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Table 4

Evidence for osteoarthritis

ComparatorQualityPopulation sizeComplementary medicineSafetyCost-effectiveness
PlaceboGoodLargeAcupuncture*Some evidence of harmNR
Usual careModerateSmallTai chiSome evidence of safety§NR

*Compared to pulsed electromagnetic fields, muscle-strengthening or aerobic exercise, weight loss.

†Up to 45% frequency of minor adverse events.

‡Only in the short term.

§Systematic reviews (SRs) concluded tai chi is safe.

NR, not reported (by SRs).

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