Syafaatin, Nofita, Sari, Diah, Suminar, Ervi, AND Widiharti, Widiharti. " The Correlation Between Age and Body Mass Index and The Incidence of Osteoarthritis in The Elderly at Outpatient Unit of PKU Muhammadiyah Sekapuk Hospital" Indonesian Vocational Research Journal [Online], Volume 2 Number 1 (30 December 2022)