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Duration of the two manoeuvres
| Groups | |||||
| A1 | A2 | B1 | B2 | C | |
| Head-down time (min) | 8.2 ± 3 | 7.7 ± 2 | 9.6 ± 7 | 8.3 ± 3 | 8.1± 2 |
| Drape time (min) | 16.1 ± 3 | 17.3 ± 4 | 17.1 ± 10 | 15.8 ± 4 | 15.5 ± 2 |
No significant difference was observed among the five groups. For definition of groups, please see text.
