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Chen LW, Chu CH, Lin YC, Huang CC. The Quartile Levels of Thyroid-stimulating Hormone at Newborn Screening Stratified Risks of Neurodevelopmental Impairment in Extremely Preterm Infants: A Population Cohort Study. J Epidemiol 2024; 34:419-427. [PMID: 38191177 PMCID: PMC11330707 DOI: 10.2188/jea.je20230253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024] Open
Abstract
BACKGROUND To evaluate whether thyroid-stimulating hormone (TSH) measured during newborn screening (NBS) at birth and at discharge can be surrogate markers for neurodevelopmental impairment (NDI) in extremely preterm infants. METHODS The population cohort enrolled infants born <29 weeks' gestation in 2008-2020 in southern Taiwan. Infants with a maternal history of thyroid disorders and infants who required thyroxine supplementation during hospitalization were excluded. TSH levels measured during NBS at birth and at term-equivalent age (TEA)/discharge were respectively categorized into the lowest quartile, the interquartile range, and the highest quartile, which were correlated to NDI outcomes. RESULTS Among 392 patients with paired TSH data, 358 (91%) were prospectively followed until a corrected age of 24 months. At birth, infants with lowest-quartile TSH had higher NDI risks (odds ratio [OR] 2.3; 95% confidence interval [CI], 1.3-4.1, P = 0.004) compared to infants with interquartile-range TSH. Conversely, by TEA/discharge, infants with highest-quartile TSH had increased NDI (OR 1.9; 95% CI, 1.0-3.4, P = 0.03). By paired TSH categories, infants persistently in the lowest TSH quartile (48%; aOR 4.4; 95% CI, 1.4-14.5, P = 0.01) and those with a shift from interquartile range to the highest quartile (32%; aOR 2.7; 95% CI, 1.0-7.4, P = 0.046) had increased NDI risks compared with the reference with consistent interquartile-range TSH. CONCLUSION Extremely preterm infants persistently in the lowest-quartile TSH level at birth and at discharge had the highest NDI risk. TSH quartile levels measured during NBS may serve as a population surrogate biomarker for assessing NDI risks in infants born extremely preterm.
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Affiliation(s)
- Li-Wen Chen
- Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University
| | | | - Yung-Chieh Lin
- Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University
| | - Chao-Ching Huang
- Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University
- Department of Pediatrics, College of Medicine, Taipei Medical University
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Luo S, Hu X, Hong Y, Gao Y, Liu X, Peng Y, Tong X, Zhang X, Wen J. Risk Factors for Post-Stroke Depression Following the Lifting of COVID-19 Restrictions. Int J Gen Med 2024; 17:3479-3491. [PMID: 39161406 PMCID: PMC11331147 DOI: 10.2147/ijgm.s472339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Accepted: 08/06/2024] [Indexed: 08/21/2024] Open
Abstract
Purpose Research on post-stroke depression (PSD) following the lifting of coronavirus disease 2019 (COVID-19) restrictions remains sparse. This study aimed to investigate the factors associated with PSD after the easing of COVID-19 restriction measures. Patients and Methods This cross-sectional study was conducted with 947 stroke patients (cerebral hemorrhage and cerebral infarction) meeting the inclusion criteria. Participants completed a demographic questionnaire and the Patient Health Questionnaire-9 (PHQ-9). Additionally, data were collected on C-reactive protein (CRP), homocysteine (Hcy), modified Rankin Scale (mRS), stroke site, National Institutes of Health Stroke Scale (NIHSS), thyroid-stimulating hormone (TSH), and the Trial of ORG 10172 in Acute Stroke Treatment (TOAST) classification. This study assessed correlations between these indices and PSD. Results Stroke patients with a PHQ-9 score ≥5 were identified as having PSD, with a prevalence rate of 14.15%. No significant correlation was found between previous COVID-19 infection and PSD. However, multiple regression analysis revealed associations between PSD and the following factors: TSH (OR: 0.87, 95% CI: 0.76-1), CRP levels (OR: 1.01, 95% CI: 1-1.02), family history of stroke (OR: 4.25, 95% CI: 1.66-10.88), migraine history (OR: 8.63, 95% CI: 2.49-29.85), and shorter sleep duration (OR: 0.6, 95% CI: 0.51-0.71) (all P < 0.05). Conclusion CRP, family history of stroke, migraine, sleep duration, and TSH are identified as independent risk factors for PSD following the lifting of COVID-19 restrictions.
