Exploration of quantitative-effectiveness association between acupuncture temporal parameters and stable chronic obstructive pulmonary disease: A systematic review and dose-response meta-analysis of randomized controlled trials.
Briefly

The relationship between the acupuncture session, duration, and FEV1%, 6MWD followed a Λ curve pattern, while the relationship between acupuncture frequency and FEV1%, 6MWD exhibited logarithmic growth.
After 12 acupuncture sessions, FEV1% and 6MWD increased by 7.06% (95% CI: 2.90 to 11.21%) and 27.89 meters (95% CI: 16.51 to 39.28 meters), respectively.
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