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Table 3 The effect of time (in months) on placebo response across all trials, by outcome type

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
Subjective 0.68 (0.53, 0.82) <0.0001 -0.0042 (-0.024, 0.016) 0.67
Assessed 0.37 (-0.070, 0.81) 0.086 -0.0071 (-0.026, 0.011) 0.38
Objective 0.28(0.11, 0.46) 0.0037 -0.030 (-0.050, -0.010) 0.0084