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Affiliation(s)
- Shangyu Luo
- Department of Neurology, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
| | - Xueqin Hu
- Department of Neurosurgery, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
| | - Yunjun Hong
- Department of Neurology, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
| | - Yunchun Gao
- Department of Neurology, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
| | - Xianglin Liu
- Department of Neurology, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
| | - Yu Peng
- Department of Neurology, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
| | - Xueqing Tong
- Department of Brain Electrophysiology, Changde Hospital, Xiangya School of Medicine, Central South University (The first People’s hospital of Changde city), Changde City, Hunan Province, People’s Republic of China
| | - Xiaobo Zhang
- Department of Neurology, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
| | - Jun Wen
- Department of Neurology, Changde Hospital, Xiangya School of Medicine, Central South University (The First People’s Hospital of Changde City), Changde City, Hunan Province, People’s Republic of China
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Aljarallah JA, Sekhar C. The Assessment of Geriatric Depression Among Primary Healthcare Physicians in Buraidah City, Saudi Arabia. Cureus 2024; 16:e62239. [PMID: 39006566 PMCID: PMC11243689 DOI: 10.7759/cureus.62239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2024] [Indexed: 07/16/2024] Open
Abstract
BACKGROUND The global geriatric population is increasing, leading to a higher prevalence of non-communicable diseases, including depression. This condition often remains underdiagnosed and untreated disease. METHODOLOGY A cross-sectional study was conducted among 130 primary healthcare physicians (PCPs) in Buraidah to assess their practices in diagnosing geriatric depression from March 2023 to March 2024. After ethical committee approval, data were collected through a self-administered questionnaire, entered, cleaned, and analyzed with Statistical Package for the Social Sciences (IBM SPSS Statistics for Windows, IBM Corp., Version 21.0, Armonk, NY). Informed consent was obtained and the confidentiality of the participant information was maintained. Statistical tests, including the Chi-square test, were used for inference. RESULTS Out of 130 PCPs, 85.4% (n=111) were diagnosing depression during their clinical practice. The most common depression scale used in their regular practice was the patient health questionnaire (PHQ)-2 (70%, n=91), followed by the Geriatric Depression Scale (53.8%, n=70). Nearly 26.2% (n=34) of physicians responded that there is no need for routine lab tests for the diagnosis of depression. Concerning the initial plan of depression management, nearly 76.2% (n=99) of physicians preferred non-pharmacological treatment. Regarding barriers to diagnosis of depression in elderly patients, nearly 76.2% (n=99) mentioned the need for more training about geriatric depression, followed by 70% for both short consultation time and the need for Ministry of Health guidelines. There was a statistically significant association observed between <35 years of age group and a preference for a high percentage of pharmacological therapy (P<0.05). CONCLUSIONS Based on the findings of the study, there was a good number (85.4%) of PCPs diagnosing depression in their clinics, and also three-fourths of the physicians (76.2%) preferred non-pharmacological treatment. Only one-fourth (26.2%) of the PCPs mentioned no lab is required for the diagnosis of depression.
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Affiliation(s)
| | - Chandra Sekhar
- Family Medicine, Family Medicine Academy, Qassim Health Cluster, Buraidah, SAU
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Roa Dueñas OH, Hofman A, Luik AI, Medici M, Peeters RP, Chaker L. The Cross-sectional and Longitudinal Association Between Thyroid Function and Depression: A Population-Based Study. J Clin Endocrinol Metab 2024; 109:e1389-e1399. [PMID: 37855318 PMCID: PMC11031221 DOI: 10.1210/clinem/dgad620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/21/2023] [Accepted: 10/16/2023] [Indexed: 10/20/2023]
Abstract
CONTEXT An association of thyroid function with mood disorders has been widely suggested, but very few studies have examined this association longitudinally. OBJECTIVE We assessed the cross-sectional and longitudinal association between thyroid function and depression in a population-based cohort. METHODS A total of 9471 individuals were included in cross-sectional analyses, of whom 8366 had longitudinal data. At baseline, we assessed thyroid function using serum samples (thyrotropin [TSH], free thyroxine (FT4), and thyroid peroxidase antibodies) and depressive symptoms using the Centre for Epidemiologic Studies Depression (CES-D) scale. Incident depressive events (n = 1366) were continuously followed up with the CES-D and clinical interviews. We analyzed the cross-sectional association of thyroid function and thyroid disease with depressive symptoms using linear and logistic regression, and the longitudinal association with Cox proportional hazard models for depressive events. RESULTS Lower TSH levels and lower and higher FT4 levels were cross-sectionally associated with more depressive symptoms with a B value of -0.07 per 1 unit increase of natural log-transformed TSH (95% CI -0.11; -0.04). Furthermore, hypothyroidism was cross-sectionally associated with less depressive symptoms and hyperthyroidism with more depressive symptoms. Longitudinally, there was a U-shaped association between FT4 and incident depressive events but only in euthyroid participants. CONCLUSION We show a cross-sectional association between thyroid (dys)function with depressive symptoms, and a U-shaped association between FT4 and incident depressive events in euthyroid individuals. Our findings suggest an association of thyroid function with the risk of developing depression, albeit small. Reverse causation and additional underlying factors may also contribute to the association.
