@article {9163, title = {Associations of Pulmonary Function with MRI Brain Volumes: A Coordinated Multi-Study Analysis.}, journal = {J Alzheimers Dis}, year = {2022}, month = {2022 Oct 03}, abstract = {

BACKGROUND: Previous studies suggest poor pulmonary function is associated with increased burden of cerebral white matter hyperintensities and brain atrophy among elderly individuals, but the results are inconsistent.

OBJECTIVE: To study the cross-sectional associations of pulmonary function with structural brain variables.

METHODS: Data from six large community-based samples (N = 11,091) were analyzed. Spirometric measurements were standardized with respect to age, sex, height, and ethnicity using reference equations of the Global Lung Function Initiative. Associations of forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), and their ratio FEV1/FVC with brain volume, gray matter volume, hippocampal volume, and volume of white matter hyperintensities were investigated using multivariable linear regressions for each study separately and then combined using random-effect meta-analyses.

RESULTS: FEV1 and FVC were positively associated with brain volume, gray matter volume, and hippocampal volume, and negatively associated with white matter hyperintensities volume after multiple testing correction, with little heterogeneity present between the studies. For instance, an increase of FVC by one unit was associated with 3.5 ml higher brain volume (95\% CI: [2.2, 4.9]). In contrast, results for FEV1/FVC were more heterogeneous across studies, with significant positive associations with brain volume, gray matter volume, and hippocampal volume, but not white matter hyperintensities volume. Associations of brain variables with both FEV1 and FVC were consistently stronger than with FEV1/FVC, specifically with brain volume and white matter hyperintensities volume.

CONCLUSION: In cross-sectional analyses, worse pulmonary function is associated with smaller brain volumes and higher white matter hyperintensities burden.

}, issn = {1875-8908}, doi = {10.3233/JAD-220667}, author = {Frenzel, Stefan and Bis, Josh C and Gudmundsson, Elias F and O{\textquoteright}Donnell, Adrienne and Simino, Jeannette and Yaqub, Amber and Bartz, Traci M and Brusselle, Guy G O and B{\"u}low, Robin and DeCarli, Charles S and Ewert, Ralf and Gharib, Sina A and Ghosh, Saptaparni and Gireud-Goss, Monica and Gottesman, Rebecca F and Ikram, M Arfan and Knopman, David S and Launer, Lenore J and London, Stephanie J and Longstreth, W T and Lopez, Oscar L and Melo van Lent, Debora and O{\textquoteright}Connor, George and Satizabal, Claudia L and Shrestha, Srishti and Sigurdsson, Sigurdur and Stubbe, Beate and Talluri, Rajesh and Vasan, Ramachandran S and Vernooij, Meike W and V{\"o}lzke, Henry and Wiggins, Kerri L and Yu, Bing and Beiser, Alexa S and Gudnason, Vilmundur and Mosley, Thomas and Psaty, Bruce M and Wolters, Frank J and Grabe, Hans J and Seshadri, Sudha} }