Validity And Reliability Of Tri-Goniometric Method For Measuring Pelvic Tilt And Pelvic Range Of Motion In Standing Posture

The purpose of this study was to examine the validity and reliability of a test designed to measure the pelvic-tilt angle active posterior and anterior pelvic-tilt angles and ranges of motion and the total pelvic-tilt range of motion ROM in standing position. After an instruction session the pelvic-tilt angles of the both right and left side of 49 subjects were calculated using trigonometric functions. Ranges of motion were determined from the pelvic-tilt angles. Validity coefficients Pearson r for trigonometric measurements were .86 .90 for the standing pelvic-tilt angle .91 .93 for the anterior pelvic-tilt angle .86 .89 for the posterior pelvic-tilt angle and .89 .98 for the total ROM right and left side respectively. Reliability coefficients Pearson r for trigonometric measurements were .73 .82 for the standing pelvic-tilt angle .74 .68 for the anterior pelvic-tilt angle .76 .73 for the posterior pelvic-tilt angle and .88 .95 for the total ROM right and left side respectively. The factors may have influenced the validity and reliability of the measurements the clinical implications and limitations of the test.