Vincy Chan

Anxiety and Mood Disorders and Cannabis Use

Background: Cannabis use has been linked to anxiety and mood disorders (AMD) in clinical cases, but little research on this relationship has been reported at the epidemiological level. Objectives: We examined the relationship between self-reported frequency of cannabis use and risk for AMD in the general Ontario adult population. Methods: Data were based on the CAMH Monitor survey of Ontario adults from 2001 to 2006 (n = 14,531). AMD was assessed with the 12-item version of the General Health Questionnaire (GHQ12). Frequency of cannabis use within the past year was grouped into five categories: No use (abstainer), less than once a month but at least once a year, less than once a week but at least once a month, less than daily but at least once a week, almost every day to more than once a day. Logistic regression analysis of AMD and cannabis use was implemented while controlling for demographics and alcohol problems. Results: AMD was most common among heavy cannabis users (used almost every day or more) (18.1%) and lowest for abstainers (8.7%). Compared to abstainers, the risk of AMD was significantly greater for infrequent cannabis users (OR = 1.43) and heavy cannabis users (OR = 2.04) but not for those in between. Conclusion: These data provide epidemiological evidence for a link between both light and heavy cannabis use and AMD. Scientific Significance: Recognizing the comorbidity of heavy cannabis use and AMD should facilitate improved treatment efforts. Our results also suggest the possibility that, for some individuals, AMD may occur at relatively low levels of cannabis use.

Factors associated with discharge destination from acute care after acquired brain injury in Ontario, Canada

BackgroundThe aim of this paper is to examine factors associated with discharge destination after acquired brain injury in a publicly insured population using the Anderson Behavioral Model as a framework.MethodsWe utilized a retrospective cohort design. Inpatient data from provincial acute care records from fiscal years 2003/4 to 2006/7 with a diagnostic code of traumatic brain injury (TBI) and non-traumatic brain injury (nTBI) in Ontario, Canada were obtained for the study. Using multinomial logistic regression models, we examined predisposing, need and enabling factors from inpatient records in relation to major discharge outcomes such as discharge to home, inpatient rehabilitation and other institutionalized care.ResultsMultinomial logistic regression revealed that need factors were strongly correlated with discharge destinations overall. Higher scores on the Charlson Comorbidity Index were associated with discharge to other institutionalized care in the nTBI population. Length of stay and special care days were identified as markers for severity and were both strongly positively correlated with discharge to other institutionalized care and inpatient rehabilitation, compared to discharge home, in both nTBI and TBI populations. Injury by motor vehicle collisions was found to be positively correlated with discharge to inpatient rehabilitation and other institutionalized care for patients with TBI. Controlling for need factors, rural location was associated with discharge to home versus inpatient rehabilitation.ConclusionsThese findings show that need factors (Charlson Comorbidity Index, length of stay, and number of special care days) are most significant in terms of discharge destination. However, there is evidence that other factors such as rural location and access to supplemental insurance (e.g., through motor vehicle insurance) may influence discharge destination outcomes as well. These findings should be considered in creating more equitable access to healthcare services across the continuum of care.

Older adults with acquired brain injury: a population based study

BackgroundAcquired brain injury (ABI), which includes traumatic (TBI) and non-traumatic brain injury (nTBI), is a leading cause of death and disability worldwide. The objective of this study was to examine the trends, characteristics, cause of brain injury, and discharge destination of hospitalized older adults aged 65 years and older with an ABI diagnosis in a population with universal access to hospital care. The profile of characteristics of patients with TBI and nTBI causes of injury was also compared.MethodsA population based retrospective cohort study design with healthcare administrative databases was used. Data on acute care admissions were obtained from the Discharge Abstract Database and patients were identified using the International Classification of Diseases – Version 10 codes for Ontario, Canada from April 1, 2003 to March 31, 2010. Older adults were examined in three age groups – 65 to 74, 75 to 84, and 85+ years.ResultsFrom 2003/04 to 2009/10, there were 14,518 episodes of acute care associated with a TBI code and 51, 233 episodes with a nTBI code. Overall, the rate of hospitalized TBI and nTBI episodes increased with older age groups. From 2007/08 to 2009/10, the percentage of patients that stayed in acute care for 12 days or more and the percentage of patients with delayed discharge from acute care increased with age. The most common cause of TBI was falls while the most common type of nTBI was brain tumours. The percentage of patients discharged to long term care and complex continuing care increased with age and the percentage discharged home decreased with age. In-hospital mortality also increased with age. Older adults with TBI and nTBI differed significantly in demographic and clinical characteristics and discharge destination from acute care.ConclusionsThis study showed an increased rate of acute care admissions for both TBI and nTBI with age. It also provided additional support for falls prevention strategies to prevent injury leading to cognitive disability with costly human and economic consequences. Implications for increased numbers of people with ABI are discussed.

