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Trends in the environmental risks associated with earlier onset in multiple sclerosis. Mult Scler Relat Disord 2022; 68:104250. [PMID: 36544313 DOI: 10.1016/j.msard.2022.104250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/27/2022] [Accepted: 10/16/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND Several environmental and lifestyle factors relating to sunlight/vitamin D, body mass index (BMI), and smoking are associated with the risk of developing multiple sclerosis (MS). However, their relation to disease progression, particularly age at symptomatic onset, remains inconsistent, which may be the result of significant changes in human-environment interactions over the last century. This study investigates historical trends in the association between common MS environmental risk factors and age at disease onset. METHODS Using a narrative approach, we evaluated the current literature for published studies assessing the association between vitamin-D, BMI, and tobacco smoking exposures with the risk of early/pediatric-onset MS and direct correlations with age at MS onset using MEDLINE, EMBASE, and Web of Science. Measures were plotted by the average calendar year of disease onset for each cohort to examine trends over time. In total, 25, 9, and 11 articles were identified for vitamin D, BMI, and smoking-related exposures, respectively. RESULTS Higher sun exposure habits and residential solar radiation were associated with older age at onset. On the contrary, two studies observed a negative correlation between age at onset and serum 25-hydroxyvitamin D (25(OH)D) levels. Higher adolescent BMI was generally associated with younger age at onset, although genetic susceptibility for childhood obesity was not significantly associated. Tobacco smoking was associated with later disease onset, despite being a risk factor for MS. Association with age at onset was inflated for more recent studies relating to smoking, while often weaker for serum vitamin D and BMI. CONCLUSION Current findings indicate a likely association between age at onset and environmental risk factors, such as sun exposure, adolescent BMI, and tobacco smoking, in certain populations. However, findings are often inconsistent and assessment of the relationships and potential changes over time require further investigation.
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2
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Nociti V, Romozzi M. Multiple Sclerosis and Autoimmune Comorbidities. J Pers Med 2022; 12:jpm12111828. [PMID: 36579555 PMCID: PMC9698878 DOI: 10.3390/jpm12111828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/17/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic inflammatory and neurodegenerative disease of the central nervous system characterized by broad inter- and intraindividual heterogeneity and different prognoses. Multisystem comorbidities are frequent features in people with MS (PwMS) and can affect treatment choices, quality of life, disability and mortality. In this scenario, autoimmune comorbidities play a cardinal role for several reasons, such as the implication on MS pathogenesis, diagnostic delay, disease activity, disability progression, brain atrophy, and treatment choice. However, the impact of an autoimmune comorbid condition on MS is not fully elucidated. This review aims to summarize the currently available data on the incidence and prevalence of autoimmune diseases in PwMS, the possible effect of this association on clinical and neuroradiological MS course and its impact on treatment choice.
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Affiliation(s)
- Viviana Nociti
- Centro Sclerosi Multipla, Fondazione Policlinico Universitario ‘Agostino Gemelli’ IRCCS, 00168 Rome, Italy
- Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Correspondence:
| | - Marina Romozzi
- Centro Sclerosi Multipla, Fondazione Policlinico Universitario ‘Agostino Gemelli’ IRCCS, 00168 Rome, Italy
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3
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Ajdacic-Gross V, Steinemann N, Horváth G, Rodgers S, Kaufmann M, Xu Y, Kamm CP, Kesselring J, Manjaly ZM, Zecca C, Calabrese P, Puhan MA, von Wyl V. Onset Symptom Clusters in Multiple Sclerosis: Characteristics, Comorbidities, and Risk Factors. Front Neurol 2021; 12:693440. [PMID: 34295301 PMCID: PMC8290323 DOI: 10.3389/fneur.2021.693440] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 06/09/2021] [Indexed: 11/22/2022] Open
Abstract
Background: Multiple sclerosis (MS) symptoms are expected to aggregate in specific patterns across different stages of the disease. Here, we studied the clustering of onset symptoms and examined their characteristics, comorbidity patterns and associations with potential risk factors. Methods: Data stem from the Swiss Multiple Sclerosis Registry, a prospective study including 2,063 participants by November 2019. MS onset symptoms were clustered using latent class analysis (LCA). The latent classes were further examined using information on socio-demographic characteristics, MS-related features, potential risk factors, and comorbid diseases. Results: The LCA model with six classes (frequencies ranging from 12 to 24%) was selected for further analyses. The latent classes comprised a multiple symptoms class with high probabilities across several symptoms, contrasting with two classes with solitary onset symptoms: vision problems and paresthesia. Two gait classes emerged between these extremes: the gait-balance class and the gait-paralysis class. The last class was the fatigue-weakness-class, also accompanied by depression symptoms, memory, and gastro-intestinal problems. There was a moderate variation by sex and by MS types. The multiple symptoms class yielded increased comorbidity with other autoimmune disorders. Similar to the fatigue-weakness class, the multiple symptoms class showed associations with angina, skin diseases, migraine, and lifetime prevalence of smoking. Mononucleosis was more frequently reported in the fatigue-weakness and the paresthesia class. Familial aggregation did not differ among the classes. Conclusions: Clustering of MS onset symptoms provides new perspectives on the heterogeneity of MS. The clusters comprise different potential risk factors and comorbidities. They point toward different risk mechanisms.
