Persistence with Statins and Onset of Rheumatoid Arthritis: A Population-Based Cohort Study
- Publication Date
- September 07, 2010
- Journal
- PLOS Medicine
- Authors
- Gabriel Chodick, Howard Amital, Yoav Shalem, Ehud Kokia, et al
- Volume
- 7
- Issue
- 9
- Pages
- e1000336
- DOI
- https://dx.plos.org/10.1371/journal.pmed.1000336
- Publisher URL
- http://journals.plos.org/plosmedicine/article?id=10.1371%2Fjournal.pmed.1000336
- PubMed
- http://www.ncbi.nlm.nih.gov/pubmed/20838658
- PubMed Central
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2935457
- Europe PMC
- http://europepmc.org/abstract/MED/20838658
- Web of Science
- 000282276900016
- Scopus
- 77957881420
- Mendeley
- http://www.mendeley.com/research/persistence-statins-onset-rheumatoid-arthritis-populationbased-cohort-study-1
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Mendeley | Further Information
{"title"=>"Persistence with statins and onset of rheumatoid arthritis: A population-based cohort study", "type"=>"journal", "authors"=>[{"first_name"=>"Gabriel", "last_name"=>"Chodick", "scopus_author_id"=>"6601913252"}, {"first_name"=>"Howard", "last_name"=>"Amital", "scopus_author_id"=>"55400356400"}, {"first_name"=>"Yoav", "last_name"=>"Shalem", "scopus_author_id"=>"57194849405"}, {"first_name"=>"Ehud", "last_name"=>"Kokia", "scopus_author_id"=>"16161969900"}, {"first_name"=>"Anthony D.", "last_name"=>"Heymann", "scopus_author_id"=>"55813186100"}, {"first_name"=>"Avi", "last_name"=>"Porath", "scopus_author_id"=>"7005297233"}, {"first_name"=>"Varda", "last_name"=>"Shalev", "scopus_author_id"=>"6506833159"}], "year"=>2010, "source"=>"PLoS Medicine", "identifiers"=>{"pui"=>"359754404", "sgr"=>"77957881420", "issn"=>"15491277", "pmid"=>"20838658", "scopus"=>"2-s2.0-77957881420", "doi"=>"10.1371/journal.pmed.1000336", "isbn"=>"1549-1676 (Electronic) 1549-1277 (Linking)"}, "id"=>"416b6c1b-472c-3a3f-898c-fdb1505b6333", "abstract"=>"BACKGROUND: The beneficial effects of statins in rheumatoid arthritis (RA) have been suggested previously, but it is unclear whether statins may prevent its development. The aim of this retrospective cohort study was to explore whether persistent use of statins is associated with onset of RA. METHODS AND FINDINGS: The computerized medical databases of a large health organization in Israel were used to identify diagnosed RA cases among adults who began statin therapy between 1998 and 2007. Persistence with statins was assessed by calculating the mean proportion of follow-up days covered (PDC) with statins for every study participant. To assess the possible effects of healthy user bias, we also examined the risk of osteoarthritis (OA), a common degenerative joint disease that is unlikely to be affected by use of statins. A total of 211,627 and 193,770 individuals were eligible for the RA and OA cohort analyses, respectively. During the study follow-up period, there were 2,578 incident RA cases (3.07 per 1,000 person-years) and 17,878 incident OA cases (24.34 per 1,000 person-years). The crude incidence density rate of RA among nonpersistent patients (PDC level of <20%) was 51% higher (3.89 per 1,000 person-years) compared to highly persistent patients who were covered with statins for at least 80% of the follow-up period. After adjustment for potential confounders, highly persistent patients had a hazard ratio of 0.58 (95% confidence interval 0.52-0.65) for RA compared with nonpersistent patients. Larger differences were observed in younger patients and in patients initiating treatment with high efficacy statins. In the OA cohort analysis, high persistence with statins was associated only with a modest decrement in