Risk Factors for Falls in Residential Care: Evidence from RAI … · 2011-08-18 · Risk Factors...
Transcript of Risk Factors for Falls in Residential Care: Evidence from RAI … · 2011-08-18 · Risk Factors...
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Risk Factors for Falls in Residential Care: Evidence from RAI MDS 2.0 Assessment Data
Jeff Poss, PhDDepartment of Health Studies & Gerontology
University of Waterloo
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Outline• Gentle review of MDS 2.0• Issues in studying falls in MDS 2.0 data• Examination of risk factors• Scott fall risk screening tool• Results in different jurisdictions
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Some Observations About FallsNiagara Falls, Ontario
drop 57mNiagara Falls, Goldstream Park, BC
drop 48mDella Falls, BC
drop 440m
• The height of the drop may not be the most important thing
• The importance of the fall may depend on who sees it
• Two people can call a fall the same thing but mean something quite different
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RAI Instruments and interRAI• interRAI is a non-profit collaborative network of researchers
from over 30 countries• Develop standardized assessment instruments in the support
of evidence-based clinical practice and policy decisions• MDS 2.0 – residential care settings• RAI-HC – home care• RAI-MH – inpatient psychiatry• etc.
• www.interrai.org
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Applications of interRAI Instruments
Assessment
Care Plan
Outcome Measures Quality Indicators
Resource Allocation
Prevent GamingEvaluateBest Practices
FundingNeed Determination
Report CardsQuality Improvement
Accreditation
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Canadian Institute for Health Information (CIHI)
• “an independent, not-for-profit organization that provides essential data and analysis on Canada’s health system and the health of Canadians”
• Continuing Care Reporting System (CCRS) uses MDS 2.0• Jurisdictions submit MDS 2.0 data to CIHI, get support,
reports, etc.• Anonymized MDS 2.0 data come back to interRAI for:
• secondary research • new instrument development
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MDS 2.0 Assessment• Developed in the U.S. for the federal Centre for
Medicare and Medicaid Services, early 90s• About 400 items covering
cognition sensorymood behaviourpsychosocial ADLcontinence disease diagnoseshealth conditions oral/nutritional/dentalskin activitiesmedications treatments
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Standardized Measurement• Strives to measure with reliability and validity• Specific time frames• Documentation, training to support assessors• Assessors use all available sources• Supports comparisons across:
• time• units/facilities• provinces• countries
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Example MDS 2.0 items
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Are the Data OK?• Entry software supports completeness, valid responses• CIHI checks at submission• Analyses suggest there is good internal consistency,
convergent validity• When used for research, accept some level of imprecision
• Bias threatens validity, but unlikely in MDS data
• No measurement is perfect, especially in healthcare!
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Instrumentation Issues: falls• MDS 2.0 has 2 fall items:
• Reassessment occurs quarterly: ~ 90 days• For data analysis, how to best determine when a
fall may have occurred?• Additional issue of determining if the fall occurred
in the facility or prior to entry
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Normal MDS assessment pattern
30150
14 105 196 287 378Day of stay in facility
Issues to consider in identifying day of first fall event:- Principle of conservatism: certain that fall occurred in facility (LOS>30 days for J4a, LOS>180 days for J4b)- Don’t know exactly when fall occurred, so assign mid-point day in possible interval- Take all possible events, choose earliest one for time-to-event analysis- ‘Under-detecting’ falls early in stay due to conservative approach
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‘Survival’ Plot for new admissions(Ontario LTC Homes, 2005-2008, CCRS, falls)
Proportion without a fall
Interpretation: 25% of residents experience a fall in a facility within 130 days of admission
Day of stay
Artifacts of periodic reassessment
Under-detection early in stay
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Can compare falls for 2 groups
Ontario
Saskatchewan
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Relative Risk• Expressed as a number, gives the degree to
which a group has higher risk of falling, compared to another group
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Can compare falls for 2 groups
OntarioRelative Risk = 1.39
Saskatchewan(baseline, relative
risk=1.00 by definition)
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Fun With Data
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Fell in last 30 days
Relative Risk = 2.76
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Fell in last 31-180 days
Relative Risk = 1.59
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Unsteady Gait
Relative Risk = 1.78
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Age
Relative Risk< 65: 1.0065-74: 1.1075-84: 1.2885+: 1.47
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Sex
Relative Risk: 1.13(males higher risk)
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Relative Risk = 1.21
Visually Impaired (D1 > 2)
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Depression Symptoms (DRS > 3)
Relative Risk: 1.24
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Physical Dependence (ADL)
Relative Risk: dependenceLow: 1.00Moderate: 1.75High: 1.19
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Cognitive Impairment
Relative Risk: CPS ScaleLow (0,1): 1.00Moderate (2,3,4,5): 1.43High (6): 0.86
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DIAGNOSES?
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Arthritis?
Relative Risk: 1.02 (n/s)
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Osteoporosis?
Relative Risk: 1.18
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Relative Risk: 1.27
Dementia?
