Correlation of accelerometry with clinical balance tests in older fallers and non-fallers.

Hdl Handle:
http://hdl.handle.net/10147/207813
Title:
Correlation of accelerometry with clinical balance tests in older fallers and non-fallers.
Authors:
O'Sullivan, Maura; Blake, Catherine; Cunningham, Conal; Boyle, Gerard; Finucane, Ciaran
Affiliation:
Physiotherapy Department, Robert Mayne Day Hospital, St. James Hospital, Dublin, 8, Ireland. mauraosul@yahoo.ie
Citation:
Age Ageing. 2009 May;38(3):308-13. Epub 2009 Feb 28.
Journal:
Age and ageing
Issue Date:
1-Feb-2012
URI:
http://hdl.handle.net/10147/207813
DOI:
10.1093/ageing/afp009
PubMed ID:
19252205
Abstract:
BACKGROUND: falls are a common cause of injury and decreased functional independence in the older adult. Diagnosis and treatment of fallers require tools that accurately assess physiological parameters associated with balance. Validated clinical tools include the Berg Balance Scale (BBS) and the Timed Up and Go test (TUG); however, the BBS tends to be subjective in nature, while the TUG quantifies an individuals functional impairment but requires further subjective evaluation for balance assessment. Other quantitative alternatives to date require expensive, sophisticated equipment. Measurement of the acceleration of centre of mass, with relatively inexpensive, lightweight, body-mounted accelerometers is a potential solution to this problem. OBJECTIVES: to determine (i) if accelerometry correlates with standard clinical tests (BBS and TUG), (ii) to characterise accelerometer responses to increasingly difficult challenges to balance and (iii) to characterise acceleration patterns between fallers and non-fallers. Study design and setting: torso accelerations were measured at the level of L3 using a tri-axial accelerometer under four conditions; standing unsupported with eyes open (EO), eyes closed (EC) and on a mat with eyes open (MAT EO) and closed (MAT EC). Older patients (n = 21, 8 males, 13 females) with a mean age of 78 (SD +/- 7.6) years who attended a day hospital were recruited for this study. Patients were identified as fallers or non-fallers based on a comprehensive falls history. MEASUREMENTS: Spearman's rank correlation analysis examined the relationship between acceleration root mean square (RMS) data and the BBS while Pearson's correlation was used with TUG scores. Differences in accelerometer RMS between fallers and non-fallers and between test conditions were examined using t-test and non-parametric alternatives where appropriate. RESULTS: there was a stepwise increase in accelerometer RMS with increasing task complexity, and the accelerometer was able to distinguish significantly between sway responses to all test conditions except between EO and EC (P < 0.05). Acceleration data for MAT EO were significantly and inversely correlated with BBS scores (P = -0.829, P < 0.001) and positively correlated with TUG values (r = 0.621, P < 0.01). There was a significant difference in acceleration RMS for MAT EO between fallers and non-fallers (P < 0.011). CONCLUSIONS: this is the first study of its kind to show a high correlation between accelerometry, the BBS and TUG. Accelerometry could also distinguish between sway responses to differing balancing conditions and between fallers and non-fallers. Accelerometry was shown to be an efficient, quantitative alternative in the measurement of balance in older people.
Language:
eng
MeSH:
Acceleration; Accidental Falls/*prevention & control; Age Factors; Aged; Aged, 80 and over; Biomechanics; Female; Geriatric Assessment/*methods; Humans; Male; *Postural Balance; Predictive Value of Tests; Prospective Studies; Sensation Disorders/complications/*diagnosis/physiopathology
ISSN:
1468-2834 (Electronic); 0002-0729 (Linking)

