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Table 5 The effect of time (in months) on placebo response in trials with pain as the outcome

From: A meta-analysis of temporal changes of response in the placebo arm of surgical randomized controlled trials: an update

Outcome Intercept Coefficient
β0 (95% CI) P value β (95% CI) P value
Pain 0.91 (0.75, 1.07) <0.0001 -0.013 (-0.06, 0.03) 0.48