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Table 5 Withdrawal and harmful events during the study

From: Intra-articular hyaluronic acid injection versus oral non-steroidal anti-inflammatory drug for the treatment of knee osteoarthritis: a multi-center, randomized, open-label, non-inferiority trial

Withdrawn Completed Withdrawn Frequency (%) P
IA-HA (n = 99) 90 9 9.1 0.026
NSAID (n = 93) 74 19 20.4  
Harmful events Not occurred Occurred Frequency (%) P
IA-HA (n = 99) 98 1 1.0 0.004
NSAID (n = 93) 83 10 10.8  
  1. IA, intra-articular; HA, hyaluronic acid; NSAID, non-steroidal anti-inflammatory drug.