{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,10]],"date-time":"2026-03-10T16:25:11Z","timestamp":1773159911125,"version":"3.50.1"},"reference-count":36,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,7,29]],"date-time":"2021-07-29T00:00:00Z","timestamp":1627516800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004257","name":"Western Norway Regional Health Authority","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004257","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Psychol."],"abstract":"<jats:p>The traits languidity (tendency to become tired\/sleepy upon losing sleep) and flexibility (ability to sleep and work at odd times) have been implicated in shift work tolerance. However, there is a dearth of knowledge about their temporal stability. The aim of the present study was to explore these traits during a long follow-up (FU) period and identify factors related to potential changes in trait scores over time. In all, 1,652 nurses completed the Circadian Type Inventory-revised (CTI-r), which measures languidity and flexibility, at both 2008\/2009 (baseline, BL) and again in 2016 (FU). The latent scores of these two constructs at BL, in addition to age, sex, childcare responsibility, marital status, night work status, and insomnia status, were regressed on the corresponding latent scores at follow-up using a structural equation modeling (SEM) approach. Stability was found for both languidity (rho = 0.59) and flexibility (rho = 0.58). Both composite scores declined significantly from baseline (20.62 and 12.48) to follow-up (19.96 and 11.77). Languidity at baseline was positively associated with languidity at follow-up (<jats:italic>\u03b2<\/jats:italic> = 0.89, <jats:italic>p<\/jats:italic> &amp;lt; 0.009). Undertaking childcare responsibility between baseline and follow-up was inversely related to languidity at follow-up (<jats:italic>\u03b2<\/jats:italic> = \u22120.09, <jats:italic>p<\/jats:italic> &amp;lt; 0.05). Starting night work was positively related to languidity at follow-up (<jats:italic>\u03b2<\/jats:italic> = 0.06, <jats:italic>p<\/jats:italic> &amp;lt; 0.05). Developing insomnia between baseline and follow-up (<jats:italic>\u03b2<\/jats:italic> = 0.15, <jats:italic>p<\/jats:italic> &amp;lt; 0.05) was positively, whereas remitting from insomnia during the same period was negatively (<jats:italic>\u03b2<\/jats:italic> = \u22120.11, <jats:italic>p<\/jats:italic> &amp;lt; 0.01) associated with languidity at follow-up. Flexibility at baseline was positively associated with flexibility at follow-up (<jats:italic>\u03b2<\/jats:italic> = 0.64, <jats:italic>p<\/jats:italic> &amp;lt; 0.05). Having childcare responsibility at baseline, but not at follow-up was inversely related to flexibility at follow-up (<jats:italic>\u03b2<\/jats:italic> = \u22120.05 <jats:italic>p<\/jats:italic> &amp;lt; 0.05). Becoming cohabitant with a partner between baseline and follow-up (<jats:italic>\u03b2<\/jats:italic> = \u22120.07, <jats:italic>p<\/jats:italic> &amp;lt; 0.05) was negatively associated with flexibility at follow-up. Starting night work between baseline and follow-up (<jats:italic>\u03b2<\/jats:italic> = 0.17, <jats:italic>p<\/jats:italic> &amp;lt; 0.01) and reporting night work at both baseline and follow-up (<jats:italic>\u03b2<\/jats:italic> = 0.18, <jats:italic>p<\/jats:italic> &amp;lt; 0.01) were both positively associated with flexibility at follow-up, whereas stopping working nights was negatively (<jats:italic>\u03b2<\/jats:italic> = \u22120.09, <jats:italic>p<\/jats:italic> &amp;lt; 0.05), associated with flexibility at follow-up. The personality traits languidity and flexibility show fairly high stability, albeit the mean scores were significantly reduced during the 7\u20138 years follow-up period. The results suggest that these personality traits are partly modifiable.