Roel Bogie

Chapter 4

Table 4.4: Metachronous lesions in patients with LSTs and patients with LP-CRNs at index. | Patients without any follow-up were excluded. P values after correction for number of follow-up colonoscopies and number of neoplasms at index.

Clinical features during follow up

Patients with ≥1 neoplastic LST(n=88)

Patients with ≥1 LP-CRN (no LSTs) (n=260)

P value

Patients with ≥1 CRN (%) Mean number of CRNs (SD) Patients with ≥ 1 adenoma (%) Mean number of adenomas (SD) Patients with ≥ 1 CRN with SMI (%) Mean number of CRNs with SMI (SD) Patients with ≥ 1 CRN with HGD/SMI (%)

63 (71.6)

141 (54.2) 1.45 (2.36) 134 (51.5) 1.24 (1.93)

0.050† 0.002‡ 0.015† 0.032‡ 0.824† 0.411‡

2.80 (4.99)

63 (71.6)

1.82 (2.09)

1 (1.1)

5 (1.9)

0.01 (0.11)

0.02 (0.14)

32 (36.4)

41 (15.8)

<0.001†

Mean number of CRNs with HGD/SMI (SD) 0.51 (1.03)

0.22 (0.57)

0.002‡

Patients with ≥ 1 non-polypoid CRN (%)

39 (44.3)

52 (20.0)

<0.001† <0.001‡

Mean number of non-polypoid CRNs (SD) 1.16 (2.73)

0.34 (0.90)

†Logistic regression model ‡Poisson regression corrected for zero-inflation. CRN: colorectal neoplasm, HGD: high grade dysplasia, SMI: submucosal invasion.

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