Table 3

Positivity rate of the faecal immunochemical test (FIT) at different thresholds in participants who completed one, two, or three tests

FIT threshold
(µg/g)
TestAll
Completed test*Tested positive
nn(%)
40First5938343†(5.8)
Second‡5459245(4.5)
Third§4892195(4.0)
Over two testsCTA¶5802588(10.1)
PA**5938588(9.9)
Over three testsCTA††5480783(14.3)
PA‡‡5938783(13.2)
30First5938415(7.0)
Second‡5393293(5.4)
Third§4785238(5.0)
Over two testsCTA5808708(12.2)
PA**5938708(11.9)
Over three testsCTA5493946(17.2)
PA‡‡5938946(15.9)
20First5938545(9.2)
Second‡5274357(6.8)
Third§4616291(6.3)
Over two testsCTA5819902(15.5)
PA**5938902(15.2)
Over three testsCTA55181193(21.6)
PA‡‡59381193(20.1)
10First5938841(14.2)
Second‡4986487(9.8)
Third§4225384(9.1)
Over two testsCTA¶58571328(22.8)
PA**59381328(22.4)
Over three testsCTA55531712(30.8)
PA‡‡59381712(28.8)
  • *Participants who tested positive at a given threshold at year 1 or 2 were excluded from subsequent analyses.

  • †Three participants tested positive at year 1 during the pilot study based on faecal haemoglobin levels higher than 20 µg haemoglobin (Hb)/g but lower than the 40 µg Hb/g threshold used in the rest of the study. In this table, they only appear as FIT positive if their faecal haemoglobin levels met the stated thresholds.

  • ‡Includes participants who completed their second FIT, either at year 2 or 3.

  • §Includes participants who completed their third FIT.

  • ¶Includes participants who completed at least two FITs or who tested positive at year 1. Participants were classed as positive if they tested positive with either of their first two FITs.

  • **Includes participants who completed at least one FIT. Participants were classed as positive if they tested positive with either of their first two FITs.

  • ††Includes participants who completed all three FITs or who tested positive with any FIT. Participants were classed as positive if they tested positive with any FIT.

  • ‡‡Includes participants who completed at least one FIT. Participants were classed as positive if they tested positive with any FIT.

  • CTA, cumulative test analysis; PA, programme analysis.