Results of sensitivity analysis for SD and SP data
| Analysis | N | Prevalence | 95% CI | P value | 95% PI | I2 | 95% CI |
| Outliers removed (SD data)* | 18 | 6% | 4% to 8% | <0.001 | 0% to 22% | 69% | 49 to 81 |
| Outliers removed (SP data)† | 15 | 16% | 13% to18% | 0.1 | 10% to 22% | 32% | 0 to 64 |
*Removed as outliers: Cunningham Owens et al,46 Honer et al,48 Kopala et al,53 Lee et al,54 McCreadie et al,56 Rybakowski et al.62
†Removed as outliers: Caligiuri and Lohr,40 Chong et al,43 Honer et al,48 Honer et al,49 Kopala et al,53 Rybakowski et al.62
PI, prediction interval; SD, spontaneous dyskinesia; SP, spontaneous parkinsonism.