{"doi":"10.5860/choice.27-1232","title":"Designing qualitative research","abstract":"Objectives: This study investigated the relationship between sleep quality during pregnancy and preterm birth.
\\nMethods: This longitudinal study was conducted between August 2018 and May 2019. The participants were 150 pregnant women who had been referred to 7 healthcare centers in the city of Qazvin, Iran and met the inclusion criteria. The Petersburg Sleep Quality Index, the Epworth Sleepiness Scale, and 2 questions about daytime sleep status and a demographic questionnaire were administered at 14-18 weeks and 28-32 weeks of gestation. Data were analyzed using the Mann-Whitney test, the Fisher exact test, and univariate and multivariable logistic regression.
\\nResults: In the present study, poor sleep quality affected 84.7% of the participants at 14-18 weeks and 93.3% at 28-32 weeks of gestation. The final model for preterm birth prediction incorporated age and the Petersburg Sleep Quality Index score in the second and third trimesters. Preterm birth increased by 14% with each unit increase in age. With each unit increase in the Petersburg Sleep Quality Index score in the second and third trimesters, preterm birth increased by 42% and 28%, respectively, but the p-values of these factors were not significant.
\\nConclusions: Although a significant percentage of pregnant women had poor sleep quality, no significant relationship was found between sleep quality during pregnancy and preterm birth.","journal":"Choice Reviews Online","year":1989,"id":1327,"datarank":24.076215747024435,"base_score":9.203517146628057,"endowment":9.203517146628057,"self_citation_contribution":1.3805275719942087,"citation_network_contribution":22.695688175030227,"self_endowment_contribution":1.3805275719942087,"citer_contribution":22.695688175030227,"corpus_percentile":97.6,"corpus_rank":768,"citation_count":9931,"citer_count":200,"citers_with_citation_signal":200,"citers_with_endowment":200,"datacite_reuse_total":0,"is_dataset":false,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"1989-10-01","authors":[{"id":16470,"name":"Gretchen Rossman","orcid":"0000-0003-1224-4494","position":1,"is_corresponding":false},{"id":16471,"name":"Ramezani, Faeze","orcid":null,"position":2,"is_corresponding":false},{"id":16472,"name":"Hajnasiri, Hamideh","orcid":null,"position":3,"is_corresponding":false},{"id":16473,"name":"Moafi, Farnoosh","orcid":null,"position":4,"is_corresponding":false},{"id":16469,"name":"Catherine Marshall","orcid":"0000-0002-9762-7330","position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-03-01T18:20:47.508186Z","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,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}