Pub Date : 2022-07-18DOI: 10.1080/09291016.2022.2102707
Prasanna Pal, A. Aggarwal, R. Deb
ABSTRACT A photoperiod is the time duration when animals are exposed to light in an entire day. An exposure of 16 hours or more is considered a long-day photoperiod and 8 hours of light is a short-day photoperiod. Exposure to light prevents the secretion of melatonin from the pineal gland. Melatonin can influence the release of several hormones, including prolactin, cortisol, kisspeptin, GnRH and others. Eventually, it can also affect the reproductive performance of the animal. Though cattle are not a seasonal breeder, photoperiod has an indirect role in the onset of puberty, pregnancy and parturition. It can also promote the growth rate of the heifers and enhance their reproductive capabilities, which are very much desired by the producers. Therefore, photoperiod can be used as an effective and non-invasive tool in the reproductive management of cattle.
{"title":"Effects of photoperiod on reproduction of cattle: a review","authors":"Prasanna Pal, A. Aggarwal, R. Deb","doi":"10.1080/09291016.2022.2102707","DOIUrl":"https://doi.org/10.1080/09291016.2022.2102707","url":null,"abstract":"ABSTRACT A photoperiod is the time duration when animals are exposed to light in an entire day. An exposure of 16 hours or more is considered a long-day photoperiod and 8 hours of light is a short-day photoperiod. Exposure to light prevents the secretion of melatonin from the pineal gland. Melatonin can influence the release of several hormones, including prolactin, cortisol, kisspeptin, GnRH and others. Eventually, it can also affect the reproductive performance of the animal. Though cattle are not a seasonal breeder, photoperiod has an indirect role in the onset of puberty, pregnancy and parturition. It can also promote the growth rate of the heifers and enhance their reproductive capabilities, which are very much desired by the producers. Therefore, photoperiod can be used as an effective and non-invasive tool in the reproductive management of cattle.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49316502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-21DOI: 10.1080/09291016.2022.2090673
Anis Saddoud, Ghazi Rekik, Yosra Belkhir, Noureddine Kammoun, S. Hidouri, M. Chlif, M. Jarraya
ABSTRACT To explore how one night of total sleep deprivation (TSD) could affect cognitive and physical performances, as well as subjective experiences in 24 elite Kung-Fu athletes (age: 20.2 ± 1.76 years; body mass: 64.67 ± 6.52 kg; height: 1.71 ± 0.04 m). Participants completed, in a randomized counterbalanced order, two tests sessions in the late-afternoon (separated by 72-h recovery) under normal sleep (NS) and TSD conditions. Specific decision-making skills (decision accuracy (DA) and decision time (DT)), various anaerobic-exercises performance (i.e. seated medicine-ball throw (SMBT), horizontal jump (HJ), vertical jump (VJ), isometric back-muscles strength (IBMS), and isometric leg-muscles strength (ILMS)), mood states, and perceptual responses (attention and concentration) were assessed. The TSD was associated with lower values of vigor, and higher values of anxiety, depression, fatigue, anger, confusion, and total mood disturbance, compared to NS. The TSD resulted in lower attention and concentration, compared to NS. Similarly, lower performances of SMBT, HJ, VJ, and ILMS were recorded after TSD compared to NS. For cognitive performances, the TSD resulted in higher DA and lower DT, compared to NS. In summary, one night of TSD elicits negative effects on decision-making and anaerobic performance in Kung-Fu elites through disturbances in mood and attentional capacities.
