Searching the LILACS database for Portuguese- and Spanish-language randomized trials in physiotherapy was difficult

Freitas, André Everton de; Herbert, Robert D.; Latimer, Jane; Ferreira, Paulo H.

doi:10.1016/j.jclinepi.2004.06.014

Cited by 9 publications

(10 citation statements)

References 10 publications

(10 reference statements)

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“…Another important aspect that results in the exclusion of the literature published in languages other than English is emphasized by Freitas and collaborators [15]. The authors show that most of the clinical essays published in English show statistically significant results, while less than half of the studies published in other languages present positive results.…”

Section: Discussionmentioning

confidence: 99%

Public health and epidemiology journals published in Brazil and other Portuguese speaking countries

Barreto

Barata

2008

Emerg Themes Epidemiol

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It is well known that papers written in languages other than English have a great risk of being ignored simply because these languages are not accessible to the international scientific community. The objective of this paper is to facilitate the access to the public health and epidemiology literature available in Portuguese speaking countries. It was found that it is particularly concentrated in Brazil, with some few examples in Portugal and none in other Portuguese speaking countries. This literature is predominantly written in Portuguese, but also in other languages such as English or Spanish. The paper describes the several journals, as well as the bibliographic databases that index these journals and how to access them. Most journals provide open-access with direct links in the indexing databases. The importance of this scientific production for the development of epidemiology as a scientific discipline and as a basic discipline for public health practice is discussed. To marginalize these publications has implications for a more balanced knowledge and understanding of the health problems and their determinants at a world-wide level.

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Section: Discussionmentioning

confidence: 99%

Public health and epidemiology journals published in Brazil and other Portuguese speaking countries

Barreto

Barata

2008

Emerg Themes Epidemiol

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“…Manríquez12 conducted a study in the field of dermatology and found that there were unpublished studies in LILACS not recoverable in other databases. Freitas13 however, found that for the physical therapy area, had a very small number of RCT, with moderate to high quality published in Spanish or Portuguese, but were difficult to located.…”

Section: Methodsmentioning

confidence: 99%

Validity of Qualis database as a predictor of evidence hierarchy and risk of bias in randomized controlled trials - a case study in dentistry

Ferreira

Loureiro

Saconato

et al. 2011

Clinics

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OBJECTIVE:To evaluate the validity of the Qualis database in identifying the levels of scientific evidence and the quality of randomized controlled trials indexed in the Lilacs database.METHODS:We selected 40 open‐access journals and performed a page‐by‐page hand search, to identify published articles according to the type of study during a period of six years. Classification of studies was performed by independent reviewers assessed for their reliability. Randomized controlled trials were identified for separate evaluation of risk of bias using four dimensions: generation of allocation sequence, allocation concealment, blinding, and incomplete outcome data. The Qualis classification was considered to be the outcome variable. The statistical tests used included Kappa, Spearman's correlation, Kendall‐tau and ordinal regressions.RESULTS:Studies with low levels of scientific evidence received similar Qualis classifications when compared to studies with high levels of evidence. In addition, randomized controlled trials with a high risk of bias for the generation of allocation sequences and allocation concealment were more likely to be published in journals with higher Qualis levels.DISCUSSION:The hierarchy level of the scientific evidence as classified by type of research design, as well as by the validity of studies according to the bias control level, was not correlated or associated with Qualis stratification.CONCLUSION:Qualis classifications for journals are not an approximate or indirect predictor of the validity of randomized controlled trials published in these journals and are therefore not a legitimate or appropriate indicator of the validity of randomized controlled trials.

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“…The authors report that only 47 out of 5,262 articles retrieved were RCT, and sensitivity ranged from 2,0% to 53,0% (FREITAS et al, 2005). The strategy with the worst performance (2,0%) included only indexing terms.…”

Section: Indexing Of Clinical Trials In Lilacsmentioning

confidence: 99%

“…Although there are several studies on the quality of indexing of other databases (DICKERSIN et al, 2002;GLANVILLE et al, 2006;LEFEBVRE et al, 2008;TALJAARD et al, 2010;WIELAND et al, 2012), there are few studies that evaluate the indexing of CT as a PT in LILACS (CASTRO et al 1997;FREITAS et al, 2005;MORENO FERNANDEZ et al, 2013). Therefore, the objective of this study was to evaluate the adequacy of indexing of CT We excluded journals whose sites were unavailable, with restricted access or whose indexing was in process during the study period.…”

Section: Introductionmentioning

confidence: 99%

Indexing of clinical trials in LILACS: Assessment of 721 articles published in cardiology journals

et al. 2017

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Systematic reviews are considered the highest level of evidence for decision making in health care issues. One of the first steps of a SR involves identifying all relevant clinical trials on the topic of interest. However, the retrieval of clinical trials in a database partially depends on the article indexing quality. The aim of this article is to evaluate the adequacy of indexing of clinical trials as a publication type in the LILACS database in a sample of articles published in cardiology journals. This cross-sectional study analyzed the indexing quality of clinical trials published between 2008 and 2009 in cardiology journals indexed in LILACS. Two independent reviewers identified and reclassified all original studies published in these journals as being clinical trials or other types of studies. The result of their classification was compared with the indexing publication type produced by LILACS. A total of 721 articles published in 11 cardiology journals were included. The reviewers classified 63 articles as clinical trials; 44 of these were correctly indexed in LILACS, while 19 were indexed as other types of studies (false negatives). The reviewers classified 658 articles as non-clinical trials; 651 were correctly indexed and 7 were incorrectly indexed in LILACS as being clinical trials (false positives). The sensitivity, specificity and global accuracy of LILACS indexing were 69.8%, 98.9% and 96.4% (695/721), respectively. Almost one third of the clinical trials published in LILACS-indexed Cardiology journals are not adequately indexed. The indexing quality of the studies published in these journals must be improved.Keywords: Indexing as topic. Bibliographic databases. Clinical trials as topic. Quality control. Periodicals as topic. Resumo As revisões sistemáticas são consideradas o mais alto nível de evidência para a tomada de decisão em questões de cuidados de saúde. Um dos primeiros passos de uma RS envolve a identificação de todos ensaios clínicos relevantes sobre o tema de interesse. Porém, a recuperação de ensaios clínicos em uma base de dados, depende em parte da qualidade da indexação. O objetivo deste artigo é avaliar a adequação da indexação dos ensaios clínicos como tipo de publicação na base de dados LILACS, em uma amostra de artigos publicados em periódicos de cardiologia. Estudo transversal de análise da indexação dos ensaios clínicos publicados entre 2008-2009 em periódicos de cardiologia na LILACS. Duas revisoras identificaram e reclassificaram, de forma independente, todos os

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Searching the LILACS database for Portuguese- and Spanish-language randomized trials in physiotherapy was difficult

Cited by 9 publications

References 10 publications

Public health and epidemiology journals published in Brazil and other Portuguese speaking countries

Public health and epidemiology journals published in Brazil and other Portuguese speaking countries

Validity of Qualis database as a predictor of evidence hierarchy and risk of bias in randomized controlled trials - a case study in dentistry

Indexing of clinical trials in LILACS: Assessment of 721 articles published in cardiology journals

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