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Gamma-Glutamyltransferase and Future Risk of Pneumonia: A Long-Term Prospective Cohort Study

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Abstract

Serum gamma-glutamyltransferase (GGT) has been linked with the risk of adverse health outcomes. We aimed to assess the prospective association of GGT activity with pneumonia risk. Serum GGT was measured at baseline in 2400 middle-aged men. Within-person variability in GGT values was corrected for using data from repeat measurements. During a median follow-up of 25.3 years, 409 pneumonia cases were recorded. The age-adjusted regression dilution ratio of GGT was 0.68 (95% CI 0.63–0.73). Gamma-glutamyltransferase was approximately log-linearly associated with pneumonia risk. In analysis adjusted for several major pneumonia risk factors, the hazard ratio (95% CI) for pneumonia per 1 standard deviation increase in GGT was 1.14 (1.02–1.28). The association was however attenuated on additional adjustment for high-sensitivity C-reactive protein (hsCRP) 1.08 (0.96–1.22). There is an approximately log-linear positive association between GGT activity and future risk of pneumonia in a middle-aged male population, which is partly dependent on hsCRP.

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Fig. 1

Abbreviations

CI:

Confidence interval

COPD:

Chronic obstructive pulmonary disease

GGT:

Gamma-glutamyltransferase

HR:

Hazard ratio

hsCRP:

High-sensitivity C-reactive protein

IQR:

Interquartile range

KIHD:

Kuopio Ischemic Heart Disease

SD:

Standard deviation

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Acknowledgements

We thank the staff of the Kuopio Research Institute of Exercise Medicine and the Research Institute of Public Health and University of Eastern Finland, Kuopio, Finland for the data collection in the study.

Funding

This study was funded by The Finnish Foundation for Cardiovascular Research, Helsinki, Finland.

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Correspondence to Setor K. Kunutsor.

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The authors declare that they have no competing interest.

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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.

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

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Kunutsor, S.K., Laukkanen, J.A. Gamma-Glutamyltransferase and Future Risk of Pneumonia: A Long-Term Prospective Cohort Study. Lung 195, 799–803 (2017). https://doi.org/10.1007/s00408-017-0059-5

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  • DOI: https://doi.org/10.1007/s00408-017-0059-5

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