1. How to define worsening in osteoarthritis? Development and validation of preliminary criteria for clinically important worsening in knee and hip osteoarthritis. (April 2015) Authors: Mahler, E.; Broeder, A. den; Woodworth, T.; Busch, V.; Bijlsma, J.; van den Ende, C. Journal: Osteoarthritis and cartilage Issue: Volume 23(2015)Supplement 2 Page Start: A348 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