risk ratio (hazard ratio = 0.85; 0.81-0.88) compared to nonadherent patients. CONCLUSIONS: The present study demonstrates an association between persistence with statin therapy and reduced risk of developing RA. The relationship between continuation of statin use and OA onset was weak and limited to patients with short-term follow-up.", "link"=>"http://www.mendeley.com/research/persistence-statins-onset-rheumatoid-arthritis-populationbased-cohort-study-1", "reader_count"=>25, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>2, "Librarian"=>1, "Student > Doctoral Student"=>4, "Researcher"=>5, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>2, "Student > Master"=>3, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>2, "Librarian"=>1, "Student > Doctoral Student"=>4, "Researcher"=>5, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>2, "Student > Master"=>3, "Professor"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>1, "Unspecified"=>4, "Environmental Science"=>1, "Biochemistry, Genetics and Molecular Biology"=>1, "Medicine and Dentistry"=>12, "Agricultural and Biological Sciences"=>4, "Psychology"=>1, "Immunology and Microbiology"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>1}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>12}, "Psychology"=>{"Psychology"=>1}, "Immunology and Microbiology"=>{"Immunology and Microbiology"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>4}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>4}, "Environmental Science"=>{"Environmental Science"=>1}}, "reader_count_by_country"=>{"United States"=>1, "United Kingdom"=>1, "Germany"=>1, "India"=>2}, "group_count"=>3}CrossRef
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Scopus | Further Information
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Journal Comments | Further Information
- {"type"=>"COMMENT", "annotationUri"=>"info:doi/10.1371/annotation/6032078b-d5ea-4c78-bc0e-e3650caaef95", "title"=>"Publisher's Note: Repetition of ‘result in’", "body"=>"Delete result in", "highlightedText"=>"''result in''\nhttp://plosmedicine.org/article/info:doi/10.1371/journal.pmed.1000336#article1.body1.sec4.p11", "isRemoved"=>false, "created"=>"2010-09-08T09:34:25Z", "lastModified"=>"2010-09-08T09:34:25Z", "creator"=>{"userId"=>"146765"}, "competingInterestStatement"=>{"creatorWasPrompted"=>true, "hasCompetingInterests"=>false}, "parentArticle"=>{"doi"=>"info:doi/10.1371/journal.pmed.1000336", "state"=>"published", "journals"=>{"PLoSMedicine"=>{"journalKey"=>"PLoSMedicine", "eIssn"=>"1549-1676", "title"=>"PLOS Medicine"}}}, "replyTreeSize"=>0, "mostRecentActivity"=>"2010-09-08T09:34:25Z", "replies"=>[]}
- {"type"=>"COMMENT", "annotationUri"=>"info:doi/10.1371/annotation/b5b58837-f33e-449f-b865-4b69b67309c3", "title"=>"Risk of bias", "body"=>"Recent data from a new study by Warren et al (DOI: 10.1002/pds.3526) may indicate two important sources of bias in this study. Warren and colleagues identify two lifestyle variables that have associations with adherence to statin treatment; smoking and alcohol use. Smoking is associated with poor adherence to statin treatment (HR:0.93). Since smoking is a key lifestyle trigger for RA, not adjusting for it is a source of bias that would make persistence with statin use look protective against RA. In addition alcohol consumption in the same study is associated with better adherence to statin treatment (HR 1.07 and 1.08 for 14-21 drinks and more than 21 drinks per week) and also associated with a lower risk of rheumatoid arthritis, hence another source of bias that would potentially inflate the protective effect of persistence with statin use. Unfortunately Chodick