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Mean instrumentation time taken by the three groups
| Instrument time | Mean (minutes) | SD | Mean difference | p value | |
|---|---|---|---|---|---|
| Group I | 4.22 | 1.14 | Group I vs Group II | −1.637 | 0.001 |
| Group II | 2.58 | 0.707 | Group I vs Group III | −1.695 | 0.001 |
| Group III | 2.53 | 0.636 | Group II vs Group III | 0.058 | 1.00 |
| p | 0.0001 |