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Affiliation(s)
- Vladeta Ajdacic-Gross
- Swiss MS Registry, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Nina Steinemann
- Swiss MS Registry, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Gábor Horváth
- Swiss MS Registry, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Stephanie Rodgers
- Swiss MS Registry, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Marco Kaufmann
- Swiss MS Registry, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Yanhua Xu
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich, Switzerland
| | - Christian P Kamm
- Department of Neurology, Inselspital, University Hospital Bern and University of Bern, Bern, Switzerland.,Neurocentre, Luzerner Kantonsspital, Lucerne, Switzerland
| | - Jürg Kesselring
- Department of Neurology and Neurorehabilitation, Rehabilitation Centre Kliniken Valens, Valens, Switzerland
| | - Zina-Mary Manjaly
- Department of Neurology, Schulthess Clinic, Zurich, Switzerland.,Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Chiara Zecca
- Department of Neurology, Multiple Sclerosis Center (MSC), Neurocenter of Southern Switzerland, Lugano, Switzerland.,Faculty of Biomedical Sciences, Università della Svizzera Italiana (USI), Lugano, Switzerland
| | - Pasquale Calabrese
- Division of Molecular and Cognitive Neuroscience, University of Basel, Basel, Switzerland
| | - Milo A Puhan
- Swiss MS Registry, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Viktor von Wyl
- Swiss MS Registry, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
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4
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Affiliation(s)
- Anna Karin Hedström
- Department of Clinical Neuroscience and Institute of Environmental Medicine, Karolinska Institutet , Stockholm, Sweden
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5
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Affiliation(s)
- Mattia Rosso
- Ann Romney Center for Neurologic Disease, Harvard Medical School, Boston, Massachusetts
| | - Tanuja Chitnis
- Ann Romney Center for Neurologic Disease, Harvard Medical School, Boston, Massachusetts
- Partners Multiple Sclerosis Center, Department of Neurology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
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6
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Zarei S, Maldonado I, Franqui-Dominguez L, Rubi C, Rosa YT, Diaz-Marty C, Coronado G, Nieves MCR, Akhlaghipour G, Chinea A. Impact of delayed treatment on exacerbations of multiple sclerosis among Puerto Rican patients. Surg Neurol Int 2019; 10:200. [PMID: 31768280 PMCID: PMC6826276 DOI: 10.25259/sni_252_2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 08/26/2019] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND There are limited data on multiple sclerosis (MS) patients in underserved groups, including Puerto Rico. In this study, we analyzed the characteristic of MS symptoms and number of relapses in Puerto Rican patients. We then compare these characteristics with MS patients from the US. The number of MS relapses is highly correlated with the treatment onset and adherence. Patients in Puerto Rico have been experiencing lengthy treatment delay. We will discuss the possible causes of such delay and its impact on MS prognosis. METHODS This retrospective cohort study consisted of the evaluation of 325 medical records from MS patients attending the Caribbean Neurological Center from 2014 to 2019. We gathered symptoms and comorbidities data as binary objects. The treatment delay was calculated based on the mean value of days between diagnosis and treatment onset for these groups of patients. RESULTS We found that on average, the treatment delay for MS patients in Puerto Rico (PR) to receive their medication was 120 days. The most common MS subtype was relapsing-remitting 72.8%, with a mean of 1.684 relapses per year. Initial symptoms were sensory 54%, visual 33.1%, motor 28.8%, coordination 23.2%, fatigue 9.7%, memory 7.3%, depression 6.5%, urinary 4.9%, gastrointestinal 2.4%, and sexual dysfunction 1.6%. The most common comorbidities were hypertension 18.4%, asthma 13.6%, and thyroid disease 12.8%. When we compared the comorbidities between the two populations, immune thrombocytopenia had the highest percent change with the value of almost 200% (0.001% of US patient vs. 0.8% of Puerto Rican MS patients). CONCLUSION Patients from Puerto Rico had a 33% higher relapse rate compared to the one reported for MS patients in the US. This higher rate may be related to the long delay in receiving their medications. They also had a higher rate of complex comorbidities such as immune thrombocytopenia or thyroid disease. Our findings provide a proof of concept that delay in receiving medications can increase the number of relapses and complex comorbidities among MS patients.
