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Bartel K, van Maanen A, Cassoff J, Friborg O, Meijer AM, Oort F, Williamson P, Gruber R, Knäuper B, Gradisar M. The short and long of adolescent sleep: the unique impact of day length. Sleep Med 2017; 38:31-36. [DOI: 10.1016/j.sleep.2017.06.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/23/2017] [Accepted: 06/23/2017] [Indexed: 11/29/2022]
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Bartel K, Williamson P, van Maanen A, Cassoff J, Meijer AM, Oort F, Knäuper B, Gruber R, Gradisar M. Protective and risk factors associated with adolescent sleep: findings from Australia, Canada, and The Netherlands. Sleep Med 2016; 26:97-103. [DOI: 10.1016/j.sleep.2016.07.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/28/2016] [Accepted: 07/28/2016] [Indexed: 11/25/2022]
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Abstract
PURPOSE To test the efficacy of an acute intervention derived from acceptance and commitment therapy (ACT) for increasing high-intensity constant work rate (CWR) cycle exercise tolerance in a group of low-active women age 18-45 yr. The secondary goals were to examine whether ACT would reduce perceived effort and improve in-task affect during exercise and increase postexercise enjoyment. METHODS In a randomized controlled trial, 39 women were randomized to either the experimental (using ACT-based cognitive techniques and listening to music during the CWR exercise tests) or a control group (listening to music during the CWR exercise tests). Before (CWR-1) and after the intervention (CWR-2), participants completed a CWR cycle exercise test at 80% of maximal incremental work rate (Wmax) until volitional exhaustion. RESULTS On average, ACT (n = 18) and control (n = 21) groups were matched for age, body mass index, weekly leisure activity scores, and Wmax (all P > 0.05). Exercise tolerance time (ETT) increased by 15% from CWR-1 to CWR-2 for the ACT group (392.05 ± 146.4 vs 459.39 ± 209.3 s; mean ± SD) and decreased by 8% (384.71 ± 120.1 vs 353.86 ± 127.9 s) for the control group (P = 0.008). RPE were lower (e.g., by 1.5 Borg 6-20 scale units at 55% of ETT, P ≤ 0.01) during CWR-2 in the ACT versus that in the control group. By contrast, ACT had no effect on in-task affect. Exercise enjoyment was higher after CWR-2 in the ACT group versus that in the control group (P < 0.001). CONCLUSIONS An acute ACT intervention increased high-intensity ETT and postexercise enjoyment and reduced perceived effort in low-active women. Further investigations of ACT as an effective intervention for enhancing the established health benefits of high-intensity exercise need to be provided.
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Affiliation(s)
- Elena Ivanova
- 1Department of Psychology, McGill University, Montreal, Quebec, CANADA; and 2Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, CANADA
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Cassoff J, Gruber R, Giles L, Karabachian L, Mangal M, Knäuper B. 19: The Motivating Teens to Sleep More Program Improves Sleep Hygiene Behaviours in High School Students. Paediatr Child Health 2015. [DOI: 10.1093/pch/20.5.e39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Paquin S, Cassoff J, Irving R, Lane E, Yung R, Gruber R. 35: Availability and Use of Electronic Media is Associated with Shorter Sleep Duration and Poorer Sleep Quality in School-Aged Children. Paediatr Child Health 2014. [DOI: 10.1093/pch/19.6.e35-34] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cassoff J, Knäuper B, Colagrosso E, Gruber R. 123: A Comparison of Actigraphic and Self-Reported Sleep Timing in Adolescents. Paediatr Child Health 2014. [DOI: 10.1093/pch/19.6.e35-121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ivanova E, Cassoff J, Cesare S, du Boulay M, Moliva D, Nelson L, Yung R, Jensen D, Knäuper B. Using Acceptance-based Techniques To Improve Exercise Tolerance And Affective Responses To High-intensity Exercise. Med Sci Sports Exerc 2014. [DOI: 10.1249/01.mss.0000493995.99938.1d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cassoff J, Rushani F, Gruber R, Knäuper B. Evaluating the effectiveness of the Motivating Teens To Sleep More program in advancing bedtime in adolescents: a randomized controlled trial. BMC Psychol 2014. [DOI: 10.1186/2050-7283-2-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Grunbaum A, Holcroft C, Heilpern D, Gladman S, Burstein B, Menard M, Al-Abbad J, Cassoff J, MacNamara E, Gordon PH, Szilagyi