Change in reaction time (RT) test results from baseline to after night duty
| Tests | Baseline mean (SD) [95% CI] | After duty mean (SD) [95% CI] | z test p value | 95% CI for difference* |
|---|---|---|---|---|
| * Negative value = deterioration. | ||||
| (1) Simple RT | ||||
| RT (ms) | 315.3 (24.3) [306.7 to 324.0] | 351.5 (56.0) [331.7 to 371.4] | <0.001 | −54.9 to −17.4 |
| Accuracy (%) | 99.4 (1.52) [98.9 to 100.0] | 98.7 (4.19) [97.2 to 100.0] | 0.31 | −2.03 to 0.64 |
| (2) Choice RT | ||||
| RT (ms) | 405.9 (38.5) [392.2 to 419.5] | 430.9 (45.4) [414.8 to 447.0] | <0.001 | −37.7 to −12.3 |
| Accuracy (%) | 99.8 (0.42) [99.6 to 99.9] | 99.2 (1.88) [98.5 to 99.9] | 0.08 | −1.23 to 0.08 |
| (3) Sequence RT 1 | ||||
| RT (ms) | 439.1 (58.0) [418.6 to 459.7] | 467.3 (76.6) [440.1 to 494.5] | 0.004 | −47.1 to −9.2 |
| Accuracy (%) | 99.5 (0.71) [99.2 to 99.7] | 97.3 (5.16) [95.5 to 99.2] | 0.01 | −3.82 to −0.48 |
| (4) Sequence RT 2 | ||||
| RT (ms) | 465.5 (76.2) [437.5 to 493.4] | 487.1 (89.8) [455.3 to 519.0] | 0.08 | −48.3 to 2.9 |
| Accuracy (%) | 98.3 (1.90) [97.6 to 99.0] | 92.7 (8.32) [89.7 to 95.6] | <0.001 | −8.31 to −3.00 |