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Risk factors for portopulmonary hypertension in patients with cirrhosis: a prospective, multicenter study

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Abstract

Background

Tricuspid regurgitation pressure gradient (TRPG) measurement by echocardiography is recommended as the most objective examination to detect portopulmonary hypertension (PoPH). This study aimed to identify factors associated with a high TRPG in patients with cirrhosis and develop a scoring model for identifying patients who are most likely to benefit from echocardiography investigations.

Results

A total of 486 patients who underwent echocardiography were randomly allocated to the derivation and validation sets at a ratio of 2:1. Of the patients, 51 (10.5%) had TRPG ≥ 35 mmHg. The median brain natriuretic peptide (BNP) was 39.5 pg/mL. Shortness of breath (SOB) was reported by 91 (18.7%) patients. In the derivation set, multivariate analysis identified female gender, shortness of breath, and BNP ≥ 48.9 pg/mL as independent factors for TRPG ≥ 35 mmHg. The risk score for predicting TRPG ≥ 35 mmHg was calculated as follows: − 3.596 + 1.250 × gender (female: 1, male: 0) + 1.093 × SOB (presence: 1, absence: 0) + 0.953 × BNP (≥ 48.9 pg/mL: 1, < 48.9 pg/mL: 0). The risk score yielded sensitivity of 66.7%, specificity of 75.3%, positive predictive value of 25.5%, negative predict value of 94.3%, and predictive accuracy of 74.4% for predicting TRPG ≥ 35 mmHg. These results were almost similar in the validation set, indicating the reproducibility and validity of the risk score.

Conclusions

This study clarified the characteristics of patients with suspected PoPH and developed a scoring model for identifying patients at high risk of PoPH, which may be used in selecting patients that may benefit from echocardiography.

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Data availability

The datasets analyzed during the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

Authors

Contributions

All authors provided critical revisions to the study manuscript, and approved the final version submitted for publication. MA, K-SK, TI, HT, KT, TW, KM, CO, AH, HO, MT, HU, AN, MC, KK, SM, JT, AM, KK, YF, TO, TK, TA, NK, NK, TI, MN, RS, MI, YT and MH collected data. MA, TT, MH and KI contributed to the study design. MA and CK analyzed the data. MA and AT contributed to the interpretation of the results and the drafting of the manuscript.

Corresponding author

Correspondence to Masanori Atsukawa.

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Ethical approval

The present study was conducted following the ethical guidelines established in the 2013 Helsinki Declaration and was approved by the ethics committee of Nippon Medical School (approval no. B-2019-098).

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The authors declare no conflicts of interest associated with this manuscript.

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Atsukawa, M., Tsubota, A., Kondo, C. et al. Risk factors for portopulmonary hypertension in patients with cirrhosis: a prospective, multicenter study. Hepatol Int 17, 139–149 (2023). https://doi.org/10.1007/s12072-022-10456-y

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  • DOI: https://doi.org/10.1007/s12072-022-10456-y

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