A. Dynamics of vitamin D in patients with mild or inactive inflammatory bowel disease and their families. Nutr J 2013; 12:145. [PMID: 24206944 PMCID: PMC3828424 DOI: 10.1186/1475-2891-12-145] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Accepted: 11/06/2013] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND 25(OH) vitamin D levels may be low in patients with moderately or severely active inflammatory bowel diseases (IBD: Crohn's disease and Idiopathic Ulcerative Colitis) but this is less clear in patients with mild or inactive IBD. Furthermore there is limited information of any family influence on 25(OH) vitamin D levels in IBD. As a possible risk factor we hypothesize that vitamin D levels may also be low in families of IBD patients. OBJECTIVES To evaluate 25[OH] vitamin D levels in patients with IBD in remission or with mild activity. A second objective is to evaluate whether there are relationships within IBD family units of 25[OH] vitamin D and what are the influences associated with these levels. METHODS Participants underwent medical history, physical examination and a 114 item diet questionnaire. Serum 25[OH] vitamin D was measured, using a radioimmunoassay kit, (replete ≥ 75, insufficient 50-74, deficient < 25-50, or severely deficient < 25 nmol/L). Associations between 25[OH] vitamin D and twenty variables were evaluated using univariate regression. Multivariable analysis was also applied and intrafamilial dynamics were assessed. RESULTS 55 patients and 48 controls with their respective families participated (N206). 25[OH] vitamin D levels between patients and controls were similar (71.2 ± 32.8 vs. 68.3 ±26.2 nmol/L). Vitamin D supplements significantly increased intake but correlation with serum 25[OH] vitamin D was significant only during non sunny months among patients. Within family units, patients' families had mean replete levels (82.3 ± 34.2 nmol/L) and a modest correlation emerged during sunny months between patients and family (r2 =0.209 p = 0.032). These relationships were less robust and non significant in controls and their families. CONCLUSIONS In patients with mild or inactive IBD 25[OH] vitamin D levels are less than ideal but are similar to controls. Taken together collectively, the results of this study suggest that patient family dynamics may be different in IBD units from that in control family units. However contrary to the hypothesis, intra familial vitamin D dynamics do not pose additional risks for development of IBD.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Andrew Szilagyi
- Gastroenterology, Jewish General Hospital, 3755 Cote Ste Catherine Rd, Room E177, Montreal, QC, Canada.
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Cassoff J, Knäuper B, Michaelsen S, Gruber R. School-based sleep promotion programs: Effectiveness, feasibility and insights for future research. Sleep Med Rev 2013; 17:207-14. [DOI: 10.1016/j.smrv.2012.07.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 07/16/2012] [Accepted: 07/17/2012] [Indexed: 11/12/2022]
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Abstract
OBJECTIVE To examine the impact of moderate sleep extension and restriction on child behavior in school. METHODS We conducted a randomized parallel group study to determine the impact of an experimental sleep extension (addition of 1 hour of sleep relative to baseline habitual sleep duration on weekdays) and experimental sleep restriction (elimination of 1 hour of sleep relative to baseline habitual sleep duration on weekdays) on child behavior in school. The primary outcome measures were scores on the Conners' Global Index Scale, as determined by teachers blinded to sleep status of the participants. A sample of 34 typically developing children aged 7 to 11 years with no reported sleep problems and no behavioral, medical, or academic issues participated in the study. RESULTS Our main findings were that (1) a cumulative extension of sleep duration of 27.36 minutes was associated with detectable improvement in Conners' Global Index-derived emotional lability and restless-impulsive behavior scores of children in school and a significant reduction in reported daytime sleepiness; and (2) a cumulative restriction of sleep of 54.04 minutes was associated with detectable deterioration on such measures. CONCLUSIONS A modest extension in sleep duration was associated with significant improvement in alertness and emotional regulation, whereas a modest sleep restriction had opposite effects.