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Affiliation(s)
| | - Amy Hofman
- Department of Epidemiology, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
| | - Annemarie I Luik
- Department of Epidemiology, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
- Trimbos Institute—The Netherlands Institute of Mental Health and
Addiction, 3521 VS Utrecht, The Netherlands
| | - Marco Medici
- Academic Center for Thyroid Diseases, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
- Department of Internal Medicine, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
| | - Robin P Peeters
- Academic Center for Thyroid Diseases, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
- Department of Internal Medicine, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
| | - Layal Chaker
- Department of Epidemiology, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
- Academic Center for Thyroid Diseases, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
- Department of Internal Medicine, Erasmus University Medical
Center, 3000 CA Rotterdam, The Netherlands
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Huang X, Sun Y, Wu A, Zhang XY. Gender differences in the prevalence and clinical correlates of thyroid dysfunction in patients with first-episode and drug-naïve major depressive disorder with comorbid suicide attempts: a large cross-sectional study. BMC Psychiatry 2023; 23:603. [PMID: 37596572 PMCID: PMC10436425 DOI: 10.1186/s12888-023-05089-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 08/08/2023] [Indexed: 08/20/2023] Open
Abstract
BACKGROUND Gender differences in patients with major depressive disorder (MDD) are commonly reported; however, gender differences in first-episode and drug-naïve (FEDN) MDD patients with comorbid suicide attempts have not been reported. This study aimed to examine potential gender differences in the prevalence and clinical correlates of comorbid abnormal thyroid function (ATF) in FEDN MDD patients with comorbid suicide attempts. METHODS A cross-sectional study of 1718 FEDN MDD patients was conducted. The demographic and clinical data were collected. The Hamilton Depression Scale (HAMD), the Hamilton Anxiety Scale (HAMA) and Positive and Negative Syndrome Scale (PANSS) were used to assess depression, anxiety and psychotic symptoms, respectively. Thyroid function parameters and blood glucose levels were measured. RESULTS There was no gender difference in the prevalence of ATF between male (78.6%, 88/112) and female MDD patients (74.8%, 175/234) with comorbid suicide attempts. In the male and female subgroups, duration of disease, HAMD score, HAMA score, anti-thyroglobulin (TgAb), thyroid peroxidases antibody (TPOAb), diastolic blood pressure (DBP), systolic blood pressure (SBP), glucose level and the rate of psychotic symptoms were higher in patients with ATF than those without ATF in MDD with comorbid suicide attempt (all P < 0.05). There was a gender main effect only on SBP (F = 7.35, P = 0.007). Furthermore, binary logistic regression analysis showed that HAMD score, DBP and glucose levels were independently with ATF in both male and female MDD patients with comorbid suicide attempts. However, anxiety symptoms, psychotic symptoms and TPOAb levels were significantly associated with ATF only in female MDD patients with comorbid suicide attempts. CONCLUSION Our study showed no gender differences in the prevalence of ATF in FEDN MDD patients with comorbid suicide attempts. Depression, DBP and glucose levels were associated with ATF in both male and female MDD patients with comorbid suicide attempts, whereas anxiety, psychotic symptoms and TPOAb level were correlated with ATF only in female MDD patients with suicide attempts.