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Affiliation(s)
- Sara Zarei
- Department of Neurology, San Juan Bautista School of Medicine, Caguas, Puerto Rico, USA
| | - Irvin Maldonado
- Department of Neurology, San Juan Bautista School of Medicine, Caguas, Puerto Rico, USA
| | | | | | - Yanibel Tapia Rosa
- Department of Neurology, San Juan Bautista School of Medicine, Caguas, Puerto Rico, USA
| | - Cristina Diaz-Marty
- Department of Neurology, San Juan Bautista School of Medicine, Caguas, Puerto Rico, USA
| | - Guadalupe Coronado
- Department of Neurology, San Juan Bautista School of Medicine, Caguas, Puerto Rico, USA
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The link between smoking status and co-morbid conditions in individuals with multiple sclerosis (MS). Disabil Health J 2017; 10:587-591. [DOI: 10.1016/j.dhjo.2017.03.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 12/27/2016] [Accepted: 03/10/2017] [Indexed: 12/16/2022]
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8
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Affiliation(s)
- Julie Vadboncoeur
- Resident in Ophthalmology, Université de Montréal, Montreal, Quebec, Canada
| | - Katarzyna Biernacki
- Department of Ophthalmology, Hôpital Notre-Dame (CHUM), Montreal, Quebec, Canada
| | - Alexandre Prat
- Department of Neurology, Hôpital Notre-Dame (CHUM), Montreal, Quebec, Canada
| | - Laurence Jaworski
- Department of Ophthalmology, Hôpital Notre-Dame (CHUM), Montreal, Quebec, Canada
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Newland P, Flick L, Xian H, Thomas FP. Symptom Co-occurrences Associated with Smoking in Individuals with Relapsing-Remitting Multiple Sclerosis. Int J MS Care 2016; 18:163-8. [PMID: 27551240 DOI: 10.7224/1537-2073.2014-028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND The impact of tobacco on the multiple sclerosis (MS) disease process and symptoms is complex and not clearly understood. Tobacco may be used to self-treat some symptoms but also seems to intensify others. Studies to date have not characterized co-occurring symptoms (symptom patterns) and their association with tobacco use. METHODS This study describes tobacco use in patients with relapsing-remitting MS and associated symptoms and symptom co-occurrences. In this cross-sectional study, 101 participants with an average age of 43 years completed a survey adapted from the Behavioral Risk Factor Surveillance System and the revised MS-Related Symptom Checklist. Data reduction was performed using factor analysis on the 43 items of the checklist, and linear regression was used to detect associations between symptom clusters (factors) and smoking. RESULTS Using the factor analysis result, the linear regression analysis found that tobacco use is positively associated with co-occurring symptoms and symptoms of factor 1: Mental/Emotional (anxiety, loneliness, depression, and difficulty sleeping) and factor 4: Neuro/Autonomic (urinary). CONCLUSIONS Smoking is associated with patterns of symptoms. The study of MS and tobacco use over time will allow determination of the temporal pattern of tobacco use and MS symptoms.