{"title":"One night of total sleep deprivation impairs decision-making skills, anaerobic performances, mood states, and perceptual responses in elite Kung-Fu athletes","authors":"Anis Saddoud, Ghazi Rekik, Yosra Belkhir, Noureddine Kammoun, S. Hidouri, M. Chlif, M. Jarraya","doi":"10.1080/09291016.2022.2090673","DOIUrl":"https://doi.org/10.1080/09291016.2022.2090673","url":null,"abstract":"ABSTRACT To explore how one night of total sleep deprivation (TSD) could affect cognitive and physical performances, as well as subjective experiences in 24 elite Kung-Fu athletes (age: 20.2 ± 1.76 years; body mass: 64.67 ± 6.52 kg; height: 1.71 ± 0.04 m). Participants completed, in a randomized counterbalanced order, two tests sessions in the late-afternoon (separated by 72-h recovery) under normal sleep (NS) and TSD conditions. Specific decision-making skills (decision accuracy (DA) and decision time (DT)), various anaerobic-exercises performance (i.e. seated medicine-ball throw (SMBT), horizontal jump (HJ), vertical jump (VJ), isometric back-muscles strength (IBMS), and isometric leg-muscles strength (ILMS)), mood states, and perceptual responses (attention and concentration) were assessed. The TSD was associated with lower values of vigor, and higher values of anxiety, depression, fatigue, anger, confusion, and total mood disturbance, compared to NS. The TSD resulted in lower attention and concentration, compared to NS. Similarly, lower performances of SMBT, HJ, VJ, and ILMS were recorded after TSD compared to NS. For cognitive performances, the TSD resulted in higher DA and lower DT, compared to NS. In summary, one night of TSD elicits negative effects on decision-making and anaerobic performance in Kung-Fu elites through disturbances in mood and attentional capacities.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42130126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-17DOI: 10.1080/09291016.2022.2090672
Neslihan Durmuşoğlu Saltali, Nesibe Günay Molu, M. Ateş
ABSTRACT Parent-child sleep interaction is significant considering the high incidence of sleep problems in early childhood and the influence of parents on children’s sleep habits. This study aimed to investigate the psychometric properties of a Turkish adaptation of the Parent-Child Sleep Interaction Scale (PSIS) for preschoolers. We evaluated the internal consistency, test−retest reliability, construct validity, and criterion validity of the PSIS. The study was carried out with 424 parents of preschoolers between January and June 2021. The Confirmatory factor analysis (CFA) confirmed the three-dimensional and 12-item structure of the scale with acceptable fit values. The Cronbach’s alpha coefficients for the factors of the scale were 0.81 for sleep dependence, 0.76 for sleep reinforcement, and 0.72 for sleep conflict. Test-retest correlations were 0.87, 0.86, and 0.94, respectively (p < .05). The Pictorial Pediatric Symptom Checklist (PPSC) externalizing scores correlated significantly with the PSIS total scores and sleep conflict scores. The PPSC internalizing scores were significantly correlated with the PSIS total and sleep conflict scores. Our study is the first to establish the validity and reliability of the PSIS for Turkish preschoolers.
{"title":"Psychometric evaluation of the Turkish Adaptation of Parent-Child Sleep Interaction Scale (PSIS) for preschoolers","authors":"Neslihan Durmuşoğlu Saltali, Nesibe Günay Molu, M. Ateş","doi":"10.1080/09291016.2022.2090672","DOIUrl":"https://doi.org/10.1080/09291016.2022.2090672","url":null,"abstract":"ABSTRACT Parent-child sleep interaction is significant considering the high incidence of sleep problems in early childhood and the influence of parents on children’s sleep habits. This study aimed to investigate the psychometric properties of a Turkish adaptation of the Parent-Child Sleep Interaction Scale (PSIS) for preschoolers. We evaluated the internal consistency, test−retest reliability, construct validity, and criterion validity of the PSIS. The study was carried out with 424 parents of preschoolers between January and June 2021. The Confirmatory factor analysis (CFA) confirmed the three-dimensional and 12-item structure of the scale with acceptable fit values. The Cronbach’s alpha coefficients for the factors of the scale were 0.81 for sleep dependence, 0.76 for sleep reinforcement, and 0.72 for sleep conflict. Test-retest correlations were 0.87, 0.86, and 0.94, respectively (p < .05). The Pictorial Pediatric Symptom Checklist (PPSC) externalizing scores correlated significantly with the PSIS total scores and sleep conflict scores. The PPSC internalizing scores were significantly correlated with the PSIS total and sleep conflict scores. Our study is the first to establish the validity and reliability of the PSIS for Turkish preschoolers.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43942310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-16DOI: 10.1080/09291016.2022.2088662
İsmail Önder, A. Önder, Ezgi Güven Yıldırım
ABSTRACT Academic burnout and engagement are critical factors in student success, school attendance and dropout. It is important to determine the variables associated with burnout and engagement to develop university students and their competencies. Therefore, the current study aims to elucidate the association of morningness-eveningness preferences, average sleep length (ASL) and social jetlag (SJL) with burnout and engagement in university students. The sample was composed of 270 university students. The composite scale of morningness (CSM), the Maslach burnout inventory-student scale, student engagement scale and a questionnaire were utilized. CSM total score was found to correlate with both burnout and engagement sub-domains significantly. In addition, CSM total score was a significant predictor in all burnout and engagement models. ASL was a significant predictor of exhaustion and cynicism while SJL was significant predictor of efficacy. Both ASL and SJL were significant predictors of silent in-class behaviours sub-domain of engagement. In sum, CSM total score was found to be the most significant predictor of both burnout and engagement compared to other study variables. Considering the relationships of CSM total score with burnout and engagement sub-dimensions, eveningness can be treated as an important risk factor for burnout and engagement in the context of university students.