and colleagues did not make adjustments for these two lifestyle variables.", "isRemoved"=>false, "created"=>"2013-12-10T01:06:54Z", "lastModified"=>"2013-12-10T01:06:54Z", "creator"=>{"userId"=>"389505"}, "highlightedText"=>"", "competingInterestStatement"=>{"creatorWasPrompted"=>true, "hasCompetingInterests"=>false}, "parentArticle"=>{"doi"=>"info:doi/10.1371/journal.pmed.1000336", "state"=>"published", "journals"=>{"PLoSMedicine"=>{"journalKey"=>"PLoSMedicine", "eIssn"=>"1549-1676", "title"=>"PLOS Medicine"}}}, "replyTreeSize"=>0, "mostRecentActivity"=>"2013-12-10T01:06:54Z", "replies"=>[]}
- {"type"=>"COMMENT", "annotationUri"=>"info:doi/10.1371/annotation/2160f4ea-ce47-444d-ab04-97aa54e2ff62", "title"=>"confounding, not bias", "body"=>"Sorry for the confusion, i meant confounding in the previous comment; not bias.", "isRemoved"=>false, "created"=>"2013-12-10T15:37:22Z", "lastModified"=>"2013-12-10T15:37:22Z", "creator"=>{"userId"=>"389505"}, "highlightedText"=>"", "competingInterestStatement"=>{"creatorWasPrompted"=>true, "hasCompetingInterests"=>false}, "parentArticle"=>{"doi"=>"info:doi/10.1371/journal.pmed.1000336", "state"=>"published", "journals"=>{"PLoSMedicine"=>{"journalKey"=>"PLoSMedicine", "eIssn"=>"1549-1676", "title"=>"PLOS Medicine"}}}, "replyTreeSize"=>0, "mostRecentActivity"=>"2013-12-10T15:37:22Z", "replies"=>[]}
- {"type"=>"COMMENT", "annotationUri"=>"info:doi/10.1371/annotation/bc5969ae-a491-4c58-aab3-4f31e66034a8", "title"=>"Author's reply - Risk of bias", "body"=>"We thank the author for his/her comment. Smoking is indeed a potential confounder in this study. As the author points out, a recently published study has shown that adherent statins users are approximately 10% less likely to be smokers (1). However, a sensitivity analysis assuming that smoking is associated with a relative risk of 2.6 for rheumatoid arthritis (RA) (2) and that the relevant age-specific prevalence of smoking in Israel is approximately 11% (3), indicate that our study results would change only mildly after adjusting for smoking. For example, the hazard ratio for RA calculated for patients with proportion of days covered with statins of 80% or more would change from 0.69 (95% confidence interval: 0.57-0.83) to 0.71 (95%CI: 0.59-0.86). The results of the recent study do not suggest that alcohol consumption is related with adherence with statins. \n \n\nReferences\n1.\tWarren JR, Falster MO, Fox D, Jorm L. Factors influencing adherence in long-term use of statins. Pharmacoepidemiol Drug Saf. 2013 Dec;22(12):1298-307.\n2.\tHeliövaara M, Aho K, Aromaa A, Knekt P, Reunanen A. Smoking and risk of rheumatoid arthritis. The Journal of Rheumatology [1993, 20(11):1830-1835] \n3.\tIsrael Ministry of Health, Smoking Status in Israel 2012, http://www.health.gov.il/PublicationsFiles/smoking-2012.pdf. \n", "isRemoved"=>false, "created"=>"2013-12-13T15:47:16Z", "lastModified"=>"2013-12-13T15:47:16Z", "creator"=>{"userId"=>"390657"}, "highlightedText"=>"", "competingInterestStatement"=>{"creatorWasPrompted"=>true, "hasCompetingInterests"=>false}, "parentArticle"=>{"doi"=>"info:doi/10.1371/journal.pmed.1000336", "state"=>"published", "journals"=>{"PLoSMedicine"=>{"journalKey"=>"PLoSMedicine", "eIssn"=>"1549-1676", "title"=>"PLOS Medicine"}}}, "replyTreeSize"=>0, "mostRecentActivity"=>"2013-12-13T15:47:16Z", "replies"=>[]}
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- {"month"=>"3", "year"=>"2015", "pdf_views"=>"8", "xml_views"=>"0", "html_views"=>"39"}
- {"month"=>"4", "year"=>"2015", "pdf_views"=>"6", "xml_views"=>"0", "html_views"=>"39"}
- {"month"=>"5", "year"=>"2015", "pdf_views"=>"6", "xml_views"=>"1", "html_views"=>"46"}
