How do people with knee osteoarthritis use osteoarthritis pain medications and does this change over time? Data from the Osteoarthritis Initiative

Table 5 Change in medication use by individuals between baseline and 36 months

	Proportion of baseline users (n/N)
Therapy type used in month prior to visit	Used at both BL and 36 months	Used at BL but not 36 months
Acetaminophen	40.6% (41/101)	59.4% (60/101)
Prescription NSAIDs	26.2% (17/65)	73.8% (48/65)
OTC NSAIDs	39.1% (84/215)	60.9% (131/215)
Coxibs	31.6% (25/79)	68.4% (54/79)
Opioids	29.2% (7/24)	70.8% (17/24)
Chondroitin and/or glucosamine	61.8% (214/346)	38.2% (132/346)

BL, baseline; Coxibs, COX-II inhibitors; NSAID, non-steroidal anti-inflammatory drug; OTC, over the counter.

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