Examples of the intervention
| Study | Modality | Main outcomes | Main findings | Randomised? |
|---|---|---|---|---|
| Kaptchuk et al14 | Placebo pills | IBS Global Improvement Scales | Open-label placebos outperform untreated groups | Yes |
| Kelley et al40 | Placebo pills | Depression (HAM-D-17) | Open-label placebos outperform untreated groups | Yes |
| Sandler and Bodfish10 | Placebo pills | ADHD | Open-label placebos outperform untreated groups | Yes |
| Aulas and Rosner4 | Placebo pills | Depression | Open-label placebos outperform untreated groups | No (before/after study) |
| Park and Covi8 | Placebo pills | Anxiety | Open-label placebos outperform untreated groups | No (before/after study) |
ADHD, attention deficit hyperactivity disorder; HAM-D-17, Hamilton Rating Scale for Depression; IBS, irritable Bowel Syndrome.