- {"month"=>"6", "year"=>"2015", "pdf_views"=>"14", "xml_views"=>"0", "html_views"=>"51"}
- {"month"=>"7", "year"=>"2015", "pdf_views"=>"1", "xml_views"=>"0", "html_views"=>"75"}
- {"month"=>"8", "year"=>"2015", "pdf_views"=>"2", "xml_views"=>"1", "html_views"=>"30"}
- {"month"=>"9", "year"=>"2015", "pdf_views"=>"3", "xml_views"=>"0", "html_views"=>"41"}
- {"month"=>"10", "year"=>"2015", "pdf_views"=>"6", "xml_views"=>"0", "html_views"=>"26"}
- {"month"=>"11", "year"=>"2015", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"40"}
- {"month"=>"12", "year"=>"2015", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"27"}
- {"month"=>"1", "year"=>"2016", "pdf_views"=>"1", "xml_views"=>"0", "html_views"=>"33"}
- {"month"=>"2", "year"=>"2016", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"17"}
- {"month"=>"3", "year"=>"2016", "pdf_views"=>"1", "xml_views"=>"0", "html_views"=>"39"}
- {"month"=>"4", "year"=>"2016", "pdf_views"=>"11", "xml_views"=>"0", "html_views"=>"58"}
- {"month"=>"5", "year"=>"2016", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"61"}
- {"month"=>"6", "year"=>"2016", "pdf_views"=>"8", "xml_views"=>"0", "html_views"=>"50"}
- {"month"=>"7", "year"=>"2016", "pdf_views"=>"3", "xml_views"=>"0", "html_views"=>"39"}
- {"month"=>"8", "year"=>"2016", "pdf_views"=>"4", "xml_views"=>"0", "html_views"=>"36"}
- {"month"=>"9", "year"=>"2016", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"41"}
- {"month"=>"10", "year"=>"2016", "pdf_views"=>"6", "xml_views"=>"0", "html_views"=>"23"}
- {"month"=>"11", "year"=>"2016", "pdf_views"=>"1", "xml_views"=>"0", "html_views"=>"26"}
- {"month"=>"12", "year"=>"2016", "pdf_views"=>"5", "xml_views"=>"0", "html_views"=>"32"}
- {"month"=>"1", "year"=>"2017", "pdf_views"=>"9", "xml_views"=>"1", "html_views"=>"42"}
- {"month"=>"2", "year"=>"2017", "pdf_views"=>"7", "xml_views"=>"1", "html_views"=>"55"}
- {"month"=>"3", "year"=>"2017", "pdf_views"=>"5", "xml_views"=>"0", "html_views"=>"37"}
- {"month"=>"4", "year"=>"2017", "pdf_views"=>"5", "xml_views"=>"0", "html_views"=>"59"}
- {"month"=>"5", "year"=>"2017", "pdf_views"=>"6", "xml_views"=>"1", "html_views"=>"59"}
- {"month"=>"6", "year"=>"2017", "pdf_views"=>"5", "xml_views"=>"0", "html_views"=>"41"}
- {"month"=>"7", "year"=>"2017", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"41"}
- {"month"=>"8", "year"=>"2017", "pdf_views"=>"7", "xml_views"=>"3", "html_views"=>"44"}
- {"month"=>"9", "year"=>"2017", "pdf_views"=>"4", "xml_views"=>"2", "html_views"=>"48"}
- {"month"=>"10", "year"=>"2017", "pdf_views"=>"6", "xml_views"=>"2", "html_views"=>"50"}
- {"month"=>"11", "year"=>"2017", "pdf_views"=>"4", "xml_views"=>"1", "html_views"=>"41"}
- {"month"=>"12", "year"=>"2017", "pdf_views"=>"2", "xml_views"=>"0", "html_views"=>"45"}
- {"month"=>"1", "year"=>"2018", "pdf_views"=>"4", "xml_views"=>"0", "html_views"=>"20"}
- {"month"=>"2", "year"=>"2018", "pdf_views"=>"3", "xml_views"=>"0", "html_views"=>"18"}
- {"month"=>"3", "year"=>"2018", "pdf_views"=>"6", "xml_views"=>"0", "html_views"=>"11"}
- {"month"=>"4", "year"=>"2018", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"21"}
- {"month"=>"5", "year"=>"2018", "pdf_views"=>"3", "xml_views"=>"0", "html_views"=>"21"}
- {"month"=>"6", "year"=>"2018", "pdf_views"=>"7", "xml_views"=>"4", "html_views"=>"17"}
- {"month"=>"7", "year"=>"2018", "pdf_views"=>"3", "xml_views"=>"4", "html_views"=>"13"}
- {"month"=>"8", "year"=>"2018", "pdf_views"=>"3", "xml_views"=>"2", "html_views"=>"16"}
- {"month"=>"9", "year"=>"2018", "pdf_views"=>"6", "xml_views"=>"1", "html_views"=>"11"}
- {"month"=>"10", "year"=>"2018", "pdf_views"=>"12", "xml_views"=>"0", "html_views"=>"11"}