Estimating prevalence of anxiety and mood disorder in survey data using the GHQ12: Exploration of threshold values

Background and Objectives: Our study explored the validity of different threshold values on the 12-item version of the General Health Questionnaire (GHQ12) for estimating the prevalence of anxiety and mood disorders (AMD) in Ontario population survey data. a Funding and support: This research has been supported by funding from the Ontario Ministry of Health and Long-Term Care. The views expressed here do not necessarily reflect those of the Ministry. 82 ROBERT E. MANN ET AL.

Older Adults with Acquired Brain Injury: Outcomes After Inpatient Rehabilitation

Cette étude a examiné un profil basé sur la population des personnes âgées atteintes des lésions cérébrales acquises (LCA), et de leur résultats fonctionnels, en réadaptation en milieu hospitalier au Canada. Les personnes âgées de 65 ans et plus qui ont été admises en réadaptation en milieu hospitalier de soins aigus pour un traumatisme cranio-cérébrale (TCC) (n = 1 214) ou une lésion cérébrale non pas traumatique (nTCC) (n = 1 530) ont été identifiées en Ontario de 2003/04 à 2009/10. Les caractéristiques démographiques et cliniques et les notes fonctionnelles totales de l’instrument (FIM MD) ont eté examinées. On a utilisé le Base de données sur les congés des patients (BDCP) et le Système nationale d’information sur la réadaptation (SNIR). Les résultats ont montré que les personnes plus âgées atteintes d’un traumatisme cranio-cérébrale (TCC) présentaient un niveau d’indépendence fonctionelle plus élevé que celles sans TCC à l’admission et à la sortie. Cependant, les deux groupes ont faits des gains importants (p = .001) et similaires (p > .05). Nous concluons que les personnes âgées avec TCC et nTCC font des gains similaires de réadaptation en milieu hospitalier. L’incapacité fonctionnelle initiale plus faible des patients nTCC à l’admission et les profils cliniques différents offrent des implications pour la répartition des soins et des ressources cliniques.

Defining traumatic brain injury in children and youth using International Classification of Diseases version 10 codes: a systematic review protocol

BackgroundAlthough healthcare administrative data are commonly used for traumatic brain injury research, there is currently no consensus or consistency on using the International Classification of Diseases version 10 codes to define traumatic brain injury among children and youth. This protocol is for a systematic review of the literature to explore the range of International Classification of Diseases version 10 codes that are used to define traumatic brain injury in this population.Methods/designThe databases MEDLINE, MEDLINE In-Process, Embase, PsychINFO, CINAHL, SPORTDiscus, and Cochrane Database of Systematic Reviews will be systematically searched. Grey literature will be searched using Grey Matters and Google. Reference lists of included articles will also be searched. Articles will be screened using predefined inclusion and exclusion criteria and all full-text articles that meet the predefined inclusion criteria will be included for analysis. The study selection process and reasons for exclusion at the full-text level will be presented using a PRISMA study flow diagram. Information on the data source of included studies, year and location of study, age of study population, range of incidence, and study purpose will be abstracted into a separate table and synthesized for analysis. All International Classification of Diseases version 10 codes will be listed in tables and the codes that are used to define concussion, acquired traumatic brain injury, head injury, or head trauma will be identified.DiscussionThe identification of the optimal International Classification of Diseases version 10 codes to define this population in administrative data is crucial, as it has implications for policy, resource allocation, planning of healthcare services, and prevention strategies. It also allows for comparisons across countries and studies. This protocol is for a review that identifies the range and most common diagnoses used to conduct surveillance for traumatic brain injury in children and youth. This is an important first step in reaching an appropriate definition using International Classification of Diseases version 10 codes and can inform future work on reaching consensus on the codes to define traumatic brain injury for this vulnerable population.

