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Exercise performance and quality of life in children with cystic fibrosis and mildly impaired lung function: relation with antibiotic treatments and hospitalization

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Abstract

This study evaluates the impact of antibiotic treatments and hospitalization on exercise performance and health-related quality of life (QOL) in children with mild cystic fibrosis (CF) lung disease. Forty-seven children between 7 and 17 years with mild CF underwent a maximal exercise test including spiro-ergometry and filled out a QOL-questionnaire (PedsQL™). Amount of antibiotic treatments (AB) and hospitalization days in the last 3 years were reviewed. FEV1% was mildly decreased (91.7 ± 17.9 L/min, p = 0.02). Maximal oxygen consumption (VO2max), test duration and anaerobic threshold were lower compared to a control population (VO2max% 94 ± 15 vs 103 ± 13, p = 0.009). FEV1% correlated with AB and hospitalization episodes in the last year and 3 years before testing, VO2max% only correlated with AB in the last 3 years. Domains of school functioning and emotional functioning were low. Children with higher VO2max% and less AB in the last 3 years had better physical health. Physical health and school functioning were negatively correlated with hospitalization days in the last year.

Conclusion: Patients with mild CF lung disease have good exercise performance although still lower than the normal population. VO2max% is affected by number of antibiotic treatments over a longer period. There is an impact of hospitalization days on quality of life.

What is Known:

Children with CF have lower exercise performance; there is an association between hospitalization frequency and exercise performance

Quality of life is diminished in children with CF and influenced by respiratory infections

What is New:

Even patients with mild CF lung disease have lower maximal exercise performance (VO 2 max) and a lower anaerobic threshold; VO 2 max is lower in children who had more antibiotic treatments in the last 3 years

School and emotional functioning are diminished in children with mild CF lung disease; hospitalization is negatively correlated with school functioning and physical functioning

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Abbreviations

AB:

Amount of antibiotic treatments

BPM:

Beats per minute

BR:

Breathing reserve, (MVV-VE)/MVV

CF:

Cystic fibrosis

CPET:

Cardiopulmonary exercise test

FEV1%:

Forced expiratory volume in 1 s, expressed as percentage of predicted value

HR-QOL:

Health-related quality of life

load%:

Percentage of the predicted load reached by the patient

MVV:

Maximal voluntary ventilation

QOL:

Quality of life

RER:

Respiratory exchange ratio: VCO2/VO2

VAT:

Ventilatory anaerobic threshold

VAT%:

Ventilatory anaerobic threshold, expressed as % of maximal oxygen consumption

VE:

Maximum exercise ventilation

VO2max:

Maximal oxygen consumption

VO2max%:

Percentage of the predicted maximal oxygen consumption reached by the patient

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Acknowledgements

The authors would like to thank the CF centre Ghent University Hospital and Mrs. Ann Raman, Mrs. Marleen Vanderkerken and Mrs. Ann Carton for their support.

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Authors and Affiliations

Authors

Contributions

K.V. participated in the research design, performance of the research, data analysis and writing of the article. J.B., J.C., M.K. and S.V. participated in the data analysis, performance of the research and writing of the article. I.C. and F.P. participated in the performance of the research and data analysis. J.B. participated in the data analysis and writing of the article. F.H., F.D., P.S. and D.D. participated in the writing of the article.

Corresponding author

Correspondence to Kristof Vandekerckhove.

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The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

Additional information

Communicated by Peter de Winter

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Vandekerckhove, K., Keyzer, M., Cornette, J. et al. Exercise performance and quality of life in children with cystic fibrosis and mildly impaired lung function: relation with antibiotic treatments and hospitalization. Eur J Pediatr 176, 1689–1696 (2017). https://doi.org/10.1007/s00431-017-3024-7

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  • DOI: https://doi.org/10.1007/s00431-017-3024-7

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