Abstract
Objective
To evaluate the interobserver reliability of the Short Physical Performance Battery
(SPPB) and hand dynamometry when measuring isometric muscle strength in people with
chronic obstructive pulmonary disease (COPD).
Design
Reliability study. Each patient was assessed by a pulmonology physician and a physical
therapist in 2 separate sessions 7 to 14 days apart (mean, 9.8±0.8d). Each rater was
blinded to the other's results.
Setting
Pneumology unit of a public hospital.
Participants
Random sample of outpatients with stable COPD (N=30).
Interventions
Not applicable.
Main Outcome Measures
SPPB and muscle strength (kg) using electronic handgrip and handheld dynamometers.
Reliability was assessed with intraclass correlation coefficients (ICCs), standard
error of measurement values, and Bland-Altman plots. ICCs were calculated for the
SPPB summary score and for its 3 subscales.
Results
The ICCs for the overall reliability of the SPPB summary score and for grip and quadriceps
strength were .82 (95% confidence interval [CI], .62–.91), .97 (95% CI, .93–.98),
and .76 (95% CI, .49–.88), respectively. The standard error of measurement values
were .55 points, 1.30kg, and 1.22kg, respectively. The mean differences between the
rater's scores were near zero for grip strength and SPPB summary score measures. The
ICCs for the SPPB subscales were .84 (95% CI, .66–.92) for the chair subscale, .75
(95% CI, .48–.88) for gait, and .33 (95% CI, −.42 to .68) for balance.
Conclusions
Interobserver reliability was good for quadriceps and handgrip dynamometry and for
the SPPB summary score and its chair stand and gait speed subscales. Both pulmonary
physicians and physical therapists can obtain and exchange the scores. Because the
reliability of the balance subscale was questionable, it is better to use the SPPB
summary score.
Keywords
List of abbreviations:
BMI (body mass index), CI (confidence interval), COPD (chronic obstructive pulmonary disease), HHD (handheld dynamometer), ICC (intraclass correlation coefficient), SPPB (Short Physical Performance Battery)To read this article in full you will need to make a payment
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Article Info
Publication History
Published online: May 31, 2016
Footnotes
Disclosures: All authors had editorial and writing assistance provided by Medical Manager of AstraZeneca Pharmaceutical Spain S.A, Pfizer, and Menarini.
Identification
Copyright
© 2016 by the American Congress of Rehabilitation Medicine