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Tseng CC, Chang SJ, Tsai WC, Ou TT, Wu CC, Sung WY, Hsieh MC, Yen JH. Increased incidence of rheumatoid arthritis in multiple sclerosis: A nationwide cohort study. Medicine (Baltimore) 2016; 95:e3999. [PMID: 27368008 PMCID: PMC4937922 DOI: 10.1097/md.0000000000003999] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Past studies have shown inconsistent results on whether there is an association between multiple sclerosis (MS) and rheumatoid arthritis. To investigate the possible relationship between the 2 autoimmune diseases, we performed a nationwide cohort study utilizing the National Health Insurance Research Database and the Registry of Catastrophic Illness.A total of 1456 newly diagnosed patients with MS and 10,362 control patients were matched for age, sex, and initial diagnosis date. Patients with MS had a higher incidence of rheumatoid arthritis (age-adjusted standardized incidence ratio: 1.72; 95% confidence interval = 1.01-2.91). There was a positive correlation in being diagnosed with rheumatoid arthritis in patients previously diagnosed with MS when stratified by sex and age. The strength of this association remained statistically significant after adjusting for sex, age, and smoking history (hazard ratio: 1.78, 95% confidence interval = 1.24-2.56, P = 0.002).In conclusion, this study demonstrates that a diagnosis of MS increased the likelihood of a subsequent diagnosis of rheumatoid arthritis in patients, independent of sex, age, and smoking history.
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Affiliation(s)
- Chia-Chun Tseng
- Department of Internal Medicine, Kaohsiung Municipal Ta-Tung Hospital
| | - Shun-Jen Chang
- Department of Kinesiology, Health and Leisure Studies, National University of Kaohsiung
- Correspondence: Shun-Jen Chang, Department of Kinesiology, Health and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (e-mail: ); Jeng-Hsien Yen, Division of Rheumatology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan (e-mail: )
| | - Wen-Chan Tsai
- Division of Rheumatology, Department of Internal Medicine, Kaohsiung Medical University Hospital
| | - Tsan-Teng Ou
- Division of Rheumatology, Department of Internal Medicine, Kaohsiung Medical University Hospital
| | - Cheng-Chin Wu
- Division of Rheumatology, Department of Internal Medicine, Kaohsiung Medical University Hospital
| | - Wan-Yu Sung
- Division of Rheumatology, Department of Internal Medicine, Kaohsiung Medical University Hospital
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung
| | - Ming-Chia Hsieh
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Changhua Christian Hospital, Changhua
- Graduate Institute of Integrated Medicine, China Medical University, Taichung
| | - Jeng-Hsien Yen
- Division of Rheumatology, Department of Internal Medicine, Kaohsiung Medical University Hospital
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
- Correspondence: Shun-Jen Chang, Department of Kinesiology, Health and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (e-mail: ); Jeng-Hsien Yen, Division of Rheumatology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan (e-mail: )
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11
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Marck CH, Neate SL, Taylor KL, Weiland TJ, Jelinek GA. Prevalence of Comorbidities, Overweight and Obesity in an International Sample of People with Multiple Sclerosis and Associations with Modifiable Lifestyle Factors. PLoS One 2016; 11:e0148573. [PMID: 26849357 PMCID: PMC4743906 DOI: 10.1371/journal.pone.0148573] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 01/19/2016] [Indexed: 11/29/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic neurological disorder, often affecting young people. Comorbid disorders such as depression, anxiety and hypertension are common and can affect disease course, treatment, and quality of life (QOL) of people with MS (PwMS). The associations between comorbidities, body mass index (BMI) and health outcomes are not well studied in MS, although research shows most PwMS are overweight. Most data on the prevalence of comorbidities and obesity in PwMS comes from North American populations. This study describes the prevalence of comorbidities, overweight and obesity and associations with modifiable factors in an international sample of PwMS recruited online through social media, MS societies and websites. The online survey consisted of validated and researcher-devised instruments to assess self-reported health outcomes and lifestyle behaviors. Of the 2399 respondents, 22.5% were overweight, 19.4% were obese and 67.2% reported at least one comorbidity, with back pain (36.2%), depression (31.7%), anxiety (29.1%) and arthritis (13.7%) most prevalent and most limiting in daily activities. Obesity and most comorbid disorders were significantly more prevalent in North America. Obese participants were more likely to have comorbidities, especially diabetes (OR 4.8) and high blood pressure (OR 4.5) but also depression (OR 2.2). Being overweight, obese, or a former, or current smoker was associated with an increase in the number of comorbidities; while healthy diet, physical activity (borderline significant) and moderate alcohol consumption were associated with decreased number of comorbidities. Increasing number of comorbidities was related to worse QOL, increased odds of disability and prior relapse. Obese PwMS had higher odds of disability and lower QOL. The associations between BMI, comorbidities and health outcomes are likely to be bi-directional and associated with lifestyle behaviors. Preventing and treating comorbid disorders and obesity in PwMS is warranted, and advice regarding healthy and risky lifestyle may assist in improving health outcomes.
