a trend toward significanceP=0.033
In the final multivariate model for ACN ( Table 2 ), independent predictors were identified as follows: age ≥60 years (OR=3.46, 95% CI 1.30–9.21), current smoking, which demonstrated a trend toward significance (OR=1.95, 95% CI 0.92–4.11), and a family history of CRC in first-degree relatives (OR=4.43, 95% CI 1.43–17.32, P=0.033).