biostudies-literatureUnknown13(4)Christoffersen LA<h4>Objectives</h4>To examine the level of loneliness experienced during the COVID-19 pandemic in Denmark and to identify associated behavioural patterns and demographic factors.<h4>Design</h4>Cross-sectional cohort study.<h4>Setting</h4>Includes Danish active and former blood donors.<h4>Participants</h4>A questionnaire was sent to 124 307 active and former blood donors, of these a total of 50 968 participants completed the study questionnaire (response rate=41%).<h4>Primary and secondary outcome measures</h4>Subjective experience of loneliness was measured using the 3-item University of California, Los Angeles Loneliness Scale (UCLA-3). Besides the UCLA-3, the respondents answered items on sociodemographic and economic characteristics, items on precautionary measures taken to avoid COVID-BMJ opene064033https://www.ebi.ac.uk/biostudies/studies/S-EPMC10151242biostudies-literatureExperience of loneliness during the COVID-19 pandemic: a cross-sectional study of 50 968 adult Danes.PMC10151242Erikstrup CNissen JKaspersen KASchwinn MHjalgrim HOstrowski SRDinh KMChristoffersen LASækmose SHansen TFBruun MTWerge TPedersen OBHelenius DDidriksen MBanasik KNielsen KfalseExperience of loneliness during the COVID-19 pandemic: a cross-sectional study of 50 968 adult Danes.<h4>Objectives</h4>To examine the level of loneliness experienced during the COVID-19 pandemic in Denmark and to identify associated behavioural patterns and demographic factors.<h4>Design</h4>Cross-sectional cohort study.<h4>Setting</h4>Includes Danish active and former blood donors.<h4>Participants</h4>A questionnaire was sent to 124 307 active and former blood donors, of these a total of 50 968 participants completed the study questionnaire (response rate=41%).<h4>Primary and secondary outcome measures</h4>Subjective experience of loneliness was measured using the 3-item University of California, Los Angeles Loneliness Scale (UCLA-3). Besides the UCLA-3, the respondents answered items on sociodemographic and economic characteristics, items on precautionary measures taken to avoid COVID-2023-01-01T00:00:00Z2023 Apr2025-04-21T22:42:03.618Z2025-04-05T18:54:23.762ZS-EPMC101512423718563610.1136/bmjopen-2022-064033