Ons between central (suprachiasmatic nucleus) timing mechanisms and putative oscillators elsewhere

Ons between central (suprachiasmatic nucleus) timing mechanisms and putative oscillators elsewhere in the central nervous system or periphery such as the stomach. Given that altered food intake timings could be causing the hormonal patterns, it is acknowledged that further studies with controlled meal times would be needed to establish cause and effect.2 Despite similarities in NES eating behaviour, considerable difference is noted between studies in the average amount consumed by NES individuals after the evening meal. Criteria up to 2003 required an intake of at least 50 , although most researchers considered this unnecessarily restrictive and relaxed this requirement downwards when recruiting for studies.22,27,28 Accurate estimation of daily dietary intake during verbal recall is difficult with some studies reporting a tendency for overestimation in NES participants.27,29 Individuals in one study verbally reported eating 51 of their daily energy intake after the evening meal but only recorded 34.9 in food diaries.29 Conversely under-reporting, particularly in overweight and obese individuals, is a common phenomenon with LT-253 web evidence of the degree of under-reporting in epidemiological studies ranging from 10 to 47 .30 Current NES guidelines suggest at least 25 ofBEHAVIOURAL AND CLINICAL CHARACTERISTICS A landmark study of NES in BX795 supplier American females (mean BMI 28.5 kg m ?2) based on 1996 criteria showed NES and non-NES participants to have similar sleep onset, offset and duration times, but NES individuals woke on an average 3.6 times a night and snacked to return to sleep.23 A later American replication study (mean BMI 34.9 kg m ?2), using 2003 criteria, showed similar patterns, with the NES group waking on an average 1.5 times per night and eating during 74 of the awakenings.24,25 Total 24-h energy intake varied only moderately between NES and non-NES individuals in both studies, although NES subjects consumedTable 3.AuthorPrevalence of night eating symptoms in adults (unless otherwise stated) Year Population Degree of overweight Mean BMI (kg m ?2) BMI 430 68 Overweight Normal weight Normal weight Morbidly obese 24.9 52 37.8 35.3 35.5 53.4 55 40 36.5 41.1 43.5 10 15.8 (Mean 51st percentilea) 50.4 32 44.3 37.2 26.6b N Prevalence ( )Stunkard1 Kuldau5 Rand6 Stunkard7 Powers16 Aronoff17 Ceru-Bjork12 Gluck13 Napolitano18 Adami14 Anderson68 Lamerz40 Allison19 Morse22 Colles15 Lundgren21 Root1955 1986 1993 1996 1999 2001 2001 2001 2001 2002 2004 2005 2006 2006 2008 2010Obesity OPD General population Pre obesity surgery General population Pre obesity surgery Self report BED Weight loss study BED subjects Obesity surgery Obesity OPD Obesity OPD Obesity OPD Obesity OPD Some BED subjects Obesity OPD General population (MONICA project) School children (range 5? years) Pre obesity surgery Diabetes 1 and 2 OPD Obesity OPD Psychiatric OPD General population (STAGE project)25 38 232 100 2097 255 102 79 40 116 110 194 76 83 166 2111 1979 215 714 129 6880 0 0.5 15 1.5 25 13.7 8.9 15 10 51 14 14 43 7.8 8 1.1 8.9/1.9 9.7 17.1 25 7.Abbreviations: BED, binge eating disorder; BMI, body mass index; OPD, outpatient department. aOn the basis of the german reference population. bHighest lifetime BMI.2012 Macmillan Publishers LimitedNutrition and DiabetesNight eating syndrome J Cleator et al4 food intake is consumed after the evening meal, although the definition of `evening meal’ continues to lack clarity, especially given cultural differences. Lundgren et al.Ons between central (suprachiasmatic nucleus) timing mechanisms and putative oscillators elsewhere in the central nervous system or periphery such as the stomach. Given that altered food intake timings could be causing the hormonal patterns, it is acknowledged that further studies with controlled meal times would be needed to establish cause and effect.2 Despite similarities in NES eating behaviour, considerable difference is noted between studies in the average amount consumed by NES individuals after the evening meal. Criteria up to 2003 required an intake of at least 50 , although most researchers considered this unnecessarily restrictive and relaxed this requirement downwards when recruiting for studies.22,27,28 Accurate estimation of daily dietary intake during verbal recall is difficult with some studies reporting a tendency for overestimation in NES participants.27,29 Individuals in one study verbally reported eating 51 of their daily energy intake after the evening meal but only recorded 34.9 in food diaries.29 Conversely under-reporting, particularly in overweight and obese individuals, is a common phenomenon with evidence of the degree of under-reporting in epidemiological studies ranging from 10 to 47 .30 Current NES guidelines suggest at least 25 ofBEHAVIOURAL AND CLINICAL CHARACTERISTICS A landmark study of NES in American females (mean BMI 28.5 kg m ?2) based on 1996 criteria showed NES and non-NES participants to have similar sleep onset, offset and duration times, but NES individuals woke on an average 3.6 times a night and snacked to return to sleep.23 A later American replication study (mean BMI 34.9 kg m ?2), using 2003 criteria, showed similar patterns, with the NES group waking on an average 1.5 times per night and eating during 74 of the awakenings.24,25 Total 24-h energy intake varied only moderately between NES and non-NES individuals in both studies, although NES subjects consumedTable 3.AuthorPrevalence of night eating symptoms in adults (unless otherwise stated) Year Population Degree of overweight Mean BMI (kg m ?2) BMI 430 68 Overweight Normal weight Normal weight Morbidly obese 24.9 52 37.8 35.3 35.5 53.4 55 40 36.5 41.1 43.5 10 15.8 (Mean 51st percentilea) 50.4 32 44.3 37.2 26.6b N Prevalence ( )Stunkard1 Kuldau5 Rand6 Stunkard7 Powers16 Aronoff17 Ceru-Bjork12 Gluck13 Napolitano18 Adami14 Anderson68 Lamerz40 Allison19 Morse22 Colles15 Lundgren21 Root1955 1986 1993 1996 1999 2001 2001 2001 2001 2002 2004 2005 2006 2006 2008 2010Obesity OPD General population Pre obesity surgery General population Pre obesity surgery Self report BED Weight loss study BED subjects Obesity surgery Obesity OPD Obesity OPD Obesity OPD Obesity OPD Some BED subjects Obesity OPD General population (MONICA project) School children (range 5? years) Pre obesity surgery Diabetes 1 and 2 OPD Obesity OPD Psychiatric OPD General population (STAGE project)25 38 232 100 2097 255 102 79 40 116 110 194 76 83 166 2111 1979 215 714 129 6880 0 0.5 15 1.5 25 13.7 8.9 15 10 51 14 14 43 7.8 8 1.1 8.9/1.9 9.7 17.1 25 7.Abbreviations: BED, binge eating disorder; BMI, body mass index; OPD, outpatient department. aOn the basis of the german reference population. bHighest lifetime BMI.2012 Macmillan Publishers LimitedNutrition and DiabetesNight eating syndrome J Cleator et al4 food intake is consumed after the evening meal, although the definition of `evening meal’ continues to lack clarity, especially given cultural differences. Lundgren et al.