Objective: To compare the postoperative pain trajectories between transabdominal preperitoneal prosthetic repair(TAPP) and Lichtenstein repair, analyze factors associated with chronic postoperative inguinal pain(CPIP), and develop and validate a risk prediction model. Methods: A total of 340 patients who underwent inguinal hernia repair in Nanjing Central Hospital from August 2021 to December 2024 were enrolled in this study, including 185 cases in the TAPP group and 155 cases in the Lichtenstein group. Univariate and multivariate Logistic regression analyses were used to screen for factors influencing chronic pain. A risk prediction model was constructed based on these factors and validated using the Hosmer-Lemeshow(H-L) test and receiver operating characteristic(ROC) curve analysis. Pain trajectories between the two groups were compared using dynamic Visual Analogue Scale(VAS) scores, and risk stratification was calculated based on the model. Results: The incidence of CPIP at 3 months postoperatively was 8.2%(28/340). VAS scores in the TAPP group were significantly lower than those in the Lichtenstein group at both 24 hours[(4.5±1.2) scores vs. (5.2±1.5) scores] and 7 days[(2.8±0.9)scores vs. (3.2±1.0)scores] postoperatively(all P<0.001). Multivariate analysis revealed that factors significantly associated with CPIP included: age <55 years(OR=2.981,95%CI 1.376-6.458), BMI ≥28 kg·m-2(OR=2.670,95%CI 1.180-6.041), Lichtenstein repair(OR=2.450,95%CI 1.137-5.279), preoperative hernia-related pain history(OR=2.319,95%CI 1.043-5.155), and postoperative acute pain(VAS≥4)(OR=2.223,95%CI 1.013-4.879)(all P<0.05). The prediction model constructed based on these factors demonstrated good discriminatory ability(AUC=0.791, 95%CI 0.690-0.869). Risk stratification showed that the number of associated factors carried was positively correlated with the predicted risk(corresponding risks for 0 to 5 factors: 2%, 3%, 9%, 20%, 38%, and 60%, respectively). Conclusion: Lichtenstein repair, age <55 years, BMI ≥28 kg·m-2, preoperative pain history, and postoperative acute pain are significantly associated with CPIP. The model developed based on these factors can effectively quantify individual risk and identify high-risk patients, providing a basis for individualized perioperative pain management. |
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