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Affiliation(s)
- Claudia Helena Marck
- Neuroepidemiology Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - Sandra Leanne Neate
- Neuroepidemiology Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - Keryn Louise Taylor
- Neuroepidemiology Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - Tracey Joy Weiland
- Neuroepidemiology Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - George Alexander Jelinek
- Neuroepidemiology Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
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12
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Marrie RA, Cohen J, Stuve O, Trojano M, Sørensen PS, Reingold S, Cutter G, Reider N. A systematic review of the incidence and prevalence of comorbidity in multiple sclerosis: overview. Mult Scler 2015; 21:263-81. [PMID: 25623244 PMCID: PMC4361468 DOI: 10.1177/1352458514564491] [Citation(s) in RCA: 248] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Background: Comorbidity is an area of increasing interest in multiple sclerosis (MS). Objective: The objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies. Methods: We searched the PubMed, SCOPUS, EMBASE and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles. Two reviewers independently screened abstracts. One reviewer abstracted data using a standardized form and the abstraction was verified by a second reviewer. We assessed study quality using a standardized approach. We quantitatively assessed population-based studies using the I2 statistic, and conducted random-effects meta-analyses. Results: We included 249 articles. Study designs were variable with respect to source populations, case definitions, methods of ascertainment and approaches to reporting findings. Prevalence was reported more frequently than incidence; estimates for prevalence and incidence varied substantially for all conditions. Heterogeneity was high. Conclusion: This review highlights substantial gaps in the epidemiological knowledge of comorbidity in MS worldwide. Little is known about comorbidity in Central or South America, Asia or Africa. Findings in North America and Europe are inconsistent. Future studies should report age-, sex- and ethnicity-specific estimates of incidence and prevalence, and standardize findings to a common population.
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Affiliation(s)
- Ruth Ann Marrie
- Department of Internal Medicine, University of Manitoba, Canada/Department of Community Health Sciences, University of Manitoba, Health Sciences Center, Canada
| | - Jeffrey Cohen
- Mellen Center for MS Treatment and Research, Cleveland Clinic, USA
| | - Olaf Stuve
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern, USA
| | - Maria Trojano
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | | | | | - Gary Cutter
- Department of Biostatistics, University of Alabama at Birmingham, USA
| | - Nadia Reider
- Department of Internal Medicine, University of Manitoba, Canada
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13
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Marrie RA, Reider N, Stuve O, Trojano M, Sorensen PS, Cutter GR, Reingold SC, Cohen J. The incidence and prevalence of comorbid gastrointestinal, musculoskeletal, ocular, pulmonary, and renal disorders in multiple sclerosis: A systematic review. Mult Scler 2014; 21:332-41. [PMID: 25538150 PMCID: PMC4429162 DOI: 10.1177/1352458514564488] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background: As new disease-modifying therapies emerge a better knowledge of the risk of comorbid disease in multiple sclerosis (MS) is needed. Objective: To estimate the incidence and prevalence of comorbid gastrointestinal, musculoskeletal, ocular, pulmonary, and renal disorders in MS. Methods: We systematically reviewed the world literature by searching PUBMED, EMBASE, SCOPUS, the Web of Knowledge, and reference lists of retrieved articles. For selected articles, one reviewer abstracted data using a standardized form. The abstraction was verified by a second reviewer. The quality of all selected studies was assessed. For population-based studies we quantitatively assessed studies using the I2 statistic, and conducted random effects meta-analyses. Results: Study designs were heterogeneous with respect to populations, case definitions, and methods of ascertainment. Incidence of the studied comorbidities was rarely reported. Irritable bowel syndrome and chronic lung disease had a prevalence of more than 10% in the MS population. Irritable bowel syndrome, fibromyalgia, cataracts and glaucoma were more common than expected in the MS population. Conclusion: Although they have been the subject of less study than other comorbidities, irritable bowel syndrome, arthritis, and chronic lung disease are common in the MS population and occur more often than expected when compared to the general population.