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Relative Risk: 1.30
Parkinson’s?
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Relative Risk: 0.99 (n/s)
Stroke?
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Relative Risk: 1.61
Diabetic retinopathy?
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OTHERS
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Relative Risk: 1.45
Cane, walker, or crutch
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Relative Risk: 0.49 (protective)
Lifted mechanically
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Factor Relative RiskFell last 30 days 2.76Fell last 31 to 180 days 1.59Unsteady gait 1.78Age >85 vs <65 1.47Male 1.13Visually impaired 1.21Depressive symptoms 1.24ADL (moderate versus independent) 1.75Cognitive (moderate versus intact) 1.43Arthritis 1.02 (n/s)Osteoporosis 1.18Alzheimer’s/other dementia 1.27Parkinson’s 1.30Stroke 0.99 (n/s)Diabetic Retinopathy 1.61Cane/walker/crutch 1.45Lifted mechanically 0.49 (protective)
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SCOTT FALL RISK SCREENING TOOL for Residential Care
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Scott Fall Risk Screening Tool• 11 Risk factors:Factor Weight2+ falls last 6 months 6Impaired mobility, balance, gait 2Altered mental state 2Unsafely attempts to get out of bed 2Move to facility in past month 1Dizziness or vertigo 1Generalized weakness 1Alternations in urinary/bowel elimination 1More than 7 medications 1Benzodiazepine or psychotropic medications 2Immobile -5
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Scott Fall Risk Screening Tool• Attempt to ‘cross-walk’ these 11 factors to MDS
2.0 items• Test and refine using available data
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10 Factors, Ontario LTC, new admissions(Leave out ‘move to facility in last month’)
Factor PrevalenceRelative Risk
bi-variateRelative Risk, multi-variate
2+ falls 4.8% 2.54 2.37Mobility, balance, gait 70.8% 1.76 1.54Altered mental state 66.9% 1.27 1.16Unsafely out of bed 16.7% 1.27 1.26Dizziness/vertigo 2.2% 1.31 n/s Weakness 60.2% 1.19 1.15Incontinence 11.7% 1.60 1.287+ medications + criteria 51.4% 1.18 1.14Psychotropic meds 56.0% 1.16 n/s Immobile 31.0% 0.74 (protective) n/s
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Scott Risk Scale, 10 factorsFall in first 200 days
0%10%20%30%40%50%60%70%80%90%
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Scott Risk Scale, 7 significant factorsFall in first 200 days
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Scott Risk Scale, 7 factors, re-weightedFall in first 200 days
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Universal High High + unsafeambulation
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Scott Risk Scale, 7 factors, re-weightedFall in first 200 days
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Universal(38%)
High(57%)
High + unsafeambulation (5%)
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Scott Risk Scale, 7 factors, re-weightedFall in first 200 days
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Scott (7 factors), collapsed into 3 groups
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Scott Risk Scale, 7 significant itemsre-scaled, collapsed to 3 categories: Falls in Ontario LTC
homes, new admissions, n=9701
Relative RiskUniversal: 1.00High: 1.84High +: 3.89
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Scott Risk Scale, 7 significant itemsre-scaled, collapsed to 3 categories: Falls in Saskatchewan
homes, new admissions, n=9532
Relative RiskUniversal: 1.00High: 1.98High +: 5.14
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Scott Risk Scale, 7 significant itemsre-scaled, collapsed to 3 categories: Falls in Nova Scotia
homes, new admissions, n=446
Relative RiskUniversal: 1.00High: 1.71High +: 2.33
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Scott Risk Scale, 7 significant itemsre-scaled, collapsed to 3 categories: Falls in Ontario CCC
Hospitals, new admissions, n=122,502
Relative RiskUniversal: 1.00High: 1.94High +: 4.49
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Scott Risk Scale, 7 significant itemsre-scaled, collapsed to 3 categories: Fractures (J4c, J4d)
(Ontario, Saskatchewan, Nova Scotia combined)
Relative RiskUniversal: 1.00High: 1.97High +: 4.58
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Back to Ontario & Saskatchewan
OntarioAverage Scott risk
score: 4.5
SaskatchewanAverage Scott risk
score: 4.0
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Can Risk Adjust Falls• Ontario compared to Saskatchewan, relative risk:
• Unadjusted: 1.39• Adjusted for Scott risk tool: 1.29
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Discussion & Summary• MDS 2.0 assessment data demonstrate characteristics that
support examination of falls in residential care• Among MDS items, a recent fall is the most useful item in
predicting a future fall• Functional/clinical items generally better at predicting a future
fall than diagnoses• The Scott fall risk screening tool differentiates fall risk in
residential care• Can be used to identify residents with highest fall risk, target
interventions• Administratively, can monitor both falls and falls risk using
MDS 2.0 data
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Future work• B.C. Data• More Canadian MDS 2.0 data coming:
• Ontario finishing roll-out in LTC• Expect more western provincial data to CIHI/CCRS