Acupuncture vs Sham Acupuncture for Hand Osteoarthritis

Sterile single-use stainless steel needles (size 0.3 mm × 25 mm) will be utilized. After local skin disinfection with 75% alcohol wipes, acupuncturists will insert needles perpendicularly into the Ashi points to a depth of approximately 2-3 mm; horizontally into the Baxie points toward the wrist to a depth of 5-10 mm; and perpendicularly into Houxi (SI3) and Waiguan (TE5) to a depth of approximately 5-10 mm. The depth of needling will vary based on the participant's body sizes. After insertion, all needles except those in the Ashi points will be manually manipulated to achieve De qi sensations. All the needles will be retained for 30 min and then gently removed. Participants will take acupuncture treatment three times per week for a total of 12 sessions in 4 consecutive weeks.

The sham needles with blunt tips (size 0.3 mm × 25 mm) will be used in the control group. Acupuncturists will gently lift and twist the sham needles to simulate the treatment procedure, thus blinding the patients to the intervention. Acupuncturist will firstly sterilize the areas of acupoints, then apply the adhesive pads on the surface of Ashi points, Baxie points, Houxi (SI3) and Waiguan (TE5) and insert the sham needles without penetrating. The duration and frequency of treatment sessions will be the same as in the acupuncture group.