- {"month"=>"11", "year"=>"2018", "pdf_views"=>"2", "xml_views"=>"0", "html_views"=>"7"}
- {"month"=>"12", "year"=>"2018", "pdf_views"=>"2", "xml_views"=>"1", "html_views"=>"13"}
- {"month"=>"1", "year"=>"2019", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"24"}
- {"month"=>"2", "year"=>"2019", "pdf_views"=>"5", "xml_views"=>"0", "html_views"=>"23"}
- {"month"=>"3", "year"=>"2019", "pdf_views"=>"7", "xml_views"=>"1", "html_views"=>"18"}
- {"month"=>"4", "year"=>"2019", "pdf_views"=>"3", "xml_views"=>"0", "html_views"=>"12"}
- {"month"=>"5", "year"=>"2019", "pdf_views"=>"8", "xml_views"=>"0", "html_views"=>"25"}
- {"month"=>"6", "year"=>"2019", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"7"}
- {"month"=>"7", "year"=>"2019", "pdf_views"=>"5", "xml_views"=>"0", "html_views"=>"11"}
- {"month"=>"8", "year"=>"2019", "pdf_views"=>"3", "xml_views"=>"0", "html_views"=>"9"}
- {"month"=>"9", "year"=>"2019", "pdf_views"=>"3", "xml_views"=>"0", "html_views"=>"9"}
- {"month"=>"10", "year"=>"2019", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"7"}
- {"month"=>"11", "year"=>"2019", "pdf_views"=>"2", "xml_views"=>"0", "html_views"=>"11"}
- {"month"=>"12", "year"=>"2019", "pdf_views"=>"6", "xml_views"=>"0", "html_views"=>"5"}
- {"month"=>"1", "year"=>"2020", "pdf_views"=>"11", "xml_views"=>"1", "html_views"=>"10"}
- {"month"=>"2", "year"=>"2020", "pdf_views"=>"12", "xml_views"=>"1", "html_views"=>"7"}
- {"month"=>"3", "year"=>"2020", "pdf_views"=>"11", "xml_views"=>"2", "html_views"=>"8"}
- {"month"=>"4", "year"=>"2020", "pdf_views"=>"11", "xml_views"=>"0", "html_views"=>"9"}
- {"month"=>"5", "year"=>"2020", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"6"}
- {"month"=>"6", "year"=>"2020", "pdf_views"=>"4", "xml_views"=>"0", "html_views"=>"6"}
- {"month"=>"7", "year"=>"2020", "pdf_views"=>"5", "xml_views"=>"3", "html_views"=>"7"}
- {"month"=>"8", "year"=>"2020", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"10"}
- {"month"=>"9", "year"=>"2020", "pdf_views"=>"8", "xml_views"=>"0", "html_views"=>"4"}
- {"month"=>"10", "year"=>"2020", "pdf_views"=>"19", "xml_views"=>"0", "html_views"=>"9"}
- {"month"=>"11", "year"=>"2020", "pdf_views"=>"8", "xml_views"=>"0", "html_views"=>"12"}
- {"month"=>"12", "year"=>"2020", "pdf_views"=>"1", "xml_views"=>"1", "html_views"=>"11"}
- {"month"=>"1", "year"=>"2021", "pdf_views"=>"0", "xml_views"=>"0", "html_views"=>"2"}
PMC Usage Stats | Further Information
- {"unique-ip"=>"20", "full-text"=>"15", "pdf"=>"9", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"7"}
- {"unique-ip"=>"16", "full-text"=>"13", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"8"}
- {"unique-ip"=>"9", "full-text"=>"6", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"9"}
- {"unique-ip"=>"17", "full-text"=>"15", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2014", "month"=>"10"}
- {"unique-ip"=>"16", "full-text"=>"14", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2014", "month"=>"11"}
- {"unique-ip"=>"18", "full-text"=>"16", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"12"}
- {"unique-ip"=>"12", "full-text"=>"11", "pdf"=>"7", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"1"}
- {"unique-ip"=>"13", "full-text"=>"15", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"2"}
- {"unique-ip"=>"9", "full-text"=>"10", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"3"}
- {"unique-ip"=>"8", "full-text"=>"8", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"4"}
- {"unique-ip"=>"17", "full-text"=>"19", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"5"}
- {"unique-ip"=>"14", "full-text"=>"15", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"6"}