{"title":"Burnout and engagement in university students: relationships with morningness-eveningness preferences, average sleep length and social jetlag","authors":"İsmail Önder, A. Önder, Ezgi Güven Yıldırım","doi":"10.1080/09291016.2022.2088662","DOIUrl":"https://doi.org/10.1080/09291016.2022.2088662","url":null,"abstract":"ABSTRACT Academic burnout and engagement are critical factors in student success, school attendance and dropout. It is important to determine the variables associated with burnout and engagement to develop university students and their competencies. Therefore, the current study aims to elucidate the association of morningness-eveningness preferences, average sleep length (ASL) and social jetlag (SJL) with burnout and engagement in university students. The sample was composed of 270 university students. The composite scale of morningness (CSM), the Maslach burnout inventory-student scale, student engagement scale and a questionnaire were utilized. CSM total score was found to correlate with both burnout and engagement sub-domains significantly. In addition, CSM total score was a significant predictor in all burnout and engagement models. ASL was a significant predictor of exhaustion and cynicism while SJL was significant predictor of efficacy. Both ASL and SJL were significant predictors of silent in-class behaviours sub-domain of engagement. In sum, CSM total score was found to be the most significant predictor of both burnout and engagement compared to other study variables. Considering the relationships of CSM total score with burnout and engagement sub-dimensions, eveningness can be treated as an important risk factor for burnout and engagement in the context of university students.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48492582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-31DOI: 10.1080/09291016.2022.2081400
Filipa Almeida, Luís Pires, Catarina Bettencourt, R. Almeida, D. Ruivo Marques, J. Leitão, A. Gomes
ABSTRACT Synchrony effects regarding mood diurnal fluctuations (i.e., better mood at optimal and worse mood at suboptimal times-of-day, corresponding to the interaction between chronotype* time-of-day) have been studied in adolescents and adults. However, evidence in children is lacking. We investigated the interactive effect of chronotype and time-of-day on primary school children’s momentary emotional states, in a naturalistic setting. From an initial pool of 298 3rd/4th graders (7–11 years-old), 134 Morning (M)-type and Evening (E)-type children were selected using the parental-report Children ChronoType Questionnaire (CCTQ). Potential covariates were assessed based on parental questionnaires. Students completed emotional states’ measures on the first (9 a.m.) and last lessons (4 p.m.) of the school day, in a counterbalanced order. Given the intercorrelations between emotional measures, a composite score of momentary emotional states was determined. There was a small-to-moderate significant interactive effect of chronotype*time-of-day in the overall momentary emotional states score. M/E-types showed better overall momentary emotional states when tested at their optimal time-of-day. Chronotype or time-of-day main effects were non-significant, and the overall momentary emotional states score did not correlate with sleep or psychopathological symptoms. In the present study, children overall momentary emotional states in a naturalistic setting varied depending on chronotype combined with time-of-day.
