Mark Theodore Bayley

Dr. Mark Theodore Bayley

orcid

Research Focus & Metrics

Academic Career Length

40Years (1987-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 April 2016 in International Journal of Stroke
Verified
Journal Article
Open access
DHDebbie Hebert
Debbie Hebert
MLM Patrice Lindsay
M Patrice Lindsay
AMAmanda McIntyre
Amanda McIntyre
AKAdam Kirton
Adam Kirton
PRPeter G Rumney
Peter G Rumney
RTRobert Teasell
Robert Teasell
Stroke rehabilitation is a progressive, dynamic, goal-orientated process aimed at enabling a person with impairment to reach their optimal physical, cognitive, emotional, communicative, social and/or functional activity level. After a stroke, patients often continue to require rehabilitation for persistent deficits related to spasticity, upper and lower extremity dysfunction, shoulder and central pain, mobility/gait, dysphagia, vision, and communication. Each year in Canada 62,000 people experience a stroke. Among stroke survivors, over 6500 individuals access in-patient stroke rehabilitation and stay a median of 30 days (inter-quartile range 19 to 45 days). The 2015 update of the Canadian Stroke Best Practice Recommendations: Stroke Rehabilitation Practice Guidelines is a comprehensive summary of current evidence-based recommendations for all members of multidisciplinary teams working in a range of settings, who provide care to patients following stroke. These recommendations have been developed to address both the organization of stroke rehabilitation within a system of care (i.e., Initial Rehabilitation Assessment; Stroke Rehabilitation Units; Stroke Rehabilitation Teams; Delivery; Outpatient and Community-Based Rehabilitation), and specific interventions and management in stroke recovery and direct clinical care (i.e., Upper Extremity Dysfunction; Lower Extremity Dysfunction; Dysphagia and Malnutrition; Visual-Perceptual Deficits; Central Pain; Communication; Life Roles). In addition, stroke happens at any age, and therefore a new section has been added to the 2015 update to highlight components of stroke rehabilitation for children who have experienced a stroke, either prenatally, as a newborn, or during childhood. All recommendations have been assigned a level of evidence which reflects the strength and quality of current research evidence available to support the recommendation. The updated Rehabilitation Clinical Practice Guidelines feature several additions that reflect new research areas and stronger evidence for already existing recommendations. It is anticipated that these guidelines will provide direction and standardization for patients, families/caregiver(s), and clinicians within Canada and internationally.

19 May 2023 in Archives of Physical Medicine and Rehabilitation
Verified
Journal Article
Closed access
NSNoah D. Silverberg
Noah D. Silverberg
GIGrant L Iverson
Grant L Iverson
ACAlison Cogan
Alison Cogan
KDKristen Dams-O-Connor
Kristen Dams-O-Connor
RDRichard Delmonico
Richard Delmonico
RZRoger Zemek
Roger Zemek

12 May 2016 in New England Journal of Medicine
Verified
Journal Article
Closed access
PDF file
JCJill I. Cameron
Jill I. Cameron
LCLeslie M. Chu
Leslie M. Chu
AMAndrea Matte
Andrea Matte
GTGeorge A. Tomlinson
George A. Tomlinson
LCLinda Chan
Linda Chan
MHMargaret S. Herridge
Margaret S. Herridge
Few resources are available to support caregivers of patients who have survived critical illness; consequently, the caregivers’ own health may suffer. We studied caregiver and patient characteristics to determine which characteristics were associated with caregivers’ health outcomes during the first year after patient discharge from an intensive care unit (ICU). We prospectively enrolled 280 caregivers of patients who had received 7 or more days of mechanical ventilation in an ICU. Using hospital data and self-administered questionnaires, we collected information on caregiver and patient characteristics, including caregiver depressive symptoms, psychological well-being, health-related quality of life, sense of control over life, and effect of providing care on other activities. Assessments occurred 7 days and 3, 6, and 12 months after ICU discharge. The caregivers’ mean age was 53 years, 70% were women, and 61% were caring for a spouse. A large percentage of caregivers (67% initially and 43% at 1 year) reported high levels of depressive symptoms. Depressive symptoms decreased at least partially with time in 84% of the caregivers but did not in 16%. Variables that were significantly associated with worse mental health outcomes in caregivers were younger age, greater effect of patient care on other activities, less social support, less sense of control over life, and less personal growth. No patient variables were consistently associated with caregiver outcomes over time. In this study, most caregivers of critically ill patients reported high levels of depressive symptoms, which commonly persisted up to 1 year and did not decrease in some caregivers. (Funded by the Canadian Institutes of Health Research and others; ClinicalTrials.gov number, NCT00896220.)

