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Objective outcome metrics used in studies.
| Measurement outcomes | No. of studies | % |
|---|---|---|
| Completion time | 21 | 75.0 |
| Instrument path length | 9 | 32.1 |
| Hand movement | 5 | 17.9 |
| Visual parameters | 2 | 7.1 |
| Collisions and injuries | 5 | 17.9 |
| aIndividual procedural metrics | 5 | 17.9 |
aNumber of errors, number of attempts, task completion rate.