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Affiliation(s)
- Reut Gruber
- Attention, Behavior and Sleep Laboratory, Douglas Mental Health University Institute, 6875 LaSalle Blvd, Verdun, Quebec H4H 1R3, Canada.
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Abstract
Attention-deficit/hyperactivity disorder (ADHD) is often associated with comorbid sleep disturbances. Sleep disturbances may be a risk factor for development of the disorder, a symptom of the disorder, or a comorbid condition affected by a similar psychopathology. Various studies have examined the impact of sleep deprivation on the presence/exacerbation of ADHD symptomology, as well as longitudinal and concurrent associations between different sleep disturbances and ADHD, yet the notion of sleep disturbances as a predecessor to ADHD remains unclear. As such, this review examines the evidence for sleep disturbances as a risk factor for the development of ADHD, as well as the mechanisms underlying the association between sleep patterns and ADHD. Additionally, clinical implications regarding the comorbid nature of sleep disturbances and ADHD will be considered.
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Affiliation(s)
- Jamie Cassoff
- Attention, Behavior and Sleep Lab, Douglas Mental Health University Institute, Montréal, Quebec, Canada ; McGill University, Montréal, Quebec, Canada
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Abstract
Psychological disorders, particularly mood disorders, such as unipolar depression, are often accompanied by comorbid sleep disturbances, such as insomnia, restless sleep, and restricted sleep duration. The nature of the relationship between unipolar depression and these sleep disturbances remains unclear, as sleep disturbance may be a risk factor for development, an initial manifestation of the disorder, or a comorbid condition affected by similar mechanisms. Various studies have examined the impact of sleep deprivation on the presence of (or exacerbation of) depressive symptoms, and have examined longitudinal and concurrent associations between different sleep disturbances and unipolar depression. This review examines the evidence for sleep disturbances as a risk factor for the development and presence of depression, as well as examining common underlying mechanisms. Clinical implications pertaining to the comorbid nature of various sleep patterns and depression are considered.
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Affiliation(s)
- Sabrina T Wiebe
- Attention, Behavior and Sleep Laboratory, Douglas Mental Health University Institute, Montréal; McGill University, Montréal, Quebec, Canada
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Gruber R, Cassoff J, Knäuper B. Sleep health education in pediatric community settings: rationale and practical suggestions for incorporating healthy sleep education into pediatric practice. Pediatr Clin North Am 2011; 58:735-54. [PMID: 21600352 DOI: 10.1016/j.pcl.2011.03.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This article offers practical ways to incorporate healthy sleep education into pediatric practice and discusses key questions, barriers, and strategies associated with such efforts. The rationale for incorporating healthy sleep education in pediatric practice settings is presented, and desirable features of sleep education programs that may be implemented in pediatric practice are identified. Potential barriers are reviewed and strategies offered to overcome these barriers, such as developing resources applicable to healthy sleep education and practical information for pediatricians. Key factors regarding effectiveness of such interventional programs and key points relevant to successful healthy sleep education in pediatric practice are highlighted.
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Affiliation(s)
- Reut Gruber
- Behavior and Sleep Lab, Douglas Mental Health University Institute, Verdun, Canada.
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Gruber R, Wiebe ST, Wells SA, Cassoff J, Monson E. Sleep and academic success: mechanisms, empirical evidence, and interventional strategies. Adolesc Med State Art Rev 2010; 21:522-x. [PMID: 21302859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Mounting evidence indicates that sleep is beneficial for learning, memory, attention, and academic success. However, the importance of sleep in these contexts has rarely been addressed in programs aimed at optimizing academic performance. This review aims to describe the role that sleep plays in processes pertaining to academic achievement. We first describe the basic sleep processes and their role with respect to cognitive and behavioral/emotional systems important for academic performance. We next review studies conducted to assess the association between sleep and academic performance, concluding by describing interventional programs being used to optimize sleep in the context of academic success.
