Placebo v no treatment for various conditions*

Outcomes at end of treatmentBinary outcomes (pooled relative risk [95% CI])Continuous outcomes (pooled standardised mean difference [CI])
*Negative values favour placebo.
†Not significant.
Laboratory data0.92 (0.73 to 1.17)† 0.18 (0.02 to 0.33)
Objective, without patient cooperation0.89 (0.66 to 1.20)†−0.25 (−0.5 to −0.01)
Objective, with patient cooperation0.84 (0.52 to 1.36)†−0.21 (−0.44 to 0.02)†
Subjective and observable0.93 (0.77 to 1.11)†−0.41 (−0.61 to −0.20)
Subjective and non-observable0.97 (0.89 to 1.07)†−0.35 (−0.48 to −0.22)