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. Author manuscript; available in PMC: 2012 Jan 14.
Published in final edited form as: N Engl J Med. 2011 Jul 14;365(2):119–126. doi: 10.1056/NEJMoa1103319

Figure 4. Percent Change in Subjective Improvement with Each of the Four Interventions.

Figure 4

The relative improvement in subjective outcomes, assessed with the use of a visual-analogue scale (with 0 indicating no improvement and 10 indicating complete improvement), was significantly greater with the albuterol inhaler, placebo inhaler, and sham acupuncture interventions than with the no-intervention control (P<0.001). No other differences among the four experimental conditions were significant. T bars indicate standard errors.