{"title":"Momentary emotional states in primary school children: combined effects of chronotype X time-of-day","authors":"Filipa Almeida, Luís Pires, Catarina Bettencourt, R. Almeida, D. Ruivo Marques, J. Leitão, A. Gomes","doi":"10.1080/09291016.2022.2081400","DOIUrl":"https://doi.org/10.1080/09291016.2022.2081400","url":null,"abstract":"ABSTRACT Synchrony effects regarding mood diurnal fluctuations (i.e., better mood at optimal and worse mood at suboptimal times-of-day, corresponding to the interaction between chronotype* time-of-day) have been studied in adolescents and adults. However, evidence in children is lacking. We investigated the interactive effect of chronotype and time-of-day on primary school children’s momentary emotional states, in a naturalistic setting. From an initial pool of 298 3rd/4th graders (7–11 years-old), 134 Morning (M)-type and Evening (E)-type children were selected using the parental-report Children ChronoType Questionnaire (CCTQ). Potential covariates were assessed based on parental questionnaires. Students completed emotional states’ measures on the first (9 a.m.) and last lessons (4 p.m.) of the school day, in a counterbalanced order. Given the intercorrelations between emotional measures, a composite score of momentary emotional states was determined. There was a small-to-moderate significant interactive effect of chronotype*time-of-day in the overall momentary emotional states score. M/E-types showed better overall momentary emotional states when tested at their optimal time-of-day. Chronotype or time-of-day main effects were non-significant, and the overall momentary emotional states score did not correlate with sleep or psychopathological symptoms. In the present study, children overall momentary emotional states in a naturalistic setting varied depending on chronotype combined with time-of-day.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45661390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-02DOI: 10.1080/09291016.2022.2069646
Preeti Gupta, Ankit Sinha, S. Malik, S. Rani
ABSTRACT Over millennia, environmental light-dark cycle provided a dependable indicator of time of day. It showed the effects of light on physiology and behaviour in every animal. Furthermore, sunrise and sunset (dawn and dusk) usually refer to the duration of day length when the upper edge of the sun’s disk is on the horizon. Interestingly, before the onset of sunrise and after sunset there is twilight (dawn and dusk), during which there is natural light provided by the upper atmosphere. Evidences suggested that transitions (twilight) are more essential to synchronize organisms circadian (circa = about; dian = day) and circannual (circa = about; annum = year) rhythms (seasonal events). Overall, we say that all the characteristics of light pose major changes in the behavior and physiology of animals and plant system. In this mini-review, we discuss the noteworthy aspects of dawn and dusk chorus and the behavioural changes observed during this switching between day and night times.
{"title":"Dawn and dusk chorus as a potential zeitgeber","authors":"Preeti Gupta, Ankit Sinha, S. Malik, S. Rani","doi":"10.1080/09291016.2022.2069646","DOIUrl":"https://doi.org/10.1080/09291016.2022.2069646","url":null,"abstract":"ABSTRACT Over millennia, environmental light-dark cycle provided a dependable indicator of time of day. It showed the effects of light on physiology and behaviour in every animal. Furthermore, sunrise and sunset (dawn and dusk) usually refer to the duration of day length when the upper edge of the sun’s disk is on the horizon. Interestingly, before the onset of sunrise and after sunset there is twilight (dawn and dusk), during which there is natural light provided by the upper atmosphere. Evidences suggested that transitions (twilight) are more essential to synchronize organisms circadian (circa = about; dian = day) and circannual (circa = about; annum = year) rhythms (seasonal events). Overall, we say that all the characteristics of light pose major changes in the behavior and physiology of animals and plant system. In this mini-review, we discuss the noteworthy aspects of dawn and dusk chorus and the behavioural changes observed during this switching between day and night times.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48514950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-28DOI: 10.1080/09291016.2022.2054558
Noorshama Parveen, A. Parganiha
ABSTRACT Obstructive sleep apnea (OSA) is a sleep-related breathing disorder. It occurs due to obstruction on the upper airway of respiration. This disorder can be either complete (apnea) or partial (hypopnea). Interruption in breathing results in the production of a snoring sound, which is one of the prominent symptoms of OSA. Excessive daytime sleepiness (EDS), hypertension, diabetes, etc. are some of the commonly occurring co-morbidities of OSA. OSA is common in the population of middle-aged and elderly people, but pediatric OSA is also eminent. The occurrence of the disease is higher in males. The increasing age, male gender, higher BMI, and comorbidities, such as metabolic syndrome, and obesity are considered as risk factors and make individuals more prone to OSA. The quality of life (Qol) of the individuals also gets affected by the OSA. It also alters the circadian rhythm of various autonomic and biochemical activities of people with OSA. Although polysomnography is considered the gold standard for the diagnosis of OSA, it is very costly and time-consuming. There are many portable monitoring devices and screening questionnaires for the diagnosis of OSA. Screening of OSA before polysomnography or portable monitoring is cost-effective, quick, and productive. In this review, we have highlighted scientific studies related to various factors associated with OSA in human subjects.
