Table 1 Characteristics of screening participants who underwent colonoscopy after a positive fecal immunochemical (FIT) result.

Characteristic	Colonoscopy (n=116362)	PCCRCs (n=432)
IQR, interquartile range; Hb, hemoglobin; PCCRC, post-colonoscopy colorectal cancer. * Advanced adenomas had a size ≥10mm and/or at least 25% villous histology and/or high grade dysplasia. † CRC location was only available for PCCRCs.
Age, median (IQR), years	67 (63–70)	67 (65–75)
Sex, male, n (%)	69943 (60.1)	260 (60.2)
FIT value, median (IQR), µg Hb/g feces	135 (70–201)	135 (75–201)
Most advanced finding at index colonoscopy, n (%)
Colorectal cancer	9978 (8.6)	0 (0.0)
Advanced adenoma*	41982 (36.1)	194 (44.9)
Non-advanced adenoma	34552 (29.7)	124 (28.7)
Serrated lesion	3869 (3.3)	15 (3.5)
No lesion	18101 (15.6)	59 (13.7)
Unknown/other	7880 (6.8)	40 (9.3)
Time to PCCRC diagnosis, median (IQR), months		31 (19–39)
Location, n (%)†
Right		233 (53.9)
Cecum		68 (15.7)
Ascending colon		89 (20.6)
Hepatic flexure		26 (6.0)
Transverse colon		33 (7.6)
Splenic flexure		17 (3.9)
Left		99 (22.9)
Descending colon		18 (4.2)
Sigmoid		71 (16.4)
Rectosigmoid		10 (2.3)
Rectum		89 (20.6)
Unknown		11 (2.5)