (18.9)1991 (19.1)
    55–59 (n (%))2584 (24.2)2532 (24.3)
    60–64 (n (%))2052 (19.2)2001 (19.2)
    65–69 (n (%))2190 (20.5)2134 (20.5)
    70–74 (n (%))1827 (17.1)1773 (17.0)
FOBT (n (%))
    G-FOBT and/or I-FOBT positive886 (8.3)644 (6.2)
    G-FOBT positive260 (2.4)191 (1.8)
    I-FOBT positive733 (6.9)530 (5.1)
    I-FOBT and G-FOBT negative9787 (91.7)9787 (93.8)