| Intervention | P | ||
---|---|---|---|---|
0.1Â ml | 0.5Â ml | 1.0Â ml | ||
PIPP-R at 30s, n (%) | n = 79 | n = 81 | n = 80 | 0.74 |
 -None (0) | 2 (2.5) | 0 (0.0) | 2 (2.5) |  |
 -Mild (1 to 6.9) | 40 (50.6) | 46 (56.8) | 39 (48.8) |  |
 -Moderate (7 to 11.9) | 30 (38.0) | 27 (33.3) | 33 (41.3) |  |
 -Severe (12+) | 7 (8.9) | 8 (9.9) | 6 (7.5) |  |
PIPP-R at 60s, n (%) | n = 76 | n = 80 | n = 80 | 0.97 |
 -None (0) | 1 (1.3) | 1 (1.3) | 2 (2.5) |  |
 -Mild (1 to 6.9) | 38 (50.0) | 44 (55.0) | 41 (51.3) |  |
 -Moderate (7 to 11.9) | 29 (38.2) | 26 (32.5) | 30 (37.5) |  |
 -Severe (12+) | 8 (10.5) | 9 (11.3) | 7 (8.8) |  |