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. Author manuscript; available in PMC: 2011 Mar 8.
Published in final edited form as: JAMA. 2009 May 20;301(19):2005–2015. doi: 10.1001/jama.2009.682

Table 3.

Means and standard errors (SE) for sleep parameters as measured by polysomnography.

Acute treatment
 Extended treatment
Pre
 Post I
 Post II
Condition Mean
(SE) 		Mean
(SE) 		Change
(95% CI)		 d Condition Mean
(SE) 		Change
(95% CI)		 d
Sleep onset latency (min)
CBT 17.22
(1.11)		 10.80
(1.15)		 −6.4
(−9.1, −3.8)		 −0.64 CBT 10.91
(1.57)		 −0.40
(−4.1, 3.3)		 −0.04
No txt 15.56
(1.62)		 5.22
(1.4, 9.0)		 0.56
Combined
CBT/Med		 14.03
(1.12)		 11.21
(1.16)		 −2.8
(−5.5, −0.2)		 −0.28 CBT/
Taper		 9.31
(1.57)		 −1.8
(−5.5, 1.9)		 −0.19
CBT/
Medprn 		12.80
(1.69)		 1.4
(−2.5, 5.3)		 0.15
Wake after sleep onset (min)
CBT 64.51
(3.57)		 37.34
(3.68)		 −27.2
(−34.9, −19.5)		 −0.85 CBT 48.93
(4.80)		 10.6*
(0.0, 21.3)		 0.34
No txt 43.42
(4.91)		 7.1
(−3.9, 18.1)		 0.23
Combined
CBT/Med		 61.21
(3.59)		 34.15
(3.71)		 −27.1
(−34.8, −19.3)		 −0.85 CBT/
Taper		 47.79
(4.81)		 15.4
(4.8, 26.1)		 0.50
CBT/
Medprn 		53.11
(5.10)		 16.9
(5.6, 28.2)		 0.54
Total sleep time (min)
CBT 371.42
(4.77)		 345.58
(4.90)		 −25.9
(−34.9, −16.8)		 −0.61 CBT 348.40
(7.40)		 8.7
(−5.8, 23.1)		 0.20
No txt 361.84
(7.57)		 10.4
(−4.6, 25.3)		 0.24
Combined
CBT/Med		 377.62
(4.80)		 359.10
(4.93)		 −18.5
(−27.6, −9.4)		 −0.43 CBT/
Taper		 362.78
(7.41)		 2.3
(−12.2, 16.8)		 0.05
CBT/
Medprn 		343.64
(7.86)		 −14.2
(−29.6, 1.1)		 −0.33
Sleep efficiency (%)
CBT 82.30
(0.86)		 87.76
(0.88)		 5.5
(3.8, 7.2)		 0.71 CBT 85.12
(1.16)		 −2.1
(−4.6, 0.4)		 −0.28
No txt 86.22
(1.19)		 −2.1
(−4.6, 0.4)		 −0.28
Combined
CBT/Med		 83.72
(0.86)		 88.71
(0.89)		 5.0
(3.3, 6.7)		 0.65 CBT/
Taper		 86.41
(1.17)		 −2.7*
(−5.2, −0.2)		 −0.36
CBT/
Medprn 		84.12
(1.24)		 −4.2
(−6.8, −1.5)		 −0.56

Note. * These comparisons were no longer significant after applying a correction (P values between 0.02 and 0.05).