Sehoon Park1,2, Soojin Lee3,4, Yaerim Kim5, Yeonhee Lee3,4, Min Woo Kang3,4, Kwangsoo Kim6, Yong Chul Kim3, Seung Seok Han3,7, Hajeong Lee3, Jung Pyo Lee3,7,8, Kwon Wook Joo3,4,7, Chun Soo Lim3,7,8, Yon Su Kim1,3,4,7, Dong Ki Kim9,4,7. 1. Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea. 2. Department of Internal Medicine, Armed Forces Capital Hospital, Seongnam, Gyeonggi-do, Korea. 3. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea. 4. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea. 5. Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea. 6. Transdisciplinary Department of Medicine and Advanced Technology, Seoul National University Hospital, Seoul, Korea. 7. Kidney Research Institute, Seoul National University, Seoul, Korea. 8. Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, Korea. 9. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea dkkim73@gmail.com.
Abstract
BACKGROUND: Further investigation of the causal effects of psychologic wellbeing on kidney function is warranted. METHODS: In this Mendelian randomization (MR) study, genetic instruments for positive affect, life satisfaction, depressive symptoms, and neuroticism were introduced from a previous genome-wide association study meta-analysis of European individuals. Summary-level MR was performed using the CKDGen data of European ancestry (n=567,460), and additional allele score-based MR was performed in the individual-level data of White British UK Biobank participants (n=321,024). RESULTS: In summary-level MR with the CKDGen data, depressive symptoms were a significant causative factor for kidney function impairment (CKD OR, 1.45; 95% confidence interval, 1.07 to 1.96; eGFR change [%] beta -2.18; 95% confidence interval, -3.61 to -0.72) and pleiotropy-robust sensitivity analysis results supported the causal estimates. A genetic predisposition for positive affect was significantly associated with better kidney function (CKD OR, 0.69; 95% confidence interval, 0.52 to 0.91), eGFR change [%] beta 1.50; 95% confidence interval, 0.09 to 2.93) and sensitivity MR analysis results supported the finding for CKD outcome, but was nonsignificant for eGFR. Life satisfaction and neuroticism exposures showed nonsignificant causal estimates. In the UK Biobank with covariate-adjusted allele score MR analysis, allele scores for positive affect and life satisfaction were causally associated with reduced risk of CKD and higher eGFR. In contrast, neuroticism allele score was associated with increased risk of CKD and lower eGFR, and depressive symptoms allele score was associated with lower eGFR, but showed nonsignificant association with CKD. CONCLUSIONS: Health care providers in the nephrology field should be aware of the causal linkage between psychologic wellbeing and kidney function.
BACKGROUND: Further investigation of the causal effects of psychologic wellbeing on kidney function is warranted. METHODS: In this Mendelian randomization (MR) study, genetic instruments for positive affect, life satisfaction, depressive symptoms, and neuroticism were introduced from a previous genome-wide association study meta-analysis of European individuals. Summary-level MR was performed using the CKDGen data of European ancestry (n=567,460), and additional allele score-based MR was performed in the individual-level data of White British UK Biobank participants (n=321,024). RESULTS: In summary-level MR with the CKDGen data, depressive symptoms were a significant causative factor for kidney function impairment (CKD OR, 1.45; 95% confidence interval, 1.07 to 1.96; eGFR change [%] beta -2.18; 95% confidence interval, -3.61 to -0.72) and pleiotropy-robust sensitivity analysis results supported the causal estimates. A genetic predisposition for positive affect was significantly associated with better kidney function (CKD OR, 0.69; 95% confidence interval, 0.52 to 0.91), eGFR change [%] beta 1.50; 95% confidence interval, 0.09 to 2.93) and sensitivity MR analysis results supported the finding for CKD outcome, but was nonsignificant for eGFR. Life satisfaction and neuroticism exposures showed nonsignificant causal estimates. In the UK Biobank with covariate-adjusted allele score MR analysis, allele scores for positive affect and life satisfaction were causally associated with reduced risk of CKD and higher eGFR. In contrast, neuroticism allele score was associated with increased risk of CKD and lower eGFR, and depressive symptoms allele score was associated with lower eGFR, but showed nonsignificant association with CKD. CONCLUSIONS: Health care providers in the nephrology field should be aware of the causal linkage between psychologic wellbeing and kidney function.
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