Table 4 Factors independently associated with colorectal surgery and colectomy in the logistic regression analysis

Sex (n = 15,707)

• Male

1

1

• Female

2.10 (1.52–2.91)

2.21 (1.54–3.16)

Age (n = 15,707)

• < 60 years

1

1

• ≥60 years

1.57 (1.11–2.23)

1.93 (1.30–2.89)

European guidelines classification (n = 15,707)

• No adenoma

1

1

• Low risk

1.43 (0.36–5.75)

1.07 (0.24–4.78)

• Intermediate risk

5.63 (1.89–16.80)

5.33 (1.77–16.03)

• High risk

67.94 (24.87–185.59)

53.21 (19.36–146.18)

Endoscopist’s ADR (n = 15,459)

• Q1 (≤60%)

1

1

• Q2 (60–65.3%)

0.71 (0.44–1.14)

0.58 (0.34–1.00)

• Q3 (65.3–70.8%)

0.44 (0.27–0.71)

0.48 (0.29–0.79)

• Q4 (> 70.8%)

0.44 (0.28–0.68)

0.37 (0.23–0.61)

Complexity of hospital (n = 15,707)

• Second level

1

1

• Third level

0.54 (0.38–0.79)

0.57 (0.38–0.85)