<\/jats:p>","DOI":"10.3389\/fpsyg.2021.652569","type":"journal-article","created":{"date-parts":[[2021,7,29]],"date-time":"2021-07-29T05:16:26Z","timestamp":1627535786000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":10,"title":["Stability and Change of the Personality Traits Languidity and Flexibility in a Sample of Nurses: A 7\u20138 Years Follow-Up Study"],"prefix":"10.3389","volume":"12","author":[{"given":"St\u00e5le","family":"Pallesen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eirunn","family":"Thun","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Siri","family":"Waage","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u00d8ystein","family":"Vedaa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anette","family":"Harris","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kjersti Marie","family":"Blytt","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Puneet","family":"Kaur","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bj\u00f8rn","family":"Bjorvatn","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2021,7,29]]},"reference":[{"key":"ref1","volume-title":"International Classification of Sleep Disorders.","year":"2014"},{"key":"ref2","volume-title":"Diagnostic and Statistical Manual of Mental Disorders.","year":"1994"},{"key":"ref3","volume-title":"Diagnostic and Statistical Manual of Mental Disorders.","year":"2013"},{"key":"ref4","first-page":"507","article-title":"Amplitude of the oral temperature circadian rhythm and the tolerance to shift work","volume":"75","author":"Andlauer","year":"1979","journal-title":"J. Physiol."},{"key":"ref5","doi-asserted-by":"publisher","first-page":"1139","DOI":"10.1177\/0018726708094863","article-title":"Survey response rate levels and trends in organizational research","volume":"61","author":"Baruch","year":"2008","journal-title":"Hum. Relat."},{"key":"ref6","doi-asserted-by":"publisher","first-page":"220","DOI":"10.1016\/j.smrv.2018.03.005","article-title":"Individual vulnerability to insomnia, excessive sleepiness and shift work disorder amongst healthcare shift workers. A systematic review","volume":"41","author":"Booker","year":"2018","journal-title":"Sleep Med. Rev."},{"key":"ref7","doi-asserted-by":"publisher","first-page":"698","DOI":"10.3109\/07420528.2014.895742","article-title":"Correlations between objective and subjective sleep and circadian markers in remitted patients with bipolar disorder","volume":"31","author":"Boudebesse","year":"2014","journal-title":"Chronobiol. Int."},{"key":"ref8","doi-asserted-by":"publisher","first-page":"1042","DOI":"10.3109\/07420528.2013.798330","article-title":"Chronotypes of bipolar patients in remission: validation of the French version of the circadian type inventory in the FACE-BD sample","volume":"30","author":"Boudebesse","year":"2013","journal-title":"Chronobiol. Int."},{"key":"ref9","doi-asserted-by":"publisher","first-page":"285","DOI":"10.1111\/j.1365-2702.2008.02583.x","article-title":"Factors associated with perceived sleep quality of nurses working on rotating shifts","volume":"18","author":"Chan","year":"2009","journal-title":"J. Clin. Nurs."},{"key":"ref10","doi-asserted-by":"publisher","first-page":"233","DOI":"10.1207\/s15328007sem0902_5","article-title":"Evaluating goodness-of-fit indexes for testing measurement invariance","volume":"9","author":"Cheung","year":"2002","journal-title":"Struct. Equ. Model."},{"key":"ref11","doi-asserted-by":"publisher","first-page":"1293","DOI":"10.1016\/j.paid.2005.04.012","article-title":"A validation of the revised circadian type inventory in a working sample","volume":"39","author":"Di Milia","year":"2005","journal-title":"Personal. Individ. Differ."},{"key":"ref12","doi-asserted-by":"publisher","first-page":"79","DOI":"10.1080\/00140137908924591","article-title":"Toward a predictive test of adjustment to shift work","volume":"22","author":"Folkard","year":"1979","journal-title":"Ergonomics"},{"key":"ref13","doi-asserted-by":"publisher","first-page":"e12658","DOI":"10.1111\/jsr.12658","article-title":"Shift work with and without night work as a risk factor for fatigue and changes in sleep length: a cohort study with linkage to records on daily working hours","volume":"28","author":"H\u00e4rm\u00e4","year":"2019","journal-title":"J. Sleep Res."