Context
The single-legged–squat test (SLST) and step-down test (SDT) are 2 functional performance tests commonly used to evaluate active people with nonarthritic hip pain and dysfunction. However, evidence to support the use of the SLST and SDT in this population is lacking.
Objective
To offer evidence of reliability and validity for the SLST and SDT in evaluating patients with nonarthritic hip pain.
Design
Cross-sectional study.
Setting
Orthopaedic surgeon's clinical office.
Patients or Other Participants
Forty-five patients (27 female and 18 male participants; age = 28.5 ± 10 years, height = 171.6 ± 10.1 cm, weight = 73.9 ± 15.2 kg, and body mass index = 25 ± 4.1) diagnosed with nonarthritic hip pain.
Main Outcome Measure(s)
Participants performed the SLST and SDT. Interrater reliability and validity of passive internal rotation of the hip, visual analog scale (VAS) scores, and hip outcome scores (HOSs) for limitations in activities of daily living and sport-related activities (SRAs) were collected.
Results
Interrater reliability was moderate to excellent for both the SLST (0.603–0.939) and SDT (0.745–0.943). Participants who passed or failed the SLST and SDT differed on the following measures: VAS for the SLST (F1,43 = 16.21, P < .001); VAS for the SDT (F1,43 = 13.41, P = .001); HOS-activities of daily living for the SLST (F1,40 = 5.15, P = .029); HOS-SRAs for the SLST (F1,40 = 7.48, P = .009); and HOS-SRAs for the SDT (F1,40 = 6.42, P = .015).
Conclusions
Our study offers evidence for the use of the SLST and SDT as reliable and valid functional performance tests in the evaluation of physical function for patients with nonarthritic hip pain.
Functional performance testing of the universal super absorbing air filters FSU 70 „Air by Corneliu”