Table 2.

Positivity rates and mean Hb values of FIT in relation to location of adenomas, gender, and age in the group of 329 participants with a complete screening colonoscopy and available FIT results

 LocationGenderAge
TotalProximal onlya≥1 DistalaPbWomenMenPb<55 y≥55 yPb
Positivity rate, %
 100.0 ng/mL308.30.06415.80.0191.84.50.203
 50.0 ng/mL4.6011.70.0162.67.30.064.15.10.793
 27.5 ng/mL7.97.718.30.0125.710.90.09978.30.682
Concentration Hb, ng/mL
 In group with positive FIT470.7 ± 657.3None808.9 ± 847.0n/a95.5 ± 24.1770.9 ± 768.30.023239.7 ± 393.7805.8 ± 825.10.03
 In group with adenomas70.0 ± 315.73.0 ± 9.199.1 ± 375.20.00818.6 ± 2.8133.1 ± 439.60.12733.8 ± 173.6104.6 ± 407.20.303
 In group with adenomas ≥10 mm319.7 ± 643.89.3 ± 16.2381.7 ± 691.70.10626.1 ± 32.7686.6 ± 853.30.088146.2 ± 368.9493.1 ± 822.70.503
 In group with advanced adenomas153.1 ± 464.87.1 ± 13.9205.3 ± 534.20.08214.7 ± 26.3291.6 ± 634.80.63563.4 ± 244.6263.9 ± 633.50.303
  • aProximal group consists of subjects with proximal adenomas only, distal group of subjects with at least 1 distal adenoma, for the calculation of positivity rates subjects without colonic pathology were added to the proximal and the distal group, resulting in a total number of subjects of 269 and 303, respectively.

  • bOn the basis of χ2 forth comparison of positivity rates and on the Mann–Whitney U test for mean Hb stool concentration.