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Association of methacholine challenge test with diagnosis of chronic lung allograft dysfunction in lung transplant patients.
Clinical Transplantation 2018 October
BACKGROUND: Chronic lung allograft dysfunction (CLAD) is a complication of lung transplantation. We sought to determine whether bronchial hyperresponsiveness detected by the methacholine challenge test (MCT) at 3 months after lung transplant (LT) predicts the development of CLAD.
METHODS: We performed a retrospective cohort study of 140 LT patients between 1/2008 and 6/2014 who underwent MCT at 3 months after LT. Pearson's chi-squared test and Kruskal-Wallis test were used to compare categorical and continuous variables, respectively. Cox proportional hazards modeling was used to evaluate the association between CLAD and MCT.
RESULTS: Methacholine challenge test+ was associated with the development of overall CLAD (adjusted hazards ratio [aHR]: 3.47; 95% confidence interval [95% CI]: 1.71, 7.03; P = 0.001) and CLAD within 3 years (aHR: 4.98; 95%CI: 1.84, 13.48; P = 0.002). Subgroup analysis showed that MCT (+) is associated with overall CLAD in single lung transplant (SLT) (aHR: 8.18; 95% CI: 2.22, 30.09; P = 0.002), double lung transplant (DLT) (aHR: 3.27; 95% CI: 1.22, 8.78; P = 0.02) and CLAD within 3 years in DLT patients (aHR: 6.76; 95% CI: 1.71, 26.74; P = 0.01).
CONCLUSION: Methacholine challenge test+ at 3 months after LT is associated with the development of overall CLAD. Positive MCT could predict the development of early CLAD within 3 years in DLT patients.
METHODS: We performed a retrospective cohort study of 140 LT patients between 1/2008 and 6/2014 who underwent MCT at 3 months after LT. Pearson's chi-squared test and Kruskal-Wallis test were used to compare categorical and continuous variables, respectively. Cox proportional hazards modeling was used to evaluate the association between CLAD and MCT.
RESULTS: Methacholine challenge test+ was associated with the development of overall CLAD (adjusted hazards ratio [aHR]: 3.47; 95% confidence interval [95% CI]: 1.71, 7.03; P = 0.001) and CLAD within 3 years (aHR: 4.98; 95%CI: 1.84, 13.48; P = 0.002). Subgroup analysis showed that MCT (+) is associated with overall CLAD in single lung transplant (SLT) (aHR: 8.18; 95% CI: 2.22, 30.09; P = 0.002), double lung transplant (DLT) (aHR: 3.27; 95% CI: 1.22, 8.78; P = 0.02) and CLAD within 3 years in DLT patients (aHR: 6.76; 95% CI: 1.71, 26.74; P = 0.01).
CONCLUSION: Methacholine challenge test+ at 3 months after LT is associated with the development of overall CLAD. Positive MCT could predict the development of early CLAD within 3 years in DLT patients.
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