First attempt success in <30 s
| Success by blade size | N (%) | p Value |
| Manufacturers combined | ||
| Size-0 (combined) | 74 (67.3) | 0.68 |
| Size-00 (combined) | 76 (69.1) | |
| Individual blades | ||
| Size-0 (WA) | 30 (54.5) | 0.04 |
| Size-0 (RT) | 44 (80.0) | |
| Size-00 (WA) | 38 (69.1) | |
| Size-00 (RT) | 38 (69.1) | |
| OR (95% CI) | p Value | |
| Size-0 (RT) vs size-0 (WA) | 2.71 (1.09 to 7.64) | 0.03 |
| Size-00 (RT) vs size-0 (RT) | 0.36 (0.08 to 1.23) | 0.12 |
| Size-00 (WA) vs size-0 (WA) | 2.33 (0.84 to 7.41) | 0.12 |
| Size-00 (RT) vs size-00 (WA) | 1.00 (0.35 to 2.84) | 0.81 |
| Success by trial number | N (%) | p Value |
| First blade trial | 28 (50.9) | 0.02* |
| Second blade trial | 41 (74.5) | |
| Third blade trial | 40 (72.7) | |
| Fourth blade trial | 41 (74.5) |
*First blade trial vs all other blade trials.
RT, Rusch-Teleflex; WA, Welch-Allyn.