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ORIGINAL RESEARCH COMMUNICATION |
1 From the Department of Child and Adolescent Psychiatry, Haukeland University Hospital, Bergen, Norway (IB); the Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway (IB, GST, SEV, and SK); Section for Pharmacology, Institute of Medicine, University of Bergen, Bergen, Norway (PMU); and the Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway (PMU).
2 Supported by the Foundation to Promote Research into Functional Vitamin B-12 Deficiency. 3 Address correspondence to I Bjelland, Department of Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, N-5018 Bergen, Norway. E-mail: ingvar.bjelland{at}helse-bergen.no.
Background: Despite its importance in the central nervous system as a precursor for acetylcholine and membrane phosphatidylcholine, the role of choline in mental illness has been little studied.
Objective: We examined the cross-sectional association between plasma choline concentrations and scores of anxiety and depression symptoms in a general population sample.
Design: We studied a subsample (n = 5918) of the Hordaland Health Study, including both sexes and 2 age groups of 46–49 and 70–74 y who had valid information on plasma choline concentrations and symptoms of anxiety and depression measured by the Hospital Anxiety and Depression Scale—the latter 2 as continuous measures and dichotomized at a score
8 for both subscales.
Results: The lowest choline quintile was significantly associated with high anxiety levels (odds ratio: 1.33; 95% CI: 1.06, 1.69) in the fully adjusted (age group, sex, time since last meal, educational level, and smoking habits) logistic regression model. Also, the trend test in the anxiety model was significant (P = 0.007). In the equivalent fully adjusted linear regression model, a significant inverse association was found between choline quintiles and anxiety levels (standardized regression coefficient = –0.027, P = 0.045). We found no significant associations in the corresponding analyses of the relation between plasma choline and depression symptoms.
Conclusion: In this large population–based study, choline concentrations were negatively associated with anxiety symptoms but not with depression symptoms.
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