Table 1 Study selection criteria
From: Diagnosis and therapy of functional tremor a systematic review illustrated by a case report
| Study category | Quality criteria |
|---|---|
| Low rated (LR) |
Case reports, reviews and clinical studies without standardized diagnostic criteria, evaluations scales and protocols |
| Moderate rated (MR) | Clinical trials with low patient numbers, lack of control groups, Reviews with incomplete study entry on validated basis |
| High rated (HR) | Controlled trials, reviews with standardized procedures, validated protocols and sufficient methodology |