Research Article

A Preliminary Evaluation of the Physiological Mechanisms of Action for Sleep Restriction Therapy

Table 2

Nature and direction of change between baseline, treatment, and post-treatment for each sleep variable and participant.

Sleep variables/participantsDFE TreatmentPosttreatmentARAO
TimeLevelSlopeLevelSlope

Sleep-onset latency
 16491.04 −0.56ns−34.28*** 0.30ns7.27ns1.52ns1, 112
 27093.89−0.65** 3.07ns0.46ns 4.99ns0.10ns74
 37456.90 2.09ns −69.77* −2.72ns 37.23ns−2.22ns13
 46783.01−0.18ns−31.35***0.38ns −71.90**33.30***95
 57472.97−0.28ns−18.93*0.34ns −15.86ns0.43ns6, 10, 115

Mean n/a79.56 0.08 −30.25 −0.25 −7.65 6.63n/an/a

Total wake time
 16389.99−0.71ns −46.30*** 0.52ns21.22ns−0.43ns45
 27373.08 0.75ns−155.94***−0.38ns 8.22ns−3.15ns145
 37259.70 1.89ns−87.79**−1.94ns43.12ns−3.46ns3, 94
 47259.34−1.04ns−140.16*** 1.35ns60.47ns−6.89ns80
 57947.73−0.58ns −50.56* 0.30ns −37.65ns 5.17ns9, 131

Mean n/a69.97 0.06 −96.15 −0.03 19.08 −1.75n/an/a

Total sleep time
 16277.54 0.77ns −65.55** 0.48ns−41.98ns 14.89*145
 27161.44−4.57ns −0.31ns6.19*−109.06* 9.09ns1, 10, 113
 37257.33−0.44ns−134.33*** 2.41ns−63.32ns 5.14ns15
 47124.79 1.15ns −60.08*−1.43ns −41.27ns10.94ns6, 120
 57930.95 0.43ns −17.26ns−0.39ns 35.12ns 5.41ns52

Mean n/a50.41 −0.53 −55.51 1.45 −44.10 9.09n/an/a

Sleep efficiency
 16189.89 0.20ns 7.10**−0.13ns−3.83ns0.18ns05
 27171.57−0.28ns 36.08*** 0.13ns −6.46ns1.03ns1, 104
 37250.96 −0.30ns 10.49ns 0.37ns−9.83ns0.80ns1, 94
 46851.79 0.06ns18.60**−0.10ns −20.02ns2.55ns12, 143
 57935.47 0.12ns 7.19ns−0.05ns 8.02ns −0.61ns1, 9, 130

Mean n/a59.94 −0.04 15.89 0.04 −6.42 0.79n/an/a

DFE: degree of freedom; AR: autocorrelation; AO: number of outliers; ns: not significant.
; ; *** .