Abstract
Purpose
This study aimed to evaluate the associations between dyslipidemia and pulmonary function parameters assessed by spirometry and the forced oscillation technique in asthmatic children.
Methods
Asthmatic children (5–18 years old) had fasting serum lipid profiles including low-density lipoprotein cholesterol (LDL-C), total cholesterol (TC), triglyceride (TG), and high-density lipoprotein cholesterol (HDL-C) concentrations, and C-reactive protein (CRP) measured. Pulmonary function tests were assessed by spirometry and the forced oscillation technique (FOT).
Results
One hundred forty-one asthmatic children were enrolled with a mean (SD) age of 11.82 (3.38) years. Eighty-eight (62.4%) children were boys, 64 (45.4%) had dyslipidemia, and 20 (14.2%) were obese. Among the children with dyslipidemia, a high LDL-C concentration (65.6%) was the most common form of dyslipidemia, followed by high TC (57.8%), high TG (35.9%), and low HDL-C concentrations (15.6%). Multivariable analysis showed significant associations between HDL-C concentrations and respiratory resistance at 5 Hz (R5) and respiratory resistance at 20 Hz (R20), and TC concentrations were modestly associated with reactance at 5 Hz (X5), the frequency of resonance (Fres), and the area of reactance (ALX). Asthmatic children who had high LDL-C concentrations had a significantly higher expiratory phase R5, whole breath R20, and expiratory phase R20 than those in children with normal LDL-C concentrations.
Conclusion
This study suggests an association of blood cholesterol, especially HDL-C and LDL-C, and respiratory resistance measured by the FOT, irrespective of the obesity status. An intervention for improving LDL-C and HDL-C concentrations may be beneficial on lung function parameters in asthmatic children.
Clinical Trial Registration: TCTR20200305005; date of registration: 03-04-2020 (retrospectively registered).
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Data Availability
The data that support the findings of this study are not publicly available because they contain information that could compromise the privacy of research participants but are available from the corresponding author (W.M.) upon reasonable request.
Abbreviations
- FVC:
-
Forced vital capacity
- FEV1 :
-
Forced expiratory volume in 1 second
- FEF25–75 :
-
Forced expiratory flow at 25–75% of FVC
- PACT:
-
Pediatric asthma control test
- PAQLQ:
-
Pediatric Asthma Quality of Life Questionnaire
- CRP:
-
C-reactive protein
- HDL-C:
-
High-density lipoprotein cholesterol
- LDL-C:
-
Low-density lipoprotein cholesterol
- TC:
-
Total cholesterol
- TG:
-
Triglyceride
- FOT:
-
Forced oscillation technique
- R5 :
-
Respiratory resistance at 5 Hz
- R20 :
-
Respiratory resistance at 20 Hz
- X5 :
-
Respiratory reactance at 5 Hz
- ALX:
-
Area of reactance
- Fres:
-
Resonance frequency
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Acknowledgements
We would like to thank Ms Cherapat Sasisakulporn for helping in performing the FOT and spirometry measurement.
Funding
This work was supported by the Faculty of Medicine Ramathibodi Hospital, Mahidol University.
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PNC, WK, and WM designed the study. PNC, WJ, and PK contributed to data collection. PNC, AS, and WM performed the statistical analysis and interpretation of the results. PNC and WM drafted the manuscript. WK and WM edited the final manuscript. All authors read and approved the final manuscript.
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The authors have no conflict of interest to declare.The data that support the findings of this study are not publicly available because they contain information that could compromise the privacy of research participants but are available from the corresponding author (W.M.) upon reasonable request.
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Ethical approval was provided by the Human Rights and Ethics Committee of the Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (ID: MURA2019/55).
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Written informed consent and informed written assent for children aged 7 years or older were obtained for all participants and their parents.
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Chanachon, P.N., Jotikasthira, W., Kiewngam, P. et al. Association of Dyslipidemia and Respiratory Resistance Assessed by the Forced Oscillation Technique in Asthmatic Children. Lung 200, 73–82 (2022). https://doi.org/10.1007/s00408-021-00502-1
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DOI: https://doi.org/10.1007/s00408-021-00502-1