0000000000682938
AUTHOR
James Davis
A linear regression-based machine learning pipeline for the discovery of clinically relevant correlates of gait speed reserve from multiple physiological systems
Frailty in older adults is characterized by reduced physiological reserve. Gait speed reserve (GSR: maximum minus usual gait speed) could help identify frailty and act as a proxy for physiological reserve. Utilizing data from 2397 participants aged 50+ from wave 3 of The Irish Longitudinal Study on Ageing, we developed a stepwise linear regression-based machine learning pipeline to select the most important GSR predictors from 34 manually selected features across multiple domains. Variables were selected one at a time such that they maximized the mean adjusted r-squared score from a 5-fold cross-validation. A peak score of (0.16 +/- 0.03) was achieved with 14 variables (giving adjusted-r-sq…
Prestroke Weight Loss Is Associated With Poststroke Mortality Among Men in the Honolulu-Asia Aging Study
Objective To examine baseline prestroke weight loss and poststroke mortality among men. Design Longitudinal study of late-life prestroke body mass index (BMI), weight loss, and BMI change (midlife to late life) with up to 8-year incident stroke and mortality follow-up. Setting Community-based aging study data. Participants Japanese-American men (N=3581; age range, 71–93y) who were stroke free at baseline. Interventions Not applicable. Main Outcome Measure Poststroke mortality: 30 days poststroke, analyzed with stepwise multivariable logistic regression; and long-term poststroke (up to 8y), analyzed with stepwise multivariable Cox regression. Results Weight loss (4.5kg decrements) was associ…
Prestroke Weight Loss Is Associated With Poststroke Mortality Among Men in the Honolulu-Asia Aging Study
Abstract Objective To examine baseline prestroke weight loss and poststroke mortality among men. Design Longitudinal study of late-life prestroke body mass index (BMI), weight loss, and BMI change (midlife to late life) with up to 8-year incident stroke and mortality follow-up. Setting Community-based aging study data. Participants Japanese-American men (N=3581; age range, 71–93y) who were stroke free at baseline. Interventions Not applicable. Main Outcome Measure Poststroke mortality: 30 days poststroke, analyzed with stepwise multivariable logistic regression; and long-term poststroke (up to 8y), analyzed with stepwise multivariable Cox regression. Results Weight loss (4.5kg decrements) w…