1 October 2016 in American Journal of Respiratory and Critical Care Medicine
Verified
Journal Article
Closed access
MHMargaret S. Herridge
Margaret S. Herridge
LCLeslie M. Chu
Leslie M. Chu
AMAndrea Matte
Andrea Matte
GTGeorge A. Tomlinson
George A. Tomlinson
LCLinda Chan
Linda Chan
JCJill I. Cameron
Jill I. Cameron
Rationale: Disability risk groups and 1-year outcome after greater than or equal to 7 days of mechanical ventilation (MV) in medical/surgical intensive care unit (ICU) patients are unknown and may inform education, prognostication, rehabilitation, and study design. Objectives: To stratify patients for post-ICU disability and recovery to 1 year after critical illness. Methods: We evaluated a multicenter cohort of 391 medical/surgical ICU patients who received greater than or equal to 1 week of MV at 7 days and 3, 6, and 12 months after ICU discharge. Disability risk groups were identified using recursive partitioning modeling. Measurements and Main Results: The 7-day post-ICU Functional Independence Measure (FIM) determined the recovery trajectory to 1-year after ICU discharge and was an independent risk factor for 1-year mortality. The 7-day post-ICU FIM was predicted by age and ICU length of stay. By 2 weeks of MV, ICU patients could be stratified into four disability groups characterized by increasing risk for post ICU disability, ICU and post-ICU healthcare use, and disposition. Patients less than 42 years with ICU length of stay less than 2 weeks had the best function and fewest deaths at 1 year compared with patients greater than 66 years with ICU length of stay greater than 2 weeks who sustained the worst disability and 40% 1-year mortality. Depressive symptoms (17%) and post-traumatic stress disorder (18%) persisted at 1 year. Conclusions: ICU survivors of greater than or equal to 1 week of MV may be stratified into four disability groups based on age and ICU length of stay. These groups determine 1-year recovery and healthcare use and are independent of admitting diagnosis and illness severity. Clinical trial registered with www.clinicaltrials.gov (NCT 00896220).

1 September 2016 in The Lancet Neurology
Verified
Journal Article
Closed access
GSGustavo Saposnik
Gustavo Saposnik
LCLeonardo G Cohen
Leonardo G Cohen
MMMuhammad Mamdani
Muhammad Mamdani
SPSepideth Pooyania
Sepideth Pooyania
MPMichelle Ploughman
Michelle Ploughman
MBMark Theodore Bayley
Mark Theodore Bayley

1 February 2009 in Stroke
Verified
Journal Article
Closed access
PDF file
RMRosemary Martino
Rosemary Martino
FSFrank Silver
Frank Silver
RTRobert Teasell
Robert Teasell
MBMark Theodore Bayley
Mark Theodore Bayley
GNGordon Nicholson
Gordon Nicholson
NDNicholas E. Diamant
Nicholas E. Diamant
Background and Purpose— Dysphagia occurs in 55% of all acute stroke patients. Early identification of dysphagia from screening can lead to earlier treatments and thereby reduce complications. We designed and validated a new bedside dysphagia screening tool—the Toronto Bedside Swallowing Screening Test (TOR-BSST) for stroke survivors in acute and rehabilitative settings. Methods— The TOR-BSST initially contained 5 items with proven high predictive ability for dysphagia. Trained screeners administer and score the TOR-BSST in less than 10 minutes. Trained nurses from 2 acute and 2 rehabilitation facilities administered the TOR-BSST to consecutively admitted stroke inpatients. A positive screen identified patients at risk for dysphagia. Blinded repeat screenings were conducted within 24 hours. Test-retest reliability was established with the first 50 administrations at an ICC=0.92 (CI, 0.85 to 0.96). Items were eliminated if they contributed ≤5% to the total score and were judged clinically impractical. 20% of all enrolled patients were randomly allocated to gold standard videofluoroscopic assessment of swallowing and findings rated independently by 4 blinded experts. Adequate validity was set at sensitivity ≥90% and negative predictive value ≥90%. Results— 311 stroke inpatients were enrolled; 103 acute and 208 rehabilitation. Screening was positive in 59.2% acute and 38.5% rehabilitation patients. The pharyngeal sensation item did not meet inclusion criteria and was eliminated. The TOR-BSST demonstrated excellent validity with sensitivity at 91.3% (CI, 71.9 to 98.7), and negative predictive values at 93.3% in acute and 89.5% in rehabilitation settings. Conclusion— The TOR-BSST is a simple accurate tool to identify stroke patients with dysphagia regardless of severity and setting.