Distribution of Chronotypes in a Large Sample of Young Adult Saudis

BaHammam, Ahmed S.; Almestehi, Wael; Albatli, Abdurrahman; AlShaya, Shaya

doi:10.5144/0256-4947.2011.183

Cited by 5 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding gender, some studies failed to show a relationship of this variable with morningnesseveningness preferences. 37,45,46 However, sex differences should be taken into account in morningness-eveningness studies assessing people with irregular work schedules.…”

Section: Influence Of Mealtimesmentioning

confidence: 99%

Chronotype: a review of the advances, limits and applicability of the main instruments used in the literature to assess human phenotype

Levandovski

Sasso

Hidalgo

2013

Trends Psychiatry Psychother.

153

View full text Add to dashboard Cite

The study of circadian typology differences has increased in the last few years. As a result, new instruments have been developed to estimate the individual circadian phase of temporal human behavior, also referred as chronotype. The current review was conducted to evaluate the differences among the questionnaires most frequently used to assess chronotype: the Morningness-Eveningness Questionnaire (MEQ), the Composite Scale of Morningness (CSM), and the Munich Chronotype Questionnaire (MCTQ). Each instrument evaluates a different aspect of chronotype. MEQ is considered to evaluate the phase preferences of individual behavior over a 24-hour day, while MCTQ measures the phase of sleep positions for both free and work days. CSM is similar to MEQ, but is more sensitive to measure shift work. The concept of chronotype has been used to refer to phase positions or phase preferences in the literature reviewed. Most of the time this is a consequence of different interpretations: it is not clear whether phase preferences are a direct manifestation of the individual's internal clock or a result of external cues, e.g., social interaction (including the alarm clock). Also, phase preferences are not uniform throughout life. Therefore, a single assessment, not taking age into consideration, will not accurately describe the sample. We suggest that MCTQ is the best instrument for investigators dealing with desynchronization and as an instrument for sleep phase. Conversely, if the goal is to assess characteristics that change under specific situations - chronotype -, the MEQ should be used.

show abstract

Section: Influence Of Mealtimesmentioning

confidence: 99%

Chronotype: a review of the advances, limits and applicability of the main instruments used in the literature to assess human phenotype

Levandovski

Sasso

Hidalgo

2013

Trends Psychiatry Psychother.

153

View full text Add to dashboard Cite

show abstract

“…Present result was similar to another research from Middle East where no particular trend was observed in university students rather intermediate typology "neither type" was evidenced. Geographical location of the region, studied in that particular research was seemingly that the individuals were exposed to intense light in that area 16 . Emerging knowledge of sleep system in studies from different parts of the world have increased the awareness of the prevalence of sleep disorders and its management with different techniques, one of which is bright light therapy.…”

Section: Discussionmentioning

confidence: 99%

Present Trend in Eveningness Amongst Medical Students in the East

Jabeen

Matloob²,

Maqsood

2015

TPMJ

View full text Add to dashboard Cite

Objectives: To analyze individual preference in organizing their behavior within24 hours(Human chronotypes) also referred to as morningness/ eveningness. Setting: DowMedical College, Dow university of Health Sciences Karachi. Period: From September 2012 toDecember 2013. Study Design: Cross-sectional. Methods: Subjects (Medical students) fromfirst semester to final semester were invited to participate in this study, A total of 710 subjectswere included. Their demographic data such as age, gender was obtained. Instrument is anintegrated questionnaire (Horne JA and Ostberg O Morningness- Eveningness questionnaireMEQ original 1976) designed to assess chronotype of young adult population. Results:Out of different existing chronotypes, biggest group which dominated the current study wasintermediate type. Conclusions: Present study determined, chronotype of young population(medical students) of this region. The assessment of individual chronotype is important not onlyfor the diagnosis and treatment of sleep disorders, additionally to evaluate ability to adapt forspecific work schedule.

show abstract

“…This version classifies individuals in 3 categories (Taillard, Philip, Chastang, & Bioulac, 2004): morning chronotype: 18 to 25, neutral chronotype: 12 to 17, and evening chronotype: 4 to 11. We used a validated version in Arabic of the MEQr (BaHammam, Almistehi, Almestehi, Albatli, & AlShaya, 2011).…”

Section: Methodsmentioning

confidence: 99%

Sleep in first‐episode schizophrenia patients, their unaffected siblings and healthy controls: A comparison

Fekih‐Romdhane

Nefzi

Sassi

et al. 2020

Early Intervention Psych

View full text Add to dashboard Cite

Background Sleep disturbances in schizophrenia are common throughout its course including in the prodrome, and have been mainly attributed to severity of symptoms and antipsychotic use. We aimed to investigate whether early course patients with schizophrenia and young non‐psychotic siblings of patients with schizophrenia also show sleep disturbances and whether sleep correlates with symptoms and functioning. Methods Three study groups, that is, adults newly diagnosed with schizophrenia (n = 54), young non‐psychotic siblings of schizophrenia patients (n = 56) and a sample of healthy controls matched to the patients and siblings (n = 61) were evaluated on Horne and Ostberg Morningness‐Eveningness Questionnaire, Epworth Sleepiness Scale and Pittsburgh Sleep Quality Index. Severity of symptoms and functioning are assessed using the Positive and Negative Syndrome Scale and the Global Assessment of Functioning Scale, respectively. Age, gender, occupation and marital status were regarded as covariates, and differences between the three groups were evaluated using analysis of covariance. Results Early course schizophrenia patients and non‐psychotic siblings of schizophrenia patients showed significantly reduced sleep quality relative to healthy controls (P < .001). Schizophrenia patients had significantly higher daytime sleepiness compared to controls (P < .001). Chronotypes in schizophrenia patients and unaffected siblings did not significantly differ from those of the healthy controls. Conclusions Like chronic medicated schizophrenia patients, early course schizophrenia patients and young non‐psychotic siblings of individuals with schizophrenia have sleep disturbances. These findings indicate that sleep markers can distinguish unaffected siblings of schizophrenia from healthy controls and serve as an endophenotype for schizophrenia.

show abstract

Distribution of Chronotypes in a Large Sample of Young Adult Saudis

Cited by 5 publications

References 15 publications

Chronotype: a review of the advances, limits and applicability of the main instruments used in the literature to assess human phenotype

Chronotype: a review of the advances, limits and applicability of the main instruments used in the literature to assess human phenotype

Present Trend in Eveningness Amongst Medical Students in the East

Sleep in first‐episode schizophrenia patients, their unaffected siblings and healthy controls: A comparison

Contact Info

Product

Resources

About