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Affiliation(s)
- Xiao Huang
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Yuan Sun
- Department of Pharmacy, Peking University Third Hospital, Beijing, China
| | - Anshi Wu
- Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Xiang-Yang Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.
- Department of Psychology, University of Chinese Academy of Sciences, 16 Lincui Road, Chaoyang District, Beijing, 100101, China.
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Odawara S, Shimbo T, Yamauchi T, Kobayashi D. Association of Low-Normal Free T4 Levels With Future Major Depression Development. J Endocr Soc 2023; 7:bvad096. [PMID: 37528949 PMCID: PMC10387582 DOI: 10.1210/jendso/bvad096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Indexed: 08/03/2023] Open
Abstract
Context Hyperthyroidism and overt and subclinical hypothyroidism are associated with major depression; however, the association of major depression across the spectrum of thyroid function within the normal range is unknown. Objective We investigated whether higher or lower levels of free thyroxine (T4) and thyrotropin (TSH) within the normal range are associated with major depression. Methods This was a retrospective cohort study of 66 960 participants with normal thyroid function who visited for health checkups (St. Luke's International Hospital, 2005-2018). The primary outcome was the development of major depression during the follow-up period. Participants were divided into 3 equal groups based on baseline free T4 or TSH values (low-, middle-, or high-normal), and the incidence of major depression was compared using the Cox proportional hazard model after adjusting for potential covariates. Results During the median follow-up of 1883 days, 1363 (2.0%) patients developed major depression. The low-normal free T4 group had a significantly higher risk of major depression (adjusted HR 1.15; 95% CI, 1.01-1.31), but not the high-normal free T4 group or TSH groups. The association between low-normal free T4 and the development of major depression was maintained, rather more obvious, upon exclusion of participants whose thyroid hormone levels became abnormal during follow-up compared with data from all participants (adjusted HR 1.24; 95% CI, 1.07-1.43). Conclusion In this cohort, low-normal free T4 was associated with an increased risk of future major depression, even if subsequent hormone levels were maintained within the normal range. The magnitude of the impact of low-normal free T4 was relatively mild.
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Affiliation(s)
- Sara Odawara
- Correspondence: Sara Odawara, MD, PhD, Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Takuro Shimbo
- Department of Medicine, Ohta Nishinouchi Hospital, Fukushima 963-8558, Japan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Daiki Kobayashi
- Division of General Internal Medicine, Department of Medicine, Tokyo Medical University Ibaraki Medical Center, Ibaraki 300-0332, Japan
- Department of Medicine, Fujita Health University, Aichi 470-1192, Japan
- Department of General Medicine, Juntendo University Faculty of Medicine, Tokyo 113-8421, Japan
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Kumar R, LeMahieu AM, Stan MN, Seshadri A, Ozerdem A, Pazdernik VK, Haynes TL, Daugherty DH, Sundaresh V, Veldic M, Croarkin PE, Frye MA, Singh B. The Association Between Thyroid Stimulating Hormone and Depression: A Historical Cohort Study. Mayo Clin Proc 2023; 98:1009-1020. [PMID: 37419569 PMCID: PMC10554405 DOI: 10.1016/j.mayocp.2022.12.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 12/02/2022] [Accepted: 12/29/2022] [Indexed: 07/09/2023]
Abstract
OBJECTIVE To investigate the association between thyroid-stimulating hormone (TSH) and clinically relevant depression (CRD) in a population-based study. PATIENTS AND METHODS Adult patients (≥18 years of age) who received care at Mayo Clinic in Rochester, Minnesota, and completed a TSH and Patient Health Questionnaire - 9 (PHQ-9) within 6 months of each other, between July 8, 2017, and August 31, 2021, were included. Demographics, medical comorbidities, thyroid function laboratory data, psychotropic medications, presence of primary thyroid disorder, thyroid hormone replacement (T4 and/or T3), and mood disorder diagnoses (using International Classification of Diseases, 10th version, Clinical Modifications codes) were extracted electronically. The primary outcome, CRD, was defined as a PHQ-9 score greater than or equal to 10. Logistic regression analysis was conducted to assess the association between TSH categories (low ≤0.3 mIU/L; normal >0.3-4.2 mIU/L; high >4.2 mIU/L) and CRD. RESULTS The cohort included 29,034 patients, mean age 51.4 years, 65% females, 89.9% White, and a mean body mass index of 29.9 kg/m2. The mean ± standard deviation for TSH was 3.0±8.5 mIU/L, and the mean PHQ-9 score was 6.3±6.2. After adjustment, the odds of CRD were significantly higher among the low TSH category (odds ratio, 1.37; 95% CI, 1.18-1.57; P<.001) compared with the normal TSH category, especially in people 70 years of age or younger compared with people older than 70 years of age. Subgroup analysis did not show an increase in odds of CRD among patients with subclinical/overt hypothyroidism/hyperthyroidism (after adjustment). CONCLUSION In this large population-based cross-sectional study, we report that low TSH was associated with higher odds of depression. Future longitudinal cohort studies are needed to investigate the relationship between thyroid dysfunction and depression as well as sex differences.
