{"doi":"10.1007/bf03014317","title":"Quality and retrieval of obstetrical anaesthesia randomized controlled trials","abstract":null,"journal":"Canadian Journal of Anaesthesia","year":1997,"id":681032,"datarank":0.4943755299006494,"base_score":3.295836866004329,"endowment":3.295836866004329,"self_citation_contribution":0.4943755299006494,"citation_network_contribution":0.0,"self_endowment_contribution":0.4943755299006494,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":26,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1779331,"name":"Stephen H. Halpern","orcid":null,"position":1,"is_corresponding":false},{"id":1779333,"name":"Molly Thangaroopan","orcid":null,"position":2,"is_corresponding":false},{"id":250027,"name":"Alejandro R. Jadad","orcid":"0000-0002-9591-5099","position":3,"is_corresponding":false},{"id":1779334,"name":"Arne Ohlsson","orcid":null,"position":4,"is_corresponding":false},{"id":1779330,"name":"Jennifer S. Bender","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Quality and retrieval of obstetrical anaesthesia randomized controlled trials","abstract":"<h4>Purpose</h4>Randomized controlled trials (RCTs) are suitable for meta-analysis and systematic reviews provided they are of high quality and are easy to retrieve. We determined these attributes of RCTs in obstetrical anaesthesia in a sample of available journals that are indexed in MEDLINE.<h4>Source</h4>Randomized controlled trials published between January 1985 and December 1994 in seven anaesthetic and three obstetric journals were identified by a MEDLINE search, and by handsearch of the same journals. Each RCT was assigned a quality score by a blinded rater using a reliable and validated scaled. The quality of each RCT was described and compared over time and by journal. The comparative yield of MEDLINE and hand-search was evaluated.<h4>Principal findings</h4>Three hundred and forty RCTs were retrieved by MEDLINE and handsearch. Two hundred and twenty seven (65%) were identified by the MEDLINE search and 333 by the handsearch (98%). The median quality score was 3/5. There was no difference in score over time. Anesthesiology had the highest median score, Anaesthesia had the lowest (P < 0.05).<h4>Conclusions</h4>Care must be taken when reviewing obstetrical anaesthesia research. Strategies in addition to a MEDLINE search must be used to identify RCTs since more than one third were missed using MEDLINE alone. Poor quality RCTs are more likely to be biased in favour of a new treatment. Therefore, to increase the validity of reviews sensitivity analyses based on quality should be done.","is_dataset_classified":null,"base_score":3.295836866004329,"endowment":3.295836866004329,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"8988818","pmcid":null,"openalex_id":"https://openalex.org/W1964377387","authors":[],"funders":[],"total_grants":0,"fwci":2.3233,"citation_percentile":0.88952381,"influential_citations":0,"citation_trend":[{"year":2012,"count":1},{"year":2017,"count":1}],"oa_status":"bronze","license":"http://www.springer.com/tdm","oa_locations":[{"url":"https://link.springer.com/content/pdf/10.1007/BF03014317.pdf","host_type":"journal"},{"url":"https://link.springer.com/content/pdf/10.1007/BF03014317.pdf","host_type":"publisher"},{"url":"http://link.springer.com/content/pdf/10.1007/BF03014317.pdf","host_type":"publisher"},{"url":"http://link.springer.com/article/10.1007/BF03014317/fulltext.html","host_type":"publisher"},{"url":"http://link.springer.com/content/pdf/10.1007/BF03014317","host_type":"publisher"},{"url":"https://doi.org/10.1007/bf03014317","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/8988818","host_type":"repository"}],"fields_of_study":["Meta-analysis and systematic reviews","Delphi Technique in Research","Academic Publishing and Open Access","Anesthesia, Obstetrical","Anesthesiology","Bias","Female","Humans","Information Storage and Retrieval","MEDLINE","Periodicals as Topic","Pregnancy","Randomized Controlled Trials as Topic","Reproducibility of Results","Research Design","Sensitivity and Specificity","Single-Blind Method"],"mesh_terms":["Anesthesia, Obstetrical","Anesthesiology","Female","Humans","Periodicals as Topic","Pregnancy","Research Design","Sensitivity and Specificity","Reproducibility of Results","Bias","Randomized Controlled Trials as Topic","Single-Blind Method","MEDLINE","Information Storage and Retrieval"],"keywords":["MEDLINE","Randomized controlled trial","Medicine","Surgery"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"No poverty"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-17T16:46:30.116999Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}