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. 2018 Jul 10;320(2):167–176. doi: 10.1001/jama.2018.8907

Figure 2. Linear Mixed-Model Results Through 24 Weeks for Selected Brief Pain Inventory-Short Form End Points.

Figure 2.

Horizontal bars at baseline indicate the observed baseline means. Vertical bars indicate the interquartile range (IQR) for each study group at each assessment time and are offset by a small margin to show the IQR for each group. Fitted regression lines for each group are also shown, with P values for the effect of intervention on Brief Pain Inventory-Short Form outcomes derived from multivariable linear mixed-model analyses with a random effect for patient, adjusting for continuous time, the baseline score, and indicator variables for study sites, and report values for comparisons between true acupuncture vs sham acupuncture and true acupuncture vs waitlist control for week 6, 12, 16, 20, and 24 assessment times.

A, P = .04 (vs sham acupuncture); P<.001 (vs waitlist control).

B, P = .18 (vs sham acupuncture); P = .003 (vs waitlist control).

C, P = .08 (vs sham acupuncture); P = .003 (vs waitlist control).

D, P = .02 (vs sham acupuncture); P<.001 (vs waitlist control).