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Clinical risk factors and blood protein biomarkers of 10-year pneumonia risk.
Abstract
Chronic inflammation may increase susceptibility to pneumonia. To explore associations between clinical comorbidities, serum protein immunoassays, and long-term pneumonia risk. Framingham Heart Study Offspring Cohort participants ≥65 years were linked to their Centers for Medicare Services claims data. Clinical data and 88 serum protein immunoassays were evaluated for associations with 10-year incident pneumonia risk using Fine-Gray models for competing risks of death and least absolute shrinkage and selection operators for covariate selection. We identified 1,370 participants with immunoassays and linkage to Medicare data. During 10 years of follow up, 428 (31%) participants had a pneumonia diagnosis. Chronic pulmonary disease [subdistribution hazard ratio (SHR) 1.87; 95% confidence interval (CI), 1.33-2.61], current smoking (SHR 1.79, CI 1.31-2.45), heart failure (SHR 1.74, CI 1.10-2.74), atrial fibrillation/flutter (SHR 1.43, CI 1.06-1.93), diabetes (SHR 1.36, CI 1.05-1.75) , hospitalization within one year (SHR 1.34, CI 1.09-1.65), and age (SHR 1.06 per year, CI 1.04-1.08) were associated with pneumonia. Three baseline serum protein measurements were associated with pneumonia risk independent of measured clinical factors: growth differentiation factor 15 (SHR 1.32; CI 1.02-1.69), C-reactive protein (SHR 1.16, CI 1.06-1.27) and matrix metallopeptidase 8 (SHR 1.14, CI 1.01-1.30). Addition of C-reactive protein to the clinical model improved prediction (Akaike information criterion 4950 from 4960; C-statistic of 0.64 from 0.62). Clinical comorbidities and serum immunoassays were predictive of pneumonia risk. C-reactive protein, a routinely-available measure of inflammation, modestly improved pneumonia risk prediction over clinical factors. Our findings support the hypothesis that prior inflammation may increase the risk of pneumonia. Here, we show that long-term pneumonia risks are associated with clinical characteristics and serum markers of inflammatio n. Our findings offer preliminary support to the hypothesis that chronic inflammation may be a marker of increased pneumonia risk.
Authors (6) : Ming-Ming Lee, Yi Zuo, Katrina Steiling, Joseph P Mizgerd, Bindu Kalesan, Allan J Walkey
Source : medRxiv : the preprint server for health sciences
Article Information
| Year | 2023 |
| Type | Preprint |
| DOI | 10.1101/2023.12.07.23299678 |
| ISSN | |
| Volume |
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