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Chusyd DE, Austad SN, Brown AW, Chen X, Dickinson SL, Ejima K, Fluharty D, Golzarri-Arroyo L, Holden R, Jamshidi-Naeini Y, Landsittel D, Lartey S, Mannix E, Vorland CJ, Allison DB. From Model Organisms to Humans, the Opportunity for More Rigor in Methodologic and Statistical Analysis, Design, and Interpretation of Aging and Senescence Research. J Gerontol A Biol Sci Med Sci 2021; 77:2155-2164. [PMID: 34950945 PMCID: PMC9678201 DOI: 10.1093/gerona/glab382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Indexed: 12/26/2022] Open
Abstract
This review identifies frequent design and analysis errors in aging and senescence research and discusses best practices in study design, statistical methods, analyses, and interpretation. Recommendations are offered for how to avoid these problems. The following issues are addressed: (a) errors in randomization, (b) errors related to testing within-group instead of between-group differences, (c) failing to account for clustering, (d) failing to consider interference effects, (e) standardizing metrics of effect size, (f) maximum life-span testing, (g) testing for effects beyond the mean, (h) tests for power and sample size, (i) compression of morbidity versus survival curve squaring, and (j) other hot topics, including modeling high-dimensional data and complex relationships and assessing model assumptions and biases. We hope that bringing increased awareness of these topics to the scientific community will emphasize the importance of employing sound statistical practices in all aspects of aging and senescence research.
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Affiliation(s)
- Daniella E Chusyd
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Steven N Austad
- Department of Biology, University of Alabama at Birmingham, Birmingham, Alabama, USA,Nathan Shock Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Andrew W Brown
- Department of Applied Health Science, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Xiwei Chen
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Stephanie L Dickinson
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Keisuke Ejima
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - David Fluharty
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA,Departments of Mathematics and Economics, Ivy Tech Community College, Columbus, Indiana, USA
| | - Lilian Golzarri-Arroyo
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Richard Holden
- Department of Health and Wellness Design, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Yasaman Jamshidi-Naeini
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Doug Landsittel
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Stella Lartey
- Department of Epidemiology and Biostatistics, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Edward Mannix
- Department of Anatomy, Cell Biology, and Physiology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Colby J Vorland
- Department of Applied Health Science, Indiana University Bloomington, Bloomington, Indiana, USA
| | - David B Allison
- Address correspondence to: David B. Allison, PhD, Department of Epidemiology and Biostatistics, Indiana University Bloomington, 1025 E. 7th St., PH 111, Bloomington, IN 47405, USA. E-mail:
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University of Alabama at Birmingham Nathan Shock Center: comparative energetics of aging. GeroScience 2021; 43:2149-2160. [PMID: 34304389 DOI: 10.1007/s11357-021-00414-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 06/29/2021] [Indexed: 12/09/2022] Open
Abstract
The UAB Nathan Shock Center focuses on comparative energetics and aging. Energetics, as defined for this purpose, encompasses the causes, mechanisms, and consequences of the acquisition, storage, and use of metabolizable energy. Comparative energetics is the study of metabolic processes at multiple scales and across multiple species as it relates to health and aging. The link between energetics and aging is increasingly understood in terms of dysregulated mitochondrial function, altered metabolic signaling, and aberrant nutrient responsiveness with increasing age. The center offers world-class expertise in comprehensive, integrated energetic assessment and analysis from the level of the organelle to the organism and across species from the size of worms to rats as well as state-of-the-art data analytics. The range of services offered by our three research cores, (1) The Organismal Energetics Core, (2) Mitometabolism Core, and (3) Data Analytics Core, is described herein.
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Ahmadabadi MN, Nili Ahmadabadi M. Gaussian quadrature method for GLD parameter estimation. COMMUN STAT-SIMUL C 2021. [DOI: 10.1080/03610918.2021.1888999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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