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