},{"key":"ref14","doi-asserted-by":"publisher","first-page":"1868","DOI":"10.1111\/jocn.14778","article-title":"The effects of amplitude and stability of circadian rhythm and occupational stress on burnout syndrome and job dissatisfaction among irregular shift working nurses","volume":"28","author":"Hosseinabadi","year":"2019","journal-title":"J. Clin. Nurs."},{"key":"ref15","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1080\/10705519909540118","article-title":"Cutoff criteria for fit indexes in covariance structure analysis: conventional criteria versus new alternatives","volume":"6","author":"Hu","year":"1999","journal-title":"Struct. Equ. Model."},{"key":"ref16","doi-asserted-by":"publisher","first-page":"91","DOI":"10.1093\/ije\/23.1.91","article-title":"Differences in self-reported morbidity by marital-status and by living arrangement","volume":"23","author":"Joung","year":"1994","journal-title":"Int. J. Epidemiol."},{"key":"ref17","doi-asserted-by":"publisher","first-page":"150","DOI":"10.1016\/j.apnr.2014.09.007","article-title":"Contributors to shift work tolerance in south Korean nurses working rotating shift","volume":"28","author":"Jung","year":"2015","journal-title":"Appl. Nurs. Res."},{"key":"ref18","doi-asserted-by":"publisher","first-page":"719","DOI":"10.1016\/j.apergo.2010.11.006","article-title":"Personality factors related to shift work tolerance in two- and three-shift workers","volume":"42","author":"Natvik","year":"2011","journal-title":"Appl. Ergon."},{"key":"ref19","doi-asserted-by":"publisher","first-page":"691","DOI":"10.2466\/pms.107.3.691-706","article-title":"A new scale for measuring insomnia: the Bergen insomnia scale","volume":"107","author":"Pallesen","year":"2008","journal-title":"Percept. Mot. Skills"},{"key":"ref20","doi-asserted-by":"publisher","first-page":"619","DOI":"10.1093\/sleep\/30.5.619","article-title":"Prevalence and risk factors of subjective sleepiness in the general adult population","volume":"30","author":"Pallesen","year":"2007","journal-title":"Sleep"},{"key":"ref21","doi-asserted-by":"publisher","first-page":"58","DOI":"10.1136\/oem.58.1.58","article-title":"Comparing performance on a simulated 12 hour shift rotation in young and older subjects","volume":"58","author":"Reid","year":"2001","journal-title":"Occup. Environ. Med."},{"key":"ref22","doi-asserted-by":"publisher","first-page":"S82","DOI":"10.1093\/sleep\/5.S2.S82","article-title":"Circadian variation of sleep tendency in elderly and young-adult subjects","volume":"5","author":"Richardson","year":"1982","journal-title":"Sleep"},{"key":"ref23","doi-asserted-by":"publisher","first-page":"zsz015","DOI":"10.1093\/sleep\/zsz015","article-title":"Long-term effects of pregnancy and childbirth on sleep satisfaction and duration of first-time and experienced mothers and fathers","volume":"42","author":"Richter","year":"2019","journal-title":"Sleep"},{"key":"ref24","doi-asserted-by":"publisher","first-page":"201","DOI":"10.2486\/indhealth.SW-5","article-title":"Working time society consensus statements: individual differences in shift work tolerance and recommendations for research and practice","volume":"57","author":"Ritonja","year":"2019","journal-title":"Ind. Health"},{"key":"ref25","doi-asserted-by":"publisher","first-page":"255","DOI":"10.11183\/jhe1972.30.255","article-title":"A week of simulated night work delays salivary melatonin onset","volume":"30","author":"Roach","year":"2001","journal-title":"J. Hum. Ergol."},{"key":"ref26","doi-asserted-by":"publisher","first-page":"312","DOI":"10.1080\/10803548.2015.1081770","article-title":"Relationship between circadian rhythm amplitude and stability with sleep quality and sleepiness among shift nurses and health care workers","volume":"21","author":"Roodbandi","year":"2015","journal-title":"Int. J. Occup. Saf. Ergon."