{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T10:37:59Z","timestamp":1777891079517,"version":"3.51.4"},"reference-count":30,"publisher":"SAGE Publications","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["WOR"],"published-print":{"date-parts":[[2021,11,26]]},"abstract":"<jats:p>BACKGROUND: COVID-19 emerged as a serious pandemic in 2019 and billions of people were infected. Various precautionary methods were taken to contain the spread of virus such as social distancing, public lockdown, sanitation, and closure of schools and colleges. Many colleges started online classes to resume their syllabus and to complete the course curriculum. These evening online sessions resulted in late night sleep, long term mobile\/computer exposure, and disturbed sleep pattern. OBJECTIVE: The present study aimed to determine the impact of COVID-19 online classes on morningness- eveningness personality and to compare it with different age groups, gender, and body mass index. METHODS: The cluster sampling method was used to collect the subjects from the total of 1153 adult college students, 897 subjects were selected based on the selection criteria and instructed to submit an online survey consists of the Morningness-eveningness Questionnaire and demographic and anthropometric data through mail, social media, or through a researcher by direct interview. RESULTS: The mean score for the 897 participants is 56.7, indicating intermediate morningness-eveningness personality type. On comparing the different groups, the youngest group (18\u201320 years) scored 4.23%(mean\u200a=\u200a46.7), female subjects scored 6.13%(mean\u200a=\u200a58.1), the underweight 2.67%(mean\u200a=\u200a59.2) and overweight groups scored 2.89%(mean\u200a=\u200a59.7) indicating definite eveningness. Among the 897 collected samples of the population 8.13%of the subjects experienced definite eveningness, 14.93%has moderate eveningness, 17.38%are under intermediate category, 22.4%have moderate morningness, and 37.11%have definite morningness. CONCLUSIONS: Subjects with eveningness personality have high risk of developing mental illness, thus it\u2019s important to determine the eveningness personality among student population to avoid serious complications in later age.<\/jats:p>","DOI":"10.3233\/wor-210528","type":"journal-article","created":{"date-parts":[[2021,10,29]],"date-time":"2021-10-29T11:50:09Z","timestamp":1635508209000},"page":"695-700","source":"Crossref","is-referenced-by-count":7,"title":["Impact of COVID-19 online classes on morningness-eveningness personality among adult college students: A survey study"],"prefix":"10.1177","volume":"70","author":[{"given":"Vignesh","family":"Srinivasan","sequence":"first","affiliation":[{"name":"Saveetha College of Physiotherapy, SIMATS, Chennai, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Surya","family":"Vishnuram","sequence":"additional","affiliation":[{"name":"Saveetha College of Physiotherapy, SIMATS, Chennai, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Prathap","family":"Suganthirababu","sequence":"additional","affiliation":[{"name":"Saveetha College of Physiotherapy, SIMATS, Chennai, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Kumaresan","sequence":"additional","affiliation":[{"name":"Saveetha College of Physiotherapy, SIMATS, Chennai, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"Divyalaxmi","sequence":"additional","affiliation":[{"name":"Saveetha College of Physiotherapy, SIMATS, Chennai, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Saranya Devi","sequence":"additional","affiliation":[{"name":"Saveetha College of Physiotherapy, SIMATS, Chennai, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jagatheesan","family":"Alagesan","sequence":"additional","affiliation":[{"name":"Saveetha College of Physiotherapy, SIMATS, 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