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Affiliation(s)
- Rakesh Kumar
- Department of Psychiatry & Psychology, Mayo Clinic, Rochester, Minnesota, USA.
| | - Allison M LeMahieu
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Marius N Stan
- Division of Endocrinology, Diabetes, Metabolism, Nutrition, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Ashok Seshadri
- Department of Psychiatry & Psychology, Mayo Clinic, Rochester, Minnesota, USA
| | - Aysegul Ozerdem
- Department of Psychiatry & Psychology, Mayo Clinic, Rochester, Minnesota, USA
| | - Vanessa K Pazdernik
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Tara L Haynes
- IT Executive Administration and Data Solution Services, Mayo Clinic, Rochester, Minnesota, USA
| | - David H Daugherty
- IT Executive Administration and Data Solution Services, Mayo Clinic, Rochester, Minnesota, USA
| | - Vishnu Sundaresh
- Division of Endocrinology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Marin Veldic
- Department of Psychiatry & Psychology, Mayo Clinic, Rochester, Minnesota, USA
| | - Paul E Croarkin
- Department of Psychiatry & Psychology, Mayo Clinic, Rochester, Minnesota, USA
| | - Mark A Frye
- Department of Psychiatry & Psychology, Mayo Clinic, Rochester, Minnesota, USA
| | - Balwinder Singh
- Department of Psychiatry & Psychology, Mayo Clinic, Rochester, Minnesota, USA
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Santhanam P, Nath T, Lindquist MA, Cooper DS. Relationship Between TSH Levels and Cognition in the Young Adult: An Analysis of the Human Connectome Project Data. J Clin Endocrinol Metab 2022; 107:1897-1905. [PMID: 35389477 DOI: 10.1210/clinem/dgac189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT The nature of the relationship between serum thyrotropin (TSH) levels and higher cognitive abilities is unclear, especially within the normal reference range and in the younger population. OBJECTIVE To assess the relationship between serum TSH levels and mental health and sleep quality parameters (fluid intelligence [Gf], MMSE (Mini-Mental State Examination), depression scores, and, finally, Pittsburgh Sleep Quality Index (PSQI) scores (working memory, processing speed, and executive function) in young adults. METHODS This was a retrospective analysis of the data from the Human Connectome Project (HCP). The HCP consortium is seeking to map human brain circuits systematically and identify their relationship to behavior in healthy adults. Included were 391 female and 412 male healthy participants aged 22-35 years at the time of the screening interview. We excluded persons with serum TSH levels outside the reference range (0.4-4.5 mU/L). TSH was transformed logarithmically (log TSH). All the key variables were normalized and then linear regression analysis was performed to assess the relationship between log TSH as a cofactor and Gf as the dependent variable. Finally, a machine learning method, random forest regression, predicted Gf from the dependent variables (including alcohol and tobacco use). The main outcome was normalized Gf (nGf) and Gf scores. RESULTS Log TSH was a significant co-predictor of nGF in females (β = 0.31(±0.1), P < .01) but not in males. Random forest analysis showed that the model(s) had a better predictive value for females (r = 0.39, mean absolute error [MAE] = 0.81) than males (r = 0.24, MAE = 0.77). CONCLUSION Higher serum TSH levels might be associated with higher Gf scores in young women.
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Affiliation(s)
- Prasanna Santhanam
- Division of Endocrinology, Diabetes, & Metabolism, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Tanmay Nath
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Martin A Lindquist
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - David S Cooper
- Division of Endocrinology, Diabetes, & Metabolism, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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