{"title":"Consequences and factors associated with OSA: a brief review","authors":"Noorshama Parveen, A. Parganiha","doi":"10.1080/09291016.2022.2054558","DOIUrl":"https://doi.org/10.1080/09291016.2022.2054558","url":null,"abstract":"ABSTRACT Obstructive sleep apnea (OSA) is a sleep-related breathing disorder. It occurs due to obstruction on the upper airway of respiration. This disorder can be either complete (apnea) or partial (hypopnea). Interruption in breathing results in the production of a snoring sound, which is one of the prominent symptoms of OSA. Excessive daytime sleepiness (EDS), hypertension, diabetes, etc. are some of the commonly occurring co-morbidities of OSA. OSA is common in the population of middle-aged and elderly people, but pediatric OSA is also eminent. The occurrence of the disease is higher in males. The increasing age, male gender, higher BMI, and comorbidities, such as metabolic syndrome, and obesity are considered as risk factors and make individuals more prone to OSA. The quality of life (Qol) of the individuals also gets affected by the OSA. It also alters the circadian rhythm of various autonomic and biochemical activities of people with OSA. Although polysomnography is considered the gold standard for the diagnosis of OSA, it is very costly and time-consuming. There are many portable monitoring devices and screening questionnaires for the diagnosis of OSA. Screening of OSA before polysomnography or portable monitoring is cost-effective, quick, and productive. In this review, we have highlighted scientific studies related to various factors associated with OSA in human subjects.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41649167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-21DOI: 10.1080/09291016.2022.2054124
V. Shivarov, Hristo Shivarov, A. Yordanov
ABSTRACT Cancer patients are at increased risk of suicidal behavior. It is well known that suicides show seasonality with peak in the Spring and early Summer suggesting the influence of circa-annual environmental factors. Here we questioned whether cancer diagnosis interacts with the seasonality of suicides. We performed a etrospective analysis of seasonality of suicides among cancer patients registered between 1974 and 2016 in the Surveillance, Epidemiology, and End Results (SEER) database fitting the classical cosinor model . A significant seasonal pattern with a peak in the first half of May was identified. The same peak was observed for both sexes as well as for elderly (> 50 years) and White patients. Patients living in Southern counties had an earlier peak versus those from Northern counties. The rate of both early (within the first year after diagnosis) and late suicides also followed the identical seasonal pattern with peak in May. The analysis per cancer subtypes revealed that only prostate cancer patients had a significant peak in May. Our findings suggest thatcancer diagnosis does not alter the typical seasonal pattern of suicides observed in the general population. Therefore, psychological support in cancer patients must be particularly active in the Spring and early Summer.
