Table 1

Baseline characteristics of included patients and polyps

Patient
(n=325)
Male gender, n (%)198 (60.9)
Age in years, median (IQR)69 (63–75)
LNPCP
(n=343)
Location
 Proximal colon181 (52.8)
 Distal colon78 (22.7)
 Rectum84 (24.5)
Size in mm, median (IQR), range30 (25–40), 20–120
Histology
 Non-invasive polyps
  Adenoma
   LGD226 (65.9)
   HGD55 (16.0)
  SSA/P or TSA
   Without dysplasia5 (1.5)
    With dysplasia7 (2.1)
  Hamartoma*1 (0.3)
 Invasive polyps
  T1 CRC36 (10.5)
   Superficial submucosal invasion11 (3.2)
   Deep submucosal invasion19 (5.5)
   Invasion depth unable to determine6 (1.7)
  T2 CRC7 (2.0)
  T3 CRC4 (1.2)
 No histology available†2 (0.6)
  • Some patients had more than one LNPCP resulting that the number of patients and LNPCPs do not match.

  • *Excluded from the analyses as this is a distinct polyp category.

  • †In two patients, the polyp was not removed due to comorbidity resulting that no histology was available. These LNPCPs were excluded from further analyses.

  • CRC, colorectal cancer; HGD, high-grade dysplasia; LGD, low-grade dysplasia; LNPCP, large non-pedunculated colorectal polyp; SSA/P, sessile serrated adenoma/polyp; TSA, traditional serrated adenoma.