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Affiliation(s)
- Ruth Ann Marrie
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada/Department of Community Health Sciences, University of Manitoba, Winnipeg, Canada
| | - Nadia Reider
- Department of Internal Medicine, University of Manitoba, Winnipeg, Canada
| | - Olaf Stuve
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern, Dallas, TX, USA
| | - Maria Trojano
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
| | | | - Gary R Cutter
- Department of Biostatistics, University of Alabama at Birmingham, USA
| | | | - Jeffrey Cohen
- Mellen Center for MS Treatment and Research, Cleveland Clinic, Cleveland, OH, USA
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Marrie RA, Reider N, Cohen J, Stuve O, Sorensen PS, Cutter G, Reingold SC, Trojano M. A systematic review of the incidence and prevalence of autoimmune disease in multiple sclerosis. Mult Scler 2014; 21:282-93. [PMID: 25533299 PMCID: PMC4429166 DOI: 10.1177/1352458514564490] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background: As new therapies emerge which increase the risk of autoimmune disease it is increasingly important to understand the incidence of autoimmune disease in multiple sclerosis (MS). Objective: The purpose of this review is to estimate the incidence and prevalence of comorbid autoimmune disease in MS. Methods: The PUBMED, EMBASE, SCOPUS and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles were searched, and abstracts were independently screened by two reviewers. The data were abstracted by one reviewer using a standardized data collection form, and the findings were verified by a second reviewer. We assessed quality of the included studies using a standardized approach and conducted meta-analyses of population-based studies. Results: Sixty-one articles met the inclusion criteria. We observed substantial heterogeneity with respect to the populations studied, methods of ascertaining comorbidity, and reporting of findings. Based solely on population-based studies, the most prevalent autoimmune comorbidities were psoriasis (7.74%) and thyroid disease (6.44%). Our findings also suggest an increased risk of inflammatory bowel disease, likely uveitis and possibly pemphigoid. Conclusion: Fewer than half of the studies identified were of high quality. Population-based studies that report age, sex and ethnicity-specific estimates of incidence and prevalence are needed in jurisdictions worldwide.
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Affiliation(s)
- Ruth Ann Marrie
- Departments of Internal Medicine and Community Health Sciences, University of Manitoba, Canada
| | - Nadia Reider
- Departments of Internal Medicine and Community Health Sciences, University of Manitoba, Canada
| | - Jeffrey Cohen
- Mellen Center for MS Treatment and Research, Cleveland Clinic, USA
| | - Olaf Stuve
- Department of Neurology and Neurotherapeutics, University of Texas Southwestern, USA
| | - Per S Sorensen
- Department of Neurology, Copenhagen University Hospital Rigshospitalet, Denmark
| | - Gary Cutter
- Department of Biostatistics, University of Alabama at Birmingham, USA
| | | | - Maria Trojano
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
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15
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Chang D, Keinan A. Principal component analysis characterizes shared pathogenetics from genome-wide association studies. PLoS Comput Biol 2014; 10:e1003820. [PMID: 25211452 PMCID: PMC4161298 DOI: 10.1371/journal.pcbi.1003820] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 07/19/2014] [Indexed: 01/04/2023] Open
Abstract
Genome-wide association studies (GWASs) have recently revealed many genetic associations that are shared between different diseases. We propose a method, disPCA, for genome-wide characterization of shared and distinct risk factors between and within disease classes. It flips the conventional GWAS paradigm by analyzing the diseases themselves, across GWAS datasets, to explore their "shared pathogenetics". The method applies principal component analysis (PCA) to gene-level significance scores across all genes and across GWASs, thereby revealing shared pathogenetics between diseases in an unsupervised fashion. Importantly, it adjusts for potential sources of heterogeneity present between GWAS which can confound investigation of shared disease etiology. We applied disPCA to 31 GWASs, including autoimmune diseases, cancers, psychiatric disorders, and neurological disorders. The leading principal components separate these disease classes, as well as inflammatory bowel diseases from other autoimmune diseases. Generally, distinct diseases from the same class tend to be less separated, which is in line with their increased shared etiology. Enrichment analysis of genes contributing to leading principal components revealed pathways that are implicated in the immune system, while also pointing to pathways that have yet to be explored before in this context. Our results point to the potential of disPCA in going beyond epidemiological findings of the co-occurrence of distinct diseases, to highlighting novel genes and pathways that unsupervised learning suggest to be key players in the variability across diseases.
