Table 1. The specimen sizes and gas pressures according to application time.
| Application time (s) | Applied gas pressure (bar) | χ2 | P value | |||
|---|---|---|---|---|---|---|
| 40 | 50 | 55 | 60 | |||
| 3 | 0 | 3.04 (0, 4.14) | 5.65 (3.19, 7.89) | 6.89 (5.30, 10.70) | 22.779 | 0.000 |
| 4 | 0 | 4.46 (2.10, 6.86) | 8.63 (6.64, 10.51) | 9.46 (8.81, 10.61) | 21.969 | 0.000 |
| 5 | 0 | 5.73 (5.12, 9.13) | 7.30 (5.88, 7.94) | 12.01 (9.99, 17.20) | 24.339 | 0.000 |
| 6 | 1.06 (0.93, 1.38) | 6.86 (5.38, 8.96) | 11.39 (9.36, 13.66) | 14.86 (11.10, 17.98) | 25.256 | 0.000 |
The specimen sizes are presented as square millimeters (mm2).