A systematic review protocol for measuring comorbidity in inpatient rehabilitation for non-traumatic brain injury

BackgroundComorbidity can affect health-care utilization and outcomes, and the results and interpretation of risk adjustment studies that attempt to predict rehabilitation utilization and outcomes are influenced by the choice of comorbidity measurement. Although the identification of an appropriate measurement has been conducted in some populations and outcomes, this information is currently lacking for the non-traumatic brain injury (nTBI) population in inpatient rehabilitation settings. As such, this is a systematic review protocol to survey the methods used to measure comorbidities in the rehabilitation setting for patients with nTBI.Methods/designMEDLINE, MEDLINE In-Process, Embase, The Cochrane Database of Systematic Reviews, PsycINFO, and Health and Psychosocial Instruments will be systematically searched using the concepts ‘nTBI,’ ‘comorbidity,’ and ‘rehabilitation.’ Grey matters and the reference list of eligible articles will also be searched. Study selection will be performed independently by two reviewers based on predetermined eligibility criteria through two rounds of screening using, first, the title and abstract, followed by full-text. Extracted information will include study purpose, design, and setting; data source and type; outcomes variables; statistical methods; comorbidity measurement method, rationale, justification, or validation; and results involving comorbidity. The data will be tabulated and narratively synthesized. Meta-analyses will be performed if appropriate.Systematic review registrationThis protocol has not been registered with PROSPERO.DiscussionThis protocol provides a systematic method for surveying current practice as well as monitoring the progress on comorbidity measurement methodology and effects of comorbidity on rehabilitation outcomes for patients with nTBI. The selection of an appropriate comorbidity measurement method has implications for the interpretation of both descriptive and risk adjustment studies, and thus, the validity of evidence used to inform planning and delivery of services.

Factors associated with living setting at discharge from inpatient rehabilitation after acquired brain injury in Ontario, Canada.

OBJECTIVE This study examined factors associated with living setting of patients with acquired brain injury at discharge from inpatient rehabilitation. DESIGN Retrospective cohort design. SUBJECTS/PATIENTS Cohort of patients first identified in acute care with a diagnostic code of traumatic or non-traumatic brain injury who also subsequently received inpatient rehabilitation in Ontario, Canada for fiscal years 2003/2004 to 2005/2006. METHODS Using logistic regression, we examined predisposing, need and enabling factors associated with living settings at discharge from inpatient rehabilitation (home/other versus residential care). Acute care and inpatient rehabilitation data were used. RESULTS The majority of patients (83%) were discharged home after inpatient rehabilitation. Among ABI patients, those with longer lengths of stay and patients living alone and in non-home settings at admission were significantly more likely to be living in a residential care setting at discharge. Conversely, patients with higher total function scores from the FIMTM Instrument and those receiving informal support at discharge were significantly less likely to be living in a residential care setting at discharge. CONCLUSION Our findings suggest that informal support influences service utilization and provide evidence for its importance at discharge with respect to living in the community. Prior living arrangement and functional outcome at discharge significantly predicted discharge destination. Improving physical function and providing needed supports at discharge may be factors important to reduce the demand for residential care facilities.

Sex-Specific Predictors of Inpatient Rehabilitation Outcomes After Traumatic Brain Injury

OBJECTIVE To identify sex-specific predictors of inpatient rehabilitation outcomes among patients with a traumatic brain injury (TBI) from a population-based perspective. DESIGN Retrospective cohort study. SETTING Inpatient rehabilitation. PARTICIPANTS Patients in inpatient rehabilitation for a TBI within 1 year of acute care discharge between 2008/2009 and 2011/2012 (N=1730, 70% men, 30% women). INTERVENTIONS None. MAIN OUTCOME MEASURES Inpatient rehabilitation length of stay, total FIM score, and motor and cognitive FIM ratings at discharge. RESULTS Sex, as a covariate in multivariable linear regression models, was not a significant predictor of rehabilitation outcomes. Although many of the predictors examined were similar across men and women, sex-specific multivariable models identified some predictors of rehabilitation outcome that are specific for men and women; mechanism of injury (P<.0001) was a significant predictor of functional outcome only among women, whereas comorbidities (P<.0001) was a significant predictor for men only. CONCLUSIONS Predictors of outcomes after inpatient rehabilitation differed by sex, providing evidence for a sex-specific approach in planning and resource allocation for inpatient rehabilitation services for patients with TBI.

Patients With Brain Tumors: Who Receives Postacute Occupational Therapy Services?

Data on the utilization of occupational therapy among patients with brain tumors have been limited to those with malignant tumors and small samples of patients outside North America in specialized palliative care settings. We built on this research by examining the characteristics of patients with brain tumors who received postacute occupational therapy services in Ontario, Canada, using health care administrative data. Between fiscal years 2004-2005 and 2008-2009, 3,199 patients with brain tumors received occupational therapy services in the home care setting after hospital discharge; 12.4% had benign brain tumors, 78.2% had malignant brain tumors, and 9.4% had unspecified brain tumors. However, patients with benign brain tumors were older (mean age=63.3 yr), and a higher percentage were female (65.2%). More than 90% of patients received in-home occupational therapy services. Additional research is needed to examine the significance of these differences and to identify factors that influence access to occupational therapy services in the home care setting.