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Impact of Donor Arterial Partial Pressure of Oxygen on Outcomes After Lung Transplantation in Adult Cystic Fibrosis Recipients

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Abstract

Introduction

Donor PaO2 levels are used for assessing organs for lung transplantation (LTx), but survival implications of PaO2 levels in adult cystic fibrosis (CF) patients receiving LTx are unclear.

Methods

UNOS registry data spanning 2005–2013 were used to test for associations of donor PaO2 with patient survival and bronchiolitis obliterans syndrome (BOS) in adult (age ≥ 18 years) first-time LTx recipients diagnosed with CF.

Results

The analysis included 1587 patients, of whom 1420 had complete data for multivariable Cox models. No statistically significant differences among donor PaO2 categories of ≤200, 201–300, 301–400, or >400 mmHg were found in univariate survival analysis (log-rank test p = 0.290). BOS onset did not significantly differ across donor PaO2 categories (Chi-square p = 0.480). Multivariable Cox models of patient survival supported the lack of difference across donor PaO2 categories. Interaction analysis found a modest difference in survival between the two top categories of donor PaO2 when examining patients with body mass index (BMI) in the lowest decile (≤16.5 kg/m2).

Conclusions

Donor PaO2 was not associated with survival or BOS onset in adult CF patients undergoing LTx. Notwithstanding statistically significant interactions between donor PaO2 and BMI, there was no evidence of post-LTx survival risk associated with donor PaO2 below conventional thresholds in any subgroup of adults with CF.

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Author Contributions

Don Hayes, Jr.: Conception and design, acquisition of data, interpretation of data, drafted the manuscript; Benjamin T. Kopp, Stephen E. Kirkby, Susan D. Reynolds, Heidi M. Mansour, Joseph D. Tobias: Interpretation of data, revision of the manuscript; Dmitry Tumin: Conception and design, interpretation of data, statistical analysis, revision of the manuscript.

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Correspondence to Don Hayes Jr..

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Hayes, D., Kopp, B.T., Kirkby, S.E. et al. Impact of Donor Arterial Partial Pressure of Oxygen on Outcomes After Lung Transplantation in Adult Cystic Fibrosis Recipients. Lung 194, 547–553 (2016). https://doi.org/10.1007/s00408-016-9902-3

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  • DOI: https://doi.org/10.1007/s00408-016-9902-3

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