Table 1 Baseline characteristics and surgery rate according to dependent variables
Patients not requiring surgery (n = 15,545) | Surgery (n = 162) | Surgery rate % (95% CI) | Significancea | ||
|---|---|---|---|---|---|
Sex (n = 15,707) | • Female | 6708 (43.2%) | 72 (44.4%) | 1.06 (0.82–1.31) | 0.7 |
• Male | 8837 (56.8%) | 90 (55.6%) | 1.01 (0.80–1.22) | ||
Age (n = 15,707) | • < 60 years | 6855 (44.1%) | 48 (29.6%) | 0.69 (0.50–0.89) | < 0.001 |
• ≥60 years | 8690 (55.9%) | 114 (70.4%) | 1.29 (1.06–1.53) | ||
PS (n = 15, 383) | • 0 | 12,388 (81.3%) | 132 (83.0%) | 1.05 (0.87–1.23) | 0.8 |
• 1 | 2836 (18.6%) | 27 (17.0%) | 0.94 (0.59–1.29) | ||
ASA (n = 15,383) | • I | 8876 (58.2%) | 96 (60.3%) | 1.07 (0.86–1.28) | 0.9 |
• II | 5391 (35.4%) | 53 (33.3%) | 0.97(0.71–1.23) | ||
• III | 957 (6.3%) | 10 (6.3%) | 1.03 (0.40–1.67) | ||
Fecal Hb (n = 15,707) | • < 100 μg/g | 10,388 (66.8%) | 79 (48.8%) | 0.75 (0.59–0.92) | < 0.001 |
• 100–200 μg/g | 2935 (18.9%) | 41 (25.3%) | 1.42 (0.99–1.86) | ||
• > 200 μg/g | 2222 (14.3%) | 42 (25.9%) | 1.85 (1.30–2.41) | ||
N.colonoscopies (n = 15,707) | • One | 13,557 (87.2%) | 122 (75.3%) | 0.89 (0.73–1.05) | < 0.001 |
• At least two | 1988 (12.8%) | 40 (24.7%) | 1.97 (1.37–2.58) | ||
Number of polyps (n = 15,707) | 2 (IQR 1–4) | 3 (IQR 1–5) | < 0.001 | ||
Number of adenomas (n = 15,707) | 1 (IQR 0–3) | 2 (IQR 1–4) | < 0.001 | ||
Adenoma size (mm) (n = 15,707) | 5 (IQR 0–12) | 19 (IQR 8–31.3) | < 0.001 | ||
European guidelines classification (n = 15,707) | • No adenoma | 4650 (29.9%) | 4 (2.5%) | 0.08 (0.00–0.17) | < 0.001 |
• Low risk | 3626 (23.3%) | 4 (2.5%) | 0.11 (0.00–0.22) | ||
• Intermediate risk | 4179 (26.9%) | 17 (10.5%) | 0.40 (0.21–0.59) | ||
• High risk | 3090 (19.9%) | 137 (84.6%) | 4.24 (3.55–4.94) | ||
Endoscopist’s ADR (n = 15,459) | • Q1 (≤60%) | 2653 (17.3%) | 42 (26.1%) | 1.56 (1.09–2.03) | 0.02 |
• Q2 (60–65.3%) | 3989 (26.1%) | 40 (24.8%) | 0.99 (0.67–1.30) | ||
• Q3 (65.3–70.8%) | 4181 (27.3%) | 34 (21.1%) | 0.81 (0.54–1.08) | ||
• Q4 (> 70.8%) | 4474 (29.2%) | 45 (28.0%) | 0.99 (0.71–1.28) | ||
Endoscopist’s number of colonoscopies (n = 15,459) | • Q1 (≤57) | 198 (1.3%) | 2 (1.2%) | 1.00 (−0.38–2.38) | 0.03 |
• Q2 (58–278) | 1647 (10.8%) | 18 (11.2%) | 1.08 (0.58–1.58) | ||
• Q3 (279–507) | 5340 (34.9%) | 39 (24.2%) | 0.72 (0.50–0.95) | ||
• Q4 (> 507) | 8113 (53.0%) | 102 (63.4%) | 1.24 (1.00–1.48) | ||
Complexity of hospital (n = 15,707) | • Third level | 7150 (46.0%) | 52 (32.1%) | 0.72 (0.53–0.92) | < 0.001 |
• Second level | 8395 (54.0%) | 110 (67.9%) | 1.29 (1.05–1.53) | ||