Table 1

Main characteristics of the screening results, overall and by screening round

RoundAllIIIIIIIVVVIP value*
Invited (n)526 644178 828107 25383 81366 86253 12436 764
Screened (n)441 647123 34796 12978 77063 06950 44129 891
Participation rate (%)83.969.089.694.094.394.981.3
Gender (% of males screened)46.647.746.746.345.845.645.5<0.0001
Age (mean)61.159.160.361.462.463.564.5<0.0001
FIT positive (n)18 179701534332624211218561139
Crude FIT positivity (%)4.15.73.63.33.33.73.8<0.0001
Compliance with colonoscopy (n)16 954641932272485200417511068
Compliance with colonoscopy (%)93.391.594.094.794.994.393.8<0.0001
Lesions diagnosed (n)
 Colorectal cancer78141216275614625
 Advanced adenoma47131958813647540457298
 Non-advanced adenoma2844919560475348343199
Crude detection rate (×1000 subjects screened) for:
 Colorectal cancer1.773.341.690.950.970.910.84<0.0001
 Advanced adenoma10.715.98.58.28.69.110.0<0.0001
 Non-advanced adenoma6.47.55.86.05.56.86.7<0.0001
Crude PPV on colonoscopy for advanced neoplasia (%)32.436.930.229.130.028.730.2<0.0001
Number needed to screen to detect one case of advanced neoplasia80.452.098.6109.1104.9100.392.5<0.0001
Number needed to scope to detect one case of advanced neoplasia3.12.73.33.43.33.53.3<0.0001
  • Advanced neoplasia: colorectal cancer or advanced adenoma.

  • *Comparison of screening rounds using Pearson’s χ2 test and Snedecor’s F for homogeneity of proportions, as appropriate.

  • FIT, faecal immunochemical test; PPV, positive predictive value.