TY - JOUR
T1 - Recalibrating single-study effect sizes using hierarchical Bayesian models
AU - Cao, Zhipeng
AU - McCabe, Matthew
AU - Callas, Peter
AU - Cupertino, Renata B
AU - Ottino-González, Jonatan
AU - Murphy, Alistair
AU - Pancholi, Devarshi
AU - Schwab, Nathan
AU - Catherine, Orr
AU - Hutchison, Kent
AU - Cousijn, Janna
AU - Dagher, Alain
AU - Foxe, John J
AU - Goudriaan, Anna E
AU - Hester, Robert
AU - Li, Chiang-Shan R
AU - Thompson, Wesley K
AU - Morales, Angelica M
AU - London, Edythe D
AU - Lorenzetti, Valentina
AU - Luijten, Maartje
AU - Martin-Santos, Rocio
AU - Momenan, Reza
AU - Paulus, Martin P
AU - Schmaal, Lianne
AU - Sinha, Rajita
AU - Solowij, Nadia
AU - Stein, Dan J
AU - Stein, Elliot A
AU - Uhlmann, Anne
AU - van Holst, Ruth J
AU - Veltman, Dick J
AU - Wiers, Reinout W
AU - Yücel, Murat
AU - Zhang, Sheng
AU - Conrod, Patricia
AU - Mackey, Scott
AU - Garavan, Hugh
AU - ENIGMA Addiction Working Group
N1 - Copyright © 2023 Cao, McCabe, Callas, Cupertino, Ottino-González, Murphy, Pancholi, Schwab, Catherine, Hutchison, Cousijn, Dagher, Foxe, Goudriaan, Hester, Li, Thompson, Morales, London, Lorenzetti, Luijten, Martin-Santos, Momenan, Paulus, Schmaal, Sinha, Solowij, Stein, Stein, Uhlmann, van Holst, Veltman, Wiers, Yücel, Zhang, Conrod, Mackey, Garavan and the ENIGMA Addiction Working Group.
PY - 2023/12/21
Y1 - 2023/12/21
N2 - INTRODUCTION: There are growing concerns about commonly inflated effect sizes in small neuroimaging studies, yet no study has addressed recalibrating effect size estimates for small samples. To tackle this issue, we propose a hierarchical Bayesian model to adjust the magnitude of single-study effect sizes while incorporating a tailored estimation of sampling variance.METHODS: We estimated the effect sizes of case-control differences on brain structural features between individuals who were dependent on alcohol, nicotine, cocaine, methamphetamine, or cannabis and non-dependent participants for 21 individual studies (Total cases: 903; Total controls: 996). Then, the study-specific effect sizes were modeled using a hierarchical Bayesian approach in which the parameters of the study-specific effect size distributions were sampled from a higher-order overarching distribution. The posterior distribution of the overarching and study-specific parameters was approximated using the Gibbs sampling method.RESULTS: The results showed shrinkage of the posterior distribution of the study-specific estimates toward the overarching estimates given the original effect sizes observed in individual studies. Differences between the original effect sizes (i.e., Cohen's d) and the point estimate of the posterior distribution ranged from 0 to 0.97. The magnitude of adjustment was negatively correlated with the sample size (r = -0.27, p < 0.001) and positively correlated with empirically estimated sampling variance (r = 0.40, p < 0.001), suggesting studies with smaller samples and larger sampling variance tended to have greater adjustments. DISCUSSION: Our findings demonstrate the utility of the hierarchical Bayesian model in recalibrating single-study effect sizes using information from similar studies. This suggests that Bayesian utilization of existing knowledge can be an effective alternative approach to improve the effect size estimation in individual studies, particularly for those with smaller samples.
AB - INTRODUCTION: There are growing concerns about commonly inflated effect sizes in small neuroimaging studies, yet no study has addressed recalibrating effect size estimates for small samples. To tackle this issue, we propose a hierarchical Bayesian model to adjust the magnitude of single-study effect sizes while incorporating a tailored estimation of sampling variance.METHODS: We estimated the effect sizes of case-control differences on brain structural features between individuals who were dependent on alcohol, nicotine, cocaine, methamphetamine, or cannabis and non-dependent participants for 21 individual studies (Total cases: 903; Total controls: 996). Then, the study-specific effect sizes were modeled using a hierarchical Bayesian approach in which the parameters of the study-specific effect size distributions were sampled from a higher-order overarching distribution. The posterior distribution of the overarching and study-specific parameters was approximated using the Gibbs sampling method.RESULTS: The results showed shrinkage of the posterior distribution of the study-specific estimates toward the overarching estimates given the original effect sizes observed in individual studies. Differences between the original effect sizes (i.e., Cohen's d) and the point estimate of the posterior distribution ranged from 0 to 0.97. The magnitude of adjustment was negatively correlated with the sample size (r = -0.27, p < 0.001) and positively correlated with empirically estimated sampling variance (r = 0.40, p < 0.001), suggesting studies with smaller samples and larger sampling variance tended to have greater adjustments. DISCUSSION: Our findings demonstrate the utility of the hierarchical Bayesian model in recalibrating single-study effect sizes using information from similar studies. This suggests that Bayesian utilization of existing knowledge can be an effective alternative approach to improve the effect size estimation in individual studies, particularly for those with smaller samples.
UR - https://www.scopus.com/pages/publications/105005980914
U2 - 10.3389/fnimg.2023.1138193
DO - 10.3389/fnimg.2023.1138193
M3 - Article
C2 - 38179200
SN - 2813-1193
VL - 2
JO - Frontiers in Neuroimaging
JF - Frontiers in Neuroimaging
M1 - 1138193
ER -