Article

OBJECTIVE: To determine the validity and interobserver reliability of visual
observation to assess partial weight-bearing. DESIGN: Validation and
interobserver reliability study. SETTING: University medical center.
PARTICIPANTS: Patients (N=10) with a total hip arthroplasty operated 1 to 12
months prior to the study referred by 10 physical therapists (5 experienced and 5
inexperienced in training patients in partial weight-bearing). INTERVENTIONS: Not
applicable. MAIN OUTCOME MEASURES: The amount of weight-bearing assessed by
visual estimation (visual analog scale score) in percentage body weight (BW).
Actual weight-bearing (percentage BW) as measured with the Pedar Mobile system.
The mean difference (systematic error) between visual estimation and the Pedar
system and the SD of the differences (random error) were determined by the limits
of agreement (LOA) method with multiple observations per subject. The intraclass
correlation coefficient (ICC) was calculated as a measure for the interobserver
reliability. RESULTS: The mean difference +/- SD between visual observation and
the reference method was -9.5+/-20.1 percentage BW (95% confidence interval,
-24.0 to 5.0 percentage BW) with LOA ranging from -49.8 to 30.8 percentage BW.
The ICC was .57. The therapists' experience in partial weight-bearing training
had no effect on the mean difference (P=.349) between the 2 methods. CONCLUSIONS:
Visual observation is not a valid and reliable method to assess partial
weight-bearing.

Langue : ANGLAIS