Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-Analysis
This study aimed to evaluate the efficacy of omega-3 fatty acid supplementation interventions in improving depression in patients with dementia. To achieve this objective, randomized controlled trials (RCTs) were identified from primary electronic databases, focusing on the relationship between omeg...
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MDPI AG
2024-02-01
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| Series: | Healthcare |
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| Online Access: | https://www.mdpi.com/2227-9032/12/5/536 |
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| author | Yen-Yun Chang Berne Ting Daniel Tzu-Li Chen Wei-Ti Hsu Song-Chow Lin Chun-Yen Kuo Ming-Fu Wang |
| author_facet | Yen-Yun Chang Berne Ting Daniel Tzu-Li Chen Wei-Ti Hsu Song-Chow Lin Chun-Yen Kuo Ming-Fu Wang |
| author_sort | Yen-Yun Chang |
| collection | DOAJ |
| description | This study aimed to evaluate the efficacy of omega-3 fatty acid supplementation interventions in improving depression in patients with dementia. To achieve this objective, randomized controlled trials (RCTs) were identified from primary electronic databases, focusing on the relationship between omega-3 fatty acids and depression in patients with dementia. The primary outcome was the impact of omega-3 fatty acids on post-intervention depression in patients with dementia, with subgroup analyses conducted based on the type of intervention (docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) combination), duration of intervention (3 months, 6 months, 12 months, ≥24 months), cognitive function (ranging from mild cognitive impairment (MCI) to severe dementia), and daily dosage (high, medium, low, applicable to both DHA and EPA). The study has been duly registered with PROSPERO (registration ID: CRD42023408744). A meta-analysis of five studies (n = 517) included in nine systematic reviews showed that omega-3 supplementation had a non-significant trend toward affecting depressive symptoms in patients with dementia (standardized mean difference (SMD): 0.147; 95% confidence interval (CI): −0.324 to 0.049; <i>p</i> = 0.141). Subgroup analyses revealed that DHA supplementation significantly reduced depressive symptoms (SMD: −0.247; <i>p</i> = 0.039). There was no significant effect for high (SMD: −0.169; 95% CI: −0.454 to 0.116; <i>p</i> = 0.246) or medium (SMD: −0.061; 95% CI: −0.228 to 0.105; <i>p</i> = 0.470) doses of EPA. However, low doses of EPA were significantly effective (SMD: −0.953; 95% CI: −1.534 to −0.373; <i>p</i> = 0.001), with notable improvements in patients with MCI (SMD: −0.934; <i>p</i> < 0.001). The study concludes that omega-3 fatty acids, particularly through DHA supplementation, may alleviate depressive symptoms in patients with MCI. Given the limited sample size, further long-term RCTs are recommended to better understand the efficacy and optimal management of omega-3 supplementation in this population using different dosages. |
| first_indexed | 2024-04-25T00:30:03Z |
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| last_indexed | 2024-04-25T00:30:03Z |
| publishDate | 2024-02-01 |
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| spelling | doaj.art-5c7f2440b8fd435392448cddce9f54b32024-03-12T16:44:43ZengMDPI AGHealthcare2227-90322024-02-0112553610.3390/healthcare12050536Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-AnalysisYen-Yun Chang0Berne Ting1Daniel Tzu-Li Chen2Wei-Ti Hsu3Song-Chow Lin4Chun-Yen Kuo5Ming-Fu Wang6Department of Food and Nutrition, Providence University, Taichung 433719, TaiwanPh.D. Program for Aging, College of Medicine, China Medical University, Taichung 404333, TaiwanDepartment of Psychiatry and Mind-Body Interface Laboratory (MBI-Lab), China Medical University Hospital, Taichung 404327, TaiwanGraduate Institute of Biomedicine, College of Medicine, China Medical University, Taichung 404327, TaiwanDepartment of Medicine, Taipei Medical University, Taipei 11031, TaiwanPh.D. Program in Health and Social Welfare for Indigenous Peoples, Providence University, Taichung 433719, TaiwanDepartment of Food and Nutrition, Providence University, Taichung 433719, TaiwanThis study aimed to evaluate the efficacy of omega-3 fatty acid supplementation interventions in improving depression in patients with dementia. To achieve this objective, randomized controlled trials (RCTs) were identified from primary electronic databases, focusing on the relationship between omega-3 fatty acids and depression in patients with dementia. The primary outcome was the impact of omega-3 fatty acids on post-intervention depression in patients with dementia, with subgroup analyses conducted based on the type of intervention (docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) combination), duration of intervention (3 months, 6 months, 12 months, ≥24 months), cognitive function (ranging from mild cognitive impairment (MCI) to severe dementia), and daily dosage (high, medium, low, applicable to both DHA and EPA). The study has been duly registered with PROSPERO (registration ID: CRD42023408744). A meta-analysis of five studies (n = 517) included in nine systematic reviews showed that omega-3 supplementation had a non-significant trend toward affecting depressive symptoms in patients with dementia (standardized mean difference (SMD): 0.147; 95% confidence interval (CI): −0.324 to 0.049; <i>p</i> = 0.141). Subgroup analyses revealed that DHA supplementation significantly reduced depressive symptoms (SMD: −0.247; <i>p</i> = 0.039). There was no significant effect for high (SMD: −0.169; 95% CI: −0.454 to 0.116; <i>p</i> = 0.246) or medium (SMD: −0.061; 95% CI: −0.228 to 0.105; <i>p</i> = 0.470) doses of EPA. However, low doses of EPA were significantly effective (SMD: −0.953; 95% CI: −1.534 to −0.373; <i>p</i> = 0.001), with notable improvements in patients with MCI (SMD: −0.934; <i>p</i> < 0.001). The study concludes that omega-3 fatty acids, particularly through DHA supplementation, may alleviate depressive symptoms in patients with MCI. Given the limited sample size, further long-term RCTs are recommended to better understand the efficacy and optimal management of omega-3 supplementation in this population using different dosages.https://www.mdpi.com/2227-9032/12/5/536elderlydementiadepressionfish oilomega-3 fatty aciddocosahexaenoic acid |
| spellingShingle | Yen-Yun Chang Berne Ting Daniel Tzu-Li Chen Wei-Ti Hsu Song-Chow Lin Chun-Yen Kuo Ming-Fu Wang Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-Analysis Healthcare elderly dementia depression fish oil omega-3 fatty acid docosahexaenoic acid |
| title | Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-Analysis |
| title_full | Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-Analysis |
| title_fullStr | Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-Analysis |
| title_full_unstemmed | Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-Analysis |
| title_short | Omega-3 Fatty Acids for Depression in the Elderly and Patients with Dementia: A Systematic Review and Meta-Analysis |
| title_sort | omega 3 fatty acids for depression in the elderly and patients with dementia a systematic review and meta analysis |
| topic | elderly dementia depression fish oil omega-3 fatty acid docosahexaenoic acid |
| url | https://www.mdpi.com/2227-9032/12/5/536 |
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