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Psychometric properties of the original and short versions of the Falls Efficacy Scale-International (FES-I) in people with Parkinson's disease

Jonasson, Stina B. LU ; Nilsson, Maria H. LU and Lexell, Jan LU (2017) In Health and Quality of Life Outcomes 15(1). p.1-8
Abstract

Background: Fear of falling is common in people with Parkinson's disease (PD) and is associated with an increased risk for future falls, activity limitations and a reduced quality of life. The Falls Efficacy Scale-International (FES-I) assesses fear of falling conceptualized as concerns about falling. The original FES-I has good psychometric properties in people with PD, but whether this applies also for the short version of FES-I remains to be shown. The aim of the present study was to evaluate the psychometric properties of the short FES-I and to compare these with the original FES-I in the same sample of people with PD. The investigated psychometric properties included known groups validity, data completeness, scaling assumptions,... (More)

Background: Fear of falling is common in people with Parkinson's disease (PD) and is associated with an increased risk for future falls, activity limitations and a reduced quality of life. The Falls Efficacy Scale-International (FES-I) assesses fear of falling conceptualized as concerns about falling. The original FES-I has good psychometric properties in people with PD, but whether this applies also for the short version of FES-I remains to be shown. The aim of the present study was to evaluate the psychometric properties of the short FES-I and to compare these with the original FES-I in the same sample of people with PD. The investigated psychometric properties included known groups validity, data completeness, scaling assumptions, targeting and reliability. Methods: A postal survey, which included the original, full-length FES-I, was distributed to 174 people with PD. Responders received a second survey after two weeks. From these data, short FES-I total scores were calculated by extracting the items that are included in the short version of the scale. Results: Median age and PD duration of the 101 responders (43% women) were 73 and 5 years, respectively. The original as well as the short FES-I scores were able to discriminate (p < 0.001) between groups with and without fear of falling, activity avoidance, falls, near falls, and with various self-rated PD severity, respectively. Both versions of FES-I had a high level of data completeness (0.7 to 0.9% missing item responses). Scaling assumptions were acceptable for the original as well as the short FES-I. While the short FES-I had 19% floor effect, the original version was better targeted. Both versions were reliable and obtained high values for internal consistency (Cronbach's alpha >0.8) and test-retest reliability (Intraclass Correlation Coefficient > 0.9). Conclusions: Both the original and short FES-I revealed generally good psychometric properties in people with PD, although the original scale was better targeted. Due to the higher floor effect in the short FES-I, the present findings favors using the original, full-length FES-I in longitudinal follow-ups, intervention studies and clinical practice when addressing concerns about falling.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Concerns about falling, Parkinson disease, Psychometrics, Reliability of results
in
Health and Quality of Life Outcomes
volume
15
issue
1
pages
1 - 8
publisher
BioMed Central
external identifiers
  • scopus:85020025067
  • wos:000402680100001
ISSN
1477-7525
DOI
10.1186/s12955-017-0689-6
language
English
LU publication?
yes
id
f390cf48-9635-481c-b383-5987f7b30115
date added to LUP
2017-06-21 14:12:07
date last changed
2018-01-07 12:08:34
@article{f390cf48-9635-481c-b383-5987f7b30115,
  abstract     = {<p>Background: Fear of falling is common in people with Parkinson's disease (PD) and is associated with an increased risk for future falls, activity limitations and a reduced quality of life. The Falls Efficacy Scale-International (FES-I) assesses fear of falling conceptualized as concerns about falling. The original FES-I has good psychometric properties in people with PD, but whether this applies also for the short version of FES-I remains to be shown. The aim of the present study was to evaluate the psychometric properties of the short FES-I and to compare these with the original FES-I in the same sample of people with PD. The investigated psychometric properties included known groups validity, data completeness, scaling assumptions, targeting and reliability. Methods: A postal survey, which included the original, full-length FES-I, was distributed to 174 people with PD. Responders received a second survey after two weeks. From these data, short FES-I total scores were calculated by extracting the items that are included in the short version of the scale. Results: Median age and PD duration of the 101 responders (43% women) were 73 and 5 years, respectively. The original as well as the short FES-I scores were able to discriminate (p &lt; 0.001) between groups with and without fear of falling, activity avoidance, falls, near falls, and with various self-rated PD severity, respectively. Both versions of FES-I had a high level of data completeness (0.7 to 0.9% missing item responses). Scaling assumptions were acceptable for the original as well as the short FES-I. While the short FES-I had 19% floor effect, the original version was better targeted. Both versions were reliable and obtained high values for internal consistency (Cronbach's alpha &gt;0.8) and test-retest reliability (Intraclass Correlation Coefficient &gt; 0.9). Conclusions: Both the original and short FES-I revealed generally good psychometric properties in people with PD, although the original scale was better targeted. Due to the higher floor effect in the short FES-I, the present findings favors using the original, full-length FES-I in longitudinal follow-ups, intervention studies and clinical practice when addressing concerns about falling.</p>},
  articleno    = {116},
  author       = {Jonasson, Stina B. and Nilsson, Maria H. and Lexell, Jan},
  issn         = {1477-7525},
  keyword      = {Concerns about falling,Parkinson disease,Psychometrics,Reliability of results},
  language     = {eng},
  month        = {05},
  number       = {1},
  pages        = {1--8},
  publisher    = {BioMed Central},
  series       = {Health and Quality of Life Outcomes},
  title        = {Psychometric properties of the original and short versions of the Falls Efficacy Scale-International (FES-I) in people with Parkinson's disease},
  url          = {http://dx.doi.org/10.1186/s12955-017-0689-6},
  volume       = {15},
  year         = {2017},
}