Skip to main content

Table 4 Pre post data of 38 patients with PI who had been treated with CBT-I

From: Regensburg Insomnia Scale (RIS): a new short rating scale for the assessment of psychological symptoms and sleep in insomnia; Study design: development and validation of a new short self-rating scale in a sample of 218 patients suffering from insomnia and 94 healthy controls

Item Baseline Post (6 months) Participants’t-test Effect size d
  Mean (SD) Mean (SD)   
RIS score 23.45 (4.8) 16.05 (5.36) 9.52 (p < .0005) 0.37
1. Sleep latency 1.87 (1.39) 1.13 (0.87) 3.37 (p = .002) 0.44
2. Sleep duration 1.87 (1.12) 1.68 (1.22) n.s.  
3. Sleep continuity 3.37 (1.12) 2.97 (1.22) 2.57 (p = .014) 0.29
4. Early awakening 3.16 (1.03) 2.79 (1.02) 2.67 (p = .011) 0.36
5. Easy awakening 2.55 (1.15) 2.11 (1.20) 2.67 (p = .011) 0.37
6. Sleepless nights 1.82 (1.04) 1.39 (0.95) 2.20 (p = .034) 0.43
7. Thinking about sleep 2.24 (0.92) 1.68 (0.93) 3.70 (p = .001) 0.78
8. Fear of insomnia 1.61 (1.17) 1.18 (1.11) 2.46 (p = .019) 0.32
9. Impaired daytime 2.37 (1.02) 2.00 (1.15) 2.06 (p = .046) 0.32
10. Hypnotic intake 2.61 (2.60) 0.79 (0.79) 6.12 (p < .0005) 0.95
PSQI score 14.37 (2.52) 11.29 (3.52) 5.56 (p < .0005) 0.34
1. Sleep quality 2.05 (0.65) 1.66 (0.81) 3.58 (p = .001) 0.60
2. Sleep latency 2.16 (1.05) 1.66 (1.05) 3.24 (p = .003) 0.45
3. Sleep duration 2.68 (0.57) 2.47 (0.73) n.s.  
4. Sleep efficiency 2.63 (0.63) 2.18 (0.98) 2.82 (p = .008) 0.61
5. Sleep disorders 1.21 (0.53) 1.34 (0.53) n.s.  
6. Hypnotics intake 2.08 (1.30) 0.66 (1.10) 6.50 (p < .0005) 0.97
7. Daytime sleepiness 1.55 (0.92) 1.31 (0.84) n.s. n.s.
  1. Means and standard deviation of scores and items of RIS and subscales of PSQI. Cohen’s d values for effect sizes of CBT-I.