{"title":"Seasonality of Suicides among Cancer Patients","authors":"V. Shivarov, Hristo Shivarov, A. Yordanov","doi":"10.1080/09291016.2022.2054124","DOIUrl":"https://doi.org/10.1080/09291016.2022.2054124","url":null,"abstract":"ABSTRACT Cancer patients are at increased risk of suicidal behavior. It is well known that suicides show seasonality with peak in the Spring and early Summer suggesting the influence of circa-annual environmental factors. Here we questioned whether cancer diagnosis interacts with the seasonality of suicides. We performed a etrospective analysis of seasonality of suicides among cancer patients registered between 1974 and 2016 in the Surveillance, Epidemiology, and End Results (SEER) database fitting the classical cosinor model . A significant seasonal pattern with a peak in the first half of May was identified. The same peak was observed for both sexes as well as for elderly (> 50 years) and White patients. Patients living in Southern counties had an earlier peak versus those from Northern counties. The rate of both early (within the first year after diagnosis) and late suicides also followed the identical seasonal pattern with peak in May. The analysis per cancer subtypes revealed that only prostate cancer patients had a significant peak in May. Our findings suggest thatcancer diagnosis does not alter the typical seasonal pattern of suicides observed in the general population. Therefore, psychological support in cancer patients must be particularly active in the Spring and early Summer.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42461501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-11DOI: 10.1080/09291016.2022.2051302
Hakkı Bağcı, Mehmet Barış Horzum
ABSTRACT The present study aims to reveal whether gender, age, personality traits, chronotypes, and smartphone screen-time predict smartphone addiction. This study used the composite scale of morningness, big five inventory, and smartphone addiction scale for collecting data. Females showed higher levels of smartphone addiction than males. Furthermore, age was not a significant predictor of smartphone addiction. We revealed that conscientiousness and neuroticism were significant predictors of smartphone addiction while extraversion, agreeableness, and openness to experience were not. We also found that neurotic people had higher levels of smartphone addiction. We revealed in this study that people with evening chronotypes had higher levels of smartphone addiction. In conclusion, female, neurotic, eveningness chronotypes, and students who use smartphones at high levels were more addicted to smartphones.
{"title":"The relationship of smartphone addiction with chronotype and personality structures in university students","authors":"Hakkı Bağcı, Mehmet Barış Horzum","doi":"10.1080/09291016.2022.2051302","DOIUrl":"https://doi.org/10.1080/09291016.2022.2051302","url":null,"abstract":"ABSTRACT The present study aims to reveal whether gender, age, personality traits, chronotypes, and smartphone screen-time predict smartphone addiction. This study used the composite scale of morningness, big five inventory, and smartphone addiction scale for collecting data. Females showed higher levels of smartphone addiction than males. Furthermore, age was not a significant predictor of smartphone addiction. We revealed that conscientiousness and neuroticism were significant predictors of smartphone addiction while extraversion, agreeableness, and openness to experience were not. We also found that neurotic people had higher levels of smartphone addiction. We revealed in this study that people with evening chronotypes had higher levels of smartphone addiction. In conclusion, female, neurotic, eveningness chronotypes, and students who use smartphones at high levels were more addicted to smartphones.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46087020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-11DOI: 10.1080/09291016.2022.2044631
Gizem Özata Uyar, H. Yıldıran
ABSTRACT Circadian rhythms, also known as circadian clocks, are cyclic endogenous biological patterns of an approximately 24-hour cycle which regulate the timing of physiology, metabolism, and behavior. Recent research in the field of circadian science has suggested that the timing of food intake may also play a role in markers of health, in addition to food choice and food quantity. There is emerging evidence suggesting that the timing of dietary intake, so-called chrono-nutrition, may be influenced by an individuals chronotype. For example, the evening type has been linked to unhealthy diet, which could indicate a higher possibility of obesity. On the other hand, the continuum of chronotype diversity is largely mediated by genes. The presence of single nucleotide polymorphisms (SNP) of clock genes have been associated with obesity, chronotype, metabolic disturbances, and dietary habits (e.g., breakfast skipping, meal timing, energy/macronutrient intake). In this review, we outline the current knowledge of the interactions between clock genes, chronotype, dietary intake and chrono-nutrition.Additionally, it is emphasized that the COVID-19 pandemichas had a significant impact on the circadian system, dietary choices and meal timing. For this reason, the current review aims to focus on how chronotype/sleep and chrono-nutrition are affected during the COVID-19 pandemic.
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