},{"key":"ref27","doi-asserted-by":"publisher","first-page":"221","DOI":"10.1016\/j.smrv.2010.07.002","article-title":"Individual differences in tolerance to shift work: a systematic review","volume":"15","author":"Saksvik","year":"2011","journal-title":"Sleep Med. Rev."},{"key":"ref28","doi-asserted-by":"publisher","first-page":"143","DOI":"10.1080\/02678373.2012.686344","article-title":"Personality factors predicting changes in shift work tolerance: a longitudinal study among nurses working rotating shifts","volume":"26","author":"Saksvik-Lehouillier","year":"2012","journal-title":"Work Stress."},{"key":"ref29","doi-asserted-by":"publisher","first-page":"1136","DOI":"10.1111\/j.1365-2648.2012.06105.x","article-title":"Individual, situational, and lifestyle factors related to shift work tolerance among nurses who are new to- and experienced in night work","volume":"69","author":"Saksvik-Lehouillier","year":"2013","journal-title":"J. Adv. Nurs."},{"key":"ref30","doi-asserted-by":"publisher","first-page":"141","DOI":"10.1177\/1088868308315702","article-title":"Coregulation, dysregulation, self-regulation: an integrative analysis and empirical agenda for understanding adult attachment, separation, loss, and recovery","volume":"12","author":"Sbarra","year":"2008","journal-title":"Personal. Soc. Psychol. Rev."},{"key":"ref31","doi-asserted-by":"publisher","first-page":"559","DOI":"10.1076\/brhm.31.5.559.5655","article-title":"The relationship between sleep and shift system, age and chronotype in shift workers","volume":"31","author":"Seo","year":"2000","journal-title":"Biol. Rhythm. Res."},{"key":"ref32","doi-asserted-by":"publisher","first-page":"154","DOI":"10.1136\/oem.2009.053512","article-title":"Considerations of circadian impact for defining \u2018shift work\u2019 in cancer studies: IARC working group report","volume":"68","author":"Stevens","year":"2011","journal-title":"Occup. Environ. Med."},{"key":"ref33","doi-asserted-by":"publisher","first-page":"e003696","DOI":"10.1136\/bmjopen-2013-003696","article-title":"Personality factors predict sleep related shift work tolerance in different shifts at two year follow-up: a prospective study","volume":"3","author":"Storemark","year":"2013","journal-title":"BMJ Open"},{"key":"ref34","doi-asserted-by":"publisher","first-page":"233","DOI":"10.1081\/cbi-100101046","article-title":"Circadian rhythms and sleep in human aging","volume":"17","author":"Van Someren","year":"2000","journal-title":"Chronobiol. Int."},{"key":"ref35","doi-asserted-by":"publisher","first-page":"152","DOI":"10.1016\/j.paid.2013.02.016","article-title":"Longitudinal predictors of changes in the morningness-eveningness personality among Norwegian nurses","volume":"55","author":"Vedaa","year":"2013","journal-title":"Personal. Individ. Differ."},{"key":"ref36","doi-asserted-by":"publisher","first-page":"51","DOI":"10.1016\/j.sleep.2015.12.002","article-title":"Prospective study of predictors and consequences of insomnia: personality, lifestyle, mental health, and work-related stressors","volume":"20","author":"Vedaa","year":"2016","journal-title":"Sleep Med."}],"container-title":["Frontiers in Psychology"],"original-title":[],"link":[{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fpsyg.2021.652569\/full","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,7,29]],"date-time":"2021-07-29T05:16:32Z","timestamp":1627535792000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fpsyg.2021.652569\/full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,7,29]]},"references-count":36,"alternative-id":["10.3389\/fpsyg.2021.652569"],"URL":"https:\/\/doi.org\/10.3389\/fpsyg.2021.652569","relation":{},"ISSN":["1664-1078"],"issn-type":[{"value":"1664-1078","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,7,29]]},"article-number":"652569"}}