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

Kripke et al. Journal of Circadian Rhythms 2007 5:4   doi:10.1186/1740-3391-5-4