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Affiliation(s)
- Reut Gruber
- Department of Psychiatry, Douglas Mental Health University Institute, Montreal, Quebec, Canada.
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Partap VA, Cassoff J, Glikstein R. US-guided percutaneous thrombin injection: a new method of repair of superficial temporal artery pseudoaneurysm. J Vasc Interv Radiol 2000; 11:461-3. [PMID: 10787204 DOI: 10.1016/s1051-0443(07)61378-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- V A Partap
- Department of Diagnostic Radiology, Montreal General Hospital, Quebec, Canada.
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Partap VA, Cassoff J. Ultrasound-guided percutaneous thrombin injection for treatment of femoral pseudoaneurysms: technical note. Can Assoc Radiol J 1999; 50:182-4. [PMID: 10405652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023] Open
Affiliation(s)
- V A Partap
- Department of Diagnostic Radiology, Montreal General Hospital, Que.
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Bloom C, Hamilton P, Cassoff J, Pinsky M, Rosenbloom M, Sabloff B, Arenson AM, Hickey N, Lisbona A. Scrotal ultrasonography: a pictorial essay. Can Assoc Radiol J 1998; 49:12-20. [PMID: 9494459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- C Bloom
- Department of Radiology, Sunnybrook Health Science Centre, North York, Ont
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Dorne H, Hyams B, Cassoff J. Ultrasonographically indeterminate renal parapelvic masses. J Can Assoc Radiol 1984; 35:283-6. [PMID: 6389565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Ultrasonography is excellent in the evaluation of renal masses. Simple cysts can be distinguished from more complex or solid renal masses. Rarely, sonographic examination cannot be used to categorize renal masses, particularly those that are small and in a parapelvic location. We report six patients having sonographically indeterminate parapelvic masses. Subsequent computed tomographic examination demonstrated each of these masses to be a parapelvic cyst. Failure to make an ultrasonographic diagnosis was thought to be due to their parapelvic location. Complex interactions between cyst and normal renal sinus structures caused alteration and distortion of the anatomy of both, making exact diagnosis difficult. Computed tomography can be used to define the anatomy precisely and provide the correct diagnosis.
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Cassoff J, Collin G. Ultrasound findings in small bowel infarction. J Can Assoc Radiol 1979; 30:180-1. [PMID: 468882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A patient with small bowel infarction was studied using grey-scale ultrasound. The appearance was that of a lobulated abdominal mass consisting of smaller masses with a central sonolucent area and a peripheral echogenic rind. This is the reverse of what has been described in intramural intestinal hematoma, intussusception, and inflammatory and neoplastic bowel masses.
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Lisbona R, Cassoff J, Angtuaco E, Satin R. Comparative accuracy and complementary use of 67Ga-citrate imaging and ultrasound in the diagnosis of abdominal abscesses. Clin Nucl Med 1979; 4:108-10. [PMID: 428161 DOI: 10.1097/00003072-197903000-00005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ultrasound and 67Ga-citrate imaging were used simultaneously for the evaluation of 26 suspected cases of abdominal abscess. Scintiscanning and ultrasonography identified respectively 92% and 69% of the abscesses. Jointly, both modalities detected all 13 abscesses and we suggest an integrated approach in the evaluation of such cases.
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Cassoff J, Hanna T. Grey-scale ultrasonography for assessment of gynecologic pelvic masses. Can Med Assoc J 1979; 120:38-40, 45-6. [PMID: 761130 PMCID: PMC1818832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In a retrospective study the grey-scale ultrasonographic appearance of pelvic masses was correlated with the surgical findings in 93 patients. Of the masses found at the time of laparotomy 95% had been detected preoperatively. In most instances useful information about size, consistency and location of the mass was provided by ultrasonography. Certain pathologic entities produce a characteristic sonographic appearance, but there is a wide overlap for others. Data obtained by history-taking and physical examination must be integrated with the sonographic findings for a correct diagnosis.
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Cassoff J, Lisbona R. Focal nodular hyperplasia of the liver--nucleographic and ultrasonic findings. J Can Assoc Radiol 1978; 29:199-200. [PMID: 210191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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