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Table 1 The effect of time (in months) on placebo response across all trials

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

Outcome type Intercept Coefficient
β0 (95% CI) P value β (95% CI) P value
All 0.55 (0.42, 0.68) <0.0001 -0.0070 (-0.024, 0.010) 0.40