- {"unique-ip"=>"13", "full-text"=>"19", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"7"}
- {"unique-ip"=>"15", "full-text"=>"13", "pdf"=>"6", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"8"}
- {"unique-ip"=>"13", "full-text"=>"14", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"9"}
- {"unique-ip"=>"13", "full-text"=>"9", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"10"}
- {"unique-ip"=>"21", "full-text"=>"17", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"2", "year"=>"2015", "month"=>"11"}
- {"unique-ip"=>"13", "full-text"=>"11", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"12"}
- {"unique-ip"=>"17", "full-text"=>"18", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"1"}
- {"unique-ip"=>"15", "full-text"=>"16", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"2"}
- {"unique-ip"=>"20", "full-text"=>"21", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"3"}
- {"unique-ip"=>"17", "full-text"=>"19", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"4"}
- {"unique-ip"=>"9", "full-text"=>"8", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"5"}
- {"unique-ip"=>"8", "full-text"=>"11", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"6"}
- {"unique-ip"=>"4", "full-text"=>"4", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"7"}
- {"unique-ip"=>"11", "full-text"=>"12", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"8"}
- {"unique-ip"=>"12", "full-text"=>"11", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"9"}
- {"unique-ip"=>"7", "full-text"=>"6", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"10"}
- {"unique-ip"=>"4", "full-text"=>"5", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"11"}
- {"unique-ip"=>"7", "full-text"=>"9", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"12"}
- {"unique-ip"=>"11", "full-text"=>"7", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"1"}
- {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"2"}
- {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"3"}
- {"unique-ip"=>"6", "full-text"=>"4", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"4"}
- {"unique-ip"=>"8", "full-text"=>"8", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"5"}
- {"unique-ip"=>"7", "full-text"=>"6", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"6"}
- {"unique-ip"=>"4", "full-text"=>"4", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"7"}
- {"unique-ip"=>"9", "full-text"=>"10", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"8"}
- {"unique-ip"=>"4", "full-text"=>"5", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"9"}
- {"unique-ip"=>"7", "full-text"=>"6", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"10"}
- {"unique-ip"=>"5", "full-text"=>"5", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"11"}
- {"unique-ip"=>"4", "full-text"=>"4", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"12"}
- {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"1"}
- {"unique-ip"=>"13", "full-text"=>"9", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"3"}
- {"unique-ip"=>"25", "full-text"=>"13", "pdf"=>"3", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"1"}
- {"unique-ip"=>"5", "full-text"=>"4", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"5"}
- {"unique-ip"=>"3", "full-text"=>"2", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"4"}
- {"unique-ip"=>"5", "full-text"=>"7", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"6"}
- {"unique-ip"=>"5", "full-text"=>"4", "pdf"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"7"}
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Relative Metric
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