Full metadata record

DC FieldValue Language
dc.contributor.authorO'Sullivan, Mauraen_GB
dc.contributor.authorBlake, Catherineen_GB
dc.contributor.authorCunningham, Conalen_GB
dc.contributor.authorBoyle, Gerarden_GB
dc.contributor.authorFinucane, Ciaranen_GB
dc.date.accessioned2012-02-01T10:45:26Z-
dc.date.available2012-02-01T10:45:26Z-
dc.date.issued2012-02-01T10:45:26Z-
dc.identifier.citationAge Ageing. 2009 May;38(3):308-13. Epub 2009 Feb 28.en_GB
dc.identifier.issn1468-2834 (Electronic)en_GB
dc.identifier.issn0002-0729 (Linking)en_GB
dc.identifier.pmid19252205en_GB
dc.identifier.doi10.1093/ageing/afp009en_GB
dc.identifier.urihttp://hdl.handle.net/10147/207813-
dc.description.abstractBACKGROUND: falls are a common cause of injury and decreased functional independence in the older adult. Diagnosis and treatment of fallers require tools that accurately assess physiological parameters associated with balance. Validated clinical tools include the Berg Balance Scale (BBS) and the Timed Up and Go test (TUG); however, the BBS tends to be subjective in nature, while the TUG quantifies an individuals functional impairment but requires further subjective evaluation for balance assessment. Other quantitative alternatives to date require expensive, sophisticated equipment. Measurement of the acceleration of centre of mass, with relatively inexpensive, lightweight, body-mounted accelerometers is a potential solution to this problem. OBJECTIVES: to determine (i) if accelerometry correlates with standard clinical tests (BBS and TUG), (ii) to characterise accelerometer responses to increasingly difficult challenges to balance and (iii) to characterise acceleration patterns between fallers and non-fallers. Study design and setting: torso accelerations were measured at the level of L3 using a tri-axial accelerometer under four conditions; standing unsupported with eyes open (EO), eyes closed (EC) and on a mat with eyes open (MAT EO) and closed (MAT EC). Older patients (n = 21, 8 males, 13 females) with a mean age of 78 (SD +/- 7.6) years who attended a day hospital were recruited for this study. Patients were identified as fallers or non-fallers based on a comprehensive falls history. MEASUREMENTS: Spearman's rank correlation analysis examined the relationship between acceleration root mean square (RMS) data and the BBS while Pearson's correlation was used with TUG scores. Differences in accelerometer RMS between fallers and non-fallers and between test conditions were examined using t-test and non-parametric alternatives where appropriate. RESULTS: there was a stepwise increase in accelerometer RMS with increasing task complexity, and the accelerometer was able to distinguish significantly between sway responses to all test conditions except between EO and EC (P < 0.05). Acceleration data for MAT EO were significantly and inversely correlated with BBS scores (P = -0.829, P < 0.001) and positively correlated with TUG values (r = 0.621, P < 0.01). There was a significant difference in acceleration RMS for MAT EO between fallers and non-fallers (P < 0.011). CONCLUSIONS: this is the first study of its kind to show a high correlation between accelerometry, the BBS and TUG. Accelerometry could also distinguish between sway responses to differing balancing conditions and between fallers and non-fallers. Accelerometry was shown to be an efficient, quantitative alternative in the measurement of balance in older people.en_GB
dc.language.isoengen_GB
dc.subject.meshAccelerationen_GB
dc.subject.meshAccidental Falls/*prevention & controlen_GB
dc.subject.meshAge Factorsen_GB
dc.subject.meshAgeden_GB
dc.subject.meshAged, 80 and overen_GB
dc.subject.meshBiomechanicsen_GB
dc.subject.meshFemaleen_GB
dc.subject.meshGeriatric Assessment/*methodsen_GB
dc.subject.meshHumansen_GB
dc.subject.meshMaleen_GB
dc.subject.mesh*Postural Balanceen_GB
dc.subject.meshPredictive Value of Testsen_GB
dc.subject.meshProspective Studiesen_GB
dc.subject.meshSensation Disorders/complications/*diagnosis/physiopathologyen_GB
dc.titleCorrelation of accelerometry with clinical balance tests in older fallers and non-fallers.en_GB
dc.contributor.departmentPhysiotherapy Department, Robert Mayne Day Hospital, St. James Hospital, Dublin, 8, Ireland. mauraosul@yahoo.ieen_GB
dc.identifier.journalAge and ageingen_GB
dc.description.provinceLeinster-

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