Association between albumin and depression: a population-based study

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INTRODUCTION: Albumin is the most prevalent plasma protein and is involved in a variety of critical physiological processes. Low serum albumin levels have been linked to depression symptoms in people who had recent suicide attempts and those suffering from several mental diseases such as acute episodes of mania, and schizophrenia. However, there has been little investigation into the relationship between depression and serum albumin levels in community-dwelling persons. This research aimed to examine the relationship between serum albumin and depression in a population-based sample and whether it differs depending on other possible confounders. METHODS: Our data were derived from a national household population study conducted in 2017 with a sample size of 3,521 Jordanians aged > 17 years old. The Patient Health Questionnaire (PHQ-9) scale, a self-administered scale, was used to screen for depression. Concentrations of serum albumin and other medical biomarkers were measured by blood tests. Using descriptive statistics for depression distribution and multivariate logistic regression analysis, the connection between albumin levels and depression was investigated. RESULTS: The odds ratios (ORs) for depression were significantly lower in the third and fourth quartiles of serum albumin concentration compared to the first quartile (OR = 0.64 and 0.66, respectively; P values = <0.001 and <0.001, respectively). This association was statistically significant even after controlling for variables such as gender, age, marital status, education, and occupation (OR = 0.67 and 0.75, respectively, and P values = 0.001 and 0.02, respectively), as well as after further controlling for other health status variables such as nutrition, comorbidity, body mass index, somking status, and biomedical markers such as serum calcium, phosphate, and magnesium (OR = 0.58 and 0.59, respectively, and P values = <0.001 and 0.001, respectively). Moreover, the unadjusted and adjusted odds ratios in the three regression models declined linearly with rising quartiles of serum albumin (P trend = <0.001, 0.009, and 0.001, respectively). CONCLUSIONS: Our research found an inverse relationship between serum albumin and depression. Serum albumin could be a warning measure for depression. It is required for appropriate intervention measures to be implemented.

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