Date of Award
Spring 5-1989
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Community & Environmental Health
Program/Concentration
Community Health Education
Committee Director
Gregory M. Frazer
Committee Member
John L. Echternach
Committee Member
Martha Walker
Call Number for Print
Special Collections LD4331.C48G78
Abstract
Various methods of measuring the Q-angle are reported in the literature. The reliability of these measurement methods has not been established. The purpose of this study was to examine the intra- and inter-tester reliability of a method for measuring the Q-angle using a goniometer. The measurement method was performed on 40 normal, healthy subjects who volunteered to participate in the study. There were 27 female subjects and 13 male subjects.
Two physical therapists (Tester 1 and Tester 2) took repeated Q-angle measurements. Measurements were taken on the same day with an interval of five to 10 minutes between measurements. Measurements were also taken with a one to two week time lapse between trials. The testers measured the Q-angles using blinded goniometers. Assistants read and recorded the measurements.
Intra-class correlation coefficients (ICCs) were used to determine the degree of agreement between repeated measurements taken by the same tester and between measurements taken by the two testers. The ICC values for intratester reliability of Tester 1 were .87 for measurements taken five to 10 minutes apart and .56 for measurements taken one to two weeks apart. The ICC values for intra-tester reliability of Tester 2 were .81 for measurements taken five to 10 minutes apart and . 76 for measurements taken one week apart. Results of the ICC for inter-tester reliability was .11.
The ICC for measurements, taken five to 10 minutes apart, indicate good intra-tester reliability for both Tester 1 and Tester 2. Results of the ICC for repeated measurements taken one to two weeks apart indicate fair to poor intratester reliability. Results of the ICC between the two testers indicate very poor inter-tester reliability. Further studies on the Q-angle are recommended.
Rights
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DOI
10.25777/pb24-b376
Recommended Citation
Grusheski, Elisabeth A..
"Reliability of Q-Angle Measurement"
(1989). Master of Science (MS), Thesis, Community & Environmental Health, Old Dominion University, DOI: 10.25777/pb24-b376
https://digitalcommons.odu.edu/commhealth_etds/17