Table 3.

Comparison Between Types of Adverse Events and Reasons for Dropping Out of Studies Among Patients Who Exercised^a

Types of Adverse Events Reported	Reasons for Dropping Out of Study That Are Similar to Reported Adverse Events	Reasons for Dropout That Are Not Similar to Adverse Events
Back pain Hip pain Leg pain Falls/fractures Knee pain Muscle strain/soreness Swollen knees Varices Dizziness Osteoarthritis flare/pain Injury during strength training	Back pain Knee pain Neck pain Leg pain Wrist pain	Did not like type of exercise Bad general health Required joint injection Chlorine sensitivity Unable to attend sessions NSAID taken after allocation Heart problems Discontinued intervention—no reason

^a NSAID = nonsteroidal anti-inflammatory drug.