Table 2.
PRC Bisection Test Inflection Phases and Clock Times of Inflection
| GROUP | INFLECTION referenced to acrophase | TIME (mean) | D | N | P |
| aMT6s phase shifts referenced to aMT6s acrophase | |||||
| All ages | 21.3° | 4:56 | 36.9 | 106 | <0.0001 |
| Young males | 21.3° | 5:29 | 37.4 | 19 | 0.004 |
| Young females | 45.3° | 6:37 | 38.7 | 31 | 0.007 |
| Older males | 29.1° | 5:23 | 28.8 | 28 | 0.087 |
| Older females | 1.6° | 3:49 | 45.35 | 28 | <0.0001 |
| cortisol phase shifts referenced to baseline aMT6s acrophase | |||||
| All ages | 4.5° | 3:49 | 35.6 | 73 | 0.0005 |
| oral temperature phase shifts referenced to baseline oral temperature acrophase | |||||
| All ages | 159.6° | 3:31 | 55.0 | 96 | <0.0001 |
| lab actigraphic sleep phase shifts referenced to baseline aMT6s acrophase | |||||
| All ages | 10.7° | 4:14 | 38.0 | 102 | 0.03 |
| Shifts in aMT6s onset, offset, and duration, with treatment time referenced to aMT6s acrophase | |||||
| aMT6s onset | 27.5° | 05:21 | 33.9 | 104 | <0.0001 |
| aMT6s offset | 14.1° | 04:28 | 22.5 | 104 | <0.02 |
| aMT6s duration* | 29.1° | 05:28 | 1.06 h | 104 | P < 0.01 |
* The bisection test was modified to determine if changes in aMT6s duration were random in phase