ABSTRAK
Latar Belakang: Osteoartritis (OA) merupakan penyakit sendi degeneratif yangberkaitan dengan kerusakan kartilago sendi, paling sering mengenai sendi lutut.Gejala yang dominan adalah nyeri dan kelemahan otot yang menyebabkanpenurunan kapasitas fungsional. Kemampuan berjalan merupakan salah satukapasitas fungsional pada OA lutut yang dapat diukur dengan uji jalan. Penelitianini bertujuan untuk menilai kesahihan dan keandalan uji jalan 15 meter untukmengukur kapasitas fungsional pasien OA lutut. Metode: Desain studi potong lintang. Penelitian dilakukan terhadap 42 pasien OAlutut yang didapat secara konsekutif. Kapasitas fungsional subjektif dinilai dengankuesioner Indeks Lequesne. Kapasitas fungsional objektif dinilai mengunakan ujijalan 15 meter dengan mengukur kecepatan jalan. Penilaian uji kesahihanmenggunakan korelasi Pearson antara kecepatan jalan 15 meter dengan IndeksLequesne. Penilaian uji keandalan intrarater dan inter-rater menggunakanIntraclass Correlation Coefficient (ICC). Hasil: Didapatkan korelasi negatif kuat bermakna antara kecepatan jalan 15 meterdengan Indeks Lequesne (r= -0,62, p=0,000). Nilai keandalan intrarater ICC 0,990(Rentang kepercayaan 95% 0,981-0,995, p= 0,000). Nilai keandalan inter-raterICC 0,999 (Rentang kepercayaan 95% 0,998-0,999, p= 0,000). Simpulan: Uji jalan 15 meter terbukti sahih dan andal untuk mengukur kapasitas fungsional pasien OA lutut.

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ABSTRACT
Background: Osteoarthritis (OA), a degenerative joint disease, is associated with a breakdown of cartilage in the joints, with the knee being the most commonlyaffected joint. Symptoms include pain and muscle weakness which causedeclining functional capacity. Walking ability, one of the functional capacities ofpatients with knee OA, is measurable using walk test. The aim of the study was tolook at the validity and reliability of 15-meter walk test to measure the functionalcapacity of patients with OA of the knee. Methods: The study was a cross sectional study which looked at 42 consecutiveknee OA patients. Functional capacity of these patients were evaluatedsubjectively using Lequesne Index questionnaire. In addition, functional capacitywas measured objectively using 15-meter walk test by measuring their walkingspeed. Validity was evaluated using Pearson correlation coefficient between the15-meter walk test and Lequesne Index questionnaire. Intrarater and inter-raterreliability was assessed using Intraclass Correlation Coefficient (ICC). Results: There was a significant negative correlation between 15-meter walk testand Lequesne Index questionnaire (r= -0,62, p=0,000). Intrarater ICC reliabilityscore 0,990 (95% confidence interval 0,981-0,995, p=0,000). Inter-rater ICCreliability score 0,999 (95% confidence interval 0,998-0,999, p=0,000). Conclusions: 15-meter walk test was proven to be valid and reliable to assess the functional capacity of patients with OA of the knee.