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Affiliation(s)
- Diana Chang
- Department of Biological Statistics & Computational Biology, Cornell University, Ithaca, New York, United States of America
- Program in Computational Biology and Medicine, Cornell University, Ithaca, New York, United States of America
- * E-mail: (DC); (AK)
| | - Alon Keinan
- Department of Biological Statistics & Computational Biology, Cornell University, Ithaca, New York, United States of America
- Program in Computational Biology and Medicine, Cornell University, Ithaca, New York, United States of America
- * E-mail: (DC); (AK)
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Ploughman M, Beaulieu S, Harris C, Hogan S, Manning OJ, Alderdice PW, Fisk JD, Sadovnick AD, O'Connor P, Morrow SA, Metz LM, Smyth P, Mayo N, Marrie RA, Knox KB, Stefanelli M, Godwin M. The Canadian survey of health, lifestyle and ageing with multiple sclerosis: methodology and initial results. BMJ Open 2014; 4:e005718. [PMID: 25011993 PMCID: PMC4120418 DOI: 10.1136/bmjopen-2014-005718] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE People with multiple sclerosis (MS) are living longer so strategies to enhance long-term health are garnering more interest. We aimed to create a profile of ageing with MS in Canada by recruiting 1250 (5% of the Canadian population above 55 years with MS) participants and focusing data collection on health and lifestyle factors, disability, participation and quality of life to determine factors associated with healthy ageing. DESIGN National multicentre postal survey. SETTING Recruitment from Canadian MS clinics, MS Society of Canada chapters and newspaper advertisements. PARTICIPANTS People aged 55 years or older with MS symptoms more than 20 years. OUTCOME MEASURES Validated outcome measures and custom-designed questions examining MS disease characteristics, living situation, disability, comorbid conditions, fatigue, health behaviours, mental health, social support, impact of MS and others. RESULTS Of the 921 surveys, 743 were returned (80.7% response rate). Participants (mean age 64.6±6.2 years) reported living with MS symptoms for an average of 32.9±9.5 years and 28.6% were either wheelchair users or bedridden. There was only 5.4% missing data and 709 respondents provided optional qualitative information. According to data derived from the 2012 Canadian Community Health Survey of Canadians above 55 years of age, older people with MS from this survey sample are about eight times less likely to be employed full-time. Older people with MS were less likely to engage in regular physical activity (26.7%) compared with typical older Canadians (45.2%). However, they were more likely to abstain from alcohol and smoking. CONCLUSIONS Despite barriers to participation, we were able to recruit and gather detailed responses (with good data quality) from a large proportion of older Canadians with MS. The data suggest that this sample of older people with MS is less likely to be employed, are less active and more disabled than other older Canadians.
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Affiliation(s)
- Michelle Ploughman
- Recovery and Performance Laboratory, Rehabilitation Research Unit, Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
| | - Serge Beaulieu
- Eastern Health Authority, St. John's, Newfoundland, Canada
| | - Chelsea Harris
- Recovery and Performance Laboratory, Rehabilitation Research Unit, Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
| | - Stephen Hogan
- Recovery and Performance Laboratory, Rehabilitation Research Unit, Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
| | - Olivia J Manning
- Recovery and Performance Laboratory, Rehabilitation Research Unit, Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
| | - Penelope W Alderdice
- Recovery and Performance Laboratory, Rehabilitation Research Unit, Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
| | - John D Fisk
- Department of Psychiatry, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
| | - A Dessa Sadovnick
- Department of Medical Genetics and Division of Neurology, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Paul O'Connor
- Department of Neurology, St. Michaels Regional Hospital, Toronto, Ontario, Canada
| | | | - Luanne M Metz
- Department of Neurology, University of Alberta, Edmonton, Alberta, Canada
| | - Penelope Smyth
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Nancy Mayo
- Department of Clinical Epidemiology, McGill University, Montreal, Quebec, Canada
| | - Ruth Ann Marrie
- Departments of Internal Medicine and Community Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Katherine B Knox
- Department of Physical Medicine and Rehabilitation, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Mark Stefanelli
- Department of Neurology, Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
| | - Marshall Godwin
- Primary Health Care Research Unit, Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
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Manouchehrinia A, Tench CR, Maxted J, Bibani RH, Britton J, Constantinescu CS. Tobacco smoking and disability progression in multiple sclerosis: United Kingdom cohort study. ACTA ACUST UNITED AC 2013; 136:2298-304. [PMID: 23757766 PMCID: PMC3692034 DOI: 10.1093/brain/awt139] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Tobacco smoking has been linked to an increased risk of multiple sclerosis. However, to date, results from the few studies on the impact of smoking on the progression of disability are conflicting. The aim of this study was to investigate the effects of smoking on disability progression and disease severity in a cohort of patients with clinically definite multiple sclerosis. We analysed data from 895 patients (270 male, 625 female), mean age 49 years with mean disease duration 17 years. Forty-nine per cent of the patients were regular smokers at the time of disease onset or at diagnosis (ever-smokers). Average disease severity as measured by multiple sclerosis severity score was greater in ever-smokers, by 0.68 (95% confidence interval: 0.36-1.01). The risk of reaching Expanded Disability Status Scale score milestones of 4 and 6 in ever-smokers compared to never-smokers was 1.34 (95% confidence interval: 1.12-1.60) and 1.25 (95% confidence interval: 1.02-1.51) respectively. Current smokers showed 1.64 (95% confidence interval: 1.33-2.02) and 1.49 (95% confidence interval: 1.18-1.86) times higher risk of reaching Expanded Disability Status Scale scores 4 and 6 compared with non-smokers. Ex-smokers who stopped smoking either before or after the onset of the disease had a significantly lower risk of reaching Expanded Disability Status Scale scores 4 (hazard ratio: 0.65, confidence interval: 0.50-0.83) and 6 (hazard ratio: 0.69, confidence interval: 0.53-0.90) than current smokers, and there was no significant difference between ex-smokers and non-smokers in terms of time to Expanded Disability Status Scale scores 4 or 6. Our data suggest that regular smoking is associated with more severe disease and faster disability progression. In addition, smoking cessation, whether before or after onset of the disease, is associated with a slower progression of disability.
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Affiliation(s)
- Ali Manouchehrinia
- Academic Division of Clinical Neurology, University of Nottingham, Queen's Medical Centre, Nottingham, NG7 2UH, UK
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Environmental risk factors for multiple sclerosis: a review with a focus on molecular mechanisms. Int J Mol Sci 2012; 13:11718-11752. [PMID: 23109880 PMCID: PMC3472772 DOI: 10.3390/ijms130911718] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 08/31/2012] [Accepted: 09/06/2012] [Indexed: 12/15/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic disabling disease of the central nervous system commonly affecting young adults. Pathologically, there are patches of inflammation (plaques) with demyelination of axons and oligodendrocyte loss. There is a global latitude gradient in MS prevalence, and incidence of MS is increasing (particularly in females). These changes suggest a major role for environmental factors in causation of disease. We have reviewed the evidence and potential mechanisms of action for three exposures: vitamin D, Epstein Barr virus and cigarette smoking. Recent advances supporting gene-environment interactions are reviewed. Further research is needed to establish mechanisms of causality in humans and to explore preventative strategies.
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