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Table 4 Simple Mediation Analyses

From: Potential mechanisms underlying sleep disturbance in young people with borderline personality disorder features: an exploratory study

DV Simple Mediating Variable (M) Effect of IV on M (a) Effect of M on DV Direct effect (c′) Total effect (c) Indirect effect Indirect effect 95% BCa CI
(b) (a x b)
PSQI DERS-Total 63.95* 0.06* 1.41 5.13* 3.62* [0.15, 6.53]*
Non-Accept 9.23* 0.04 4.67* 0.36 [−1.53, 1.87]
Goals 7.61* 0.13 4.00* 1.03 [−0.37, 2.40]
Impulse 14.40* 0.30* 0.68 4.35* [1.38, 6.58]*
Awareness 5.93* 0.12 4.29* 0.74 [−0.36, 2.00]
Strategies 18.39* 0.22* 0.97 4.06* [1.14, 6.72]*
Clarity 7.86* 0.2 3.44* 1.59 [−1.15, 3.90]
Depression 24.97* 0.12* 2.02 3.11* [0.71, 5.32]*
Anxiety 15.40* 0.25* 1.22 3.92* [1.85, 5.69]*
Stress 18.40* 0.16* 2.17 2.97* [0.65, 4.86]*
ISI DERS-Total 63.95* 0.10* 3.92 10.71* 6.31 [−0.32, 11.45]
Non-Accept 9.23* 0.1 9.27* 0.96 [−1.97, 3.49]
Goals 7.61* 0.22 8.53* 1.7 [−0.44, 4.36]
Impulse 14.40* 0.46* 3.54 6.69* [2.02, 10.57]*
Awareness 5.93* 0.22 8.96* 1.27 [−0.68, 3.42]
Strategies 18.39* 0.43* 2.24 7.99* [2.25, 12.83]*
Clarity 7.86* 0.35 7.51* 2.72 [−1.95, 6.62]
Depression 24.97* 0.20* 5.72* 4.99* [0.28, 9.32]*
Anxiety 15.40* 0.43* 4.17* 6.55* [3.27, 9.45]*
Stress 18.40* 0.30* 5.28* 5.43* [1.80, 8.48]*
Time in Bed DERS-Total 62.46* 0.56 38.47 73.48* 35 [−26.40, 92.22]
Non-Accept 8.66* 2.3 53.81* 19.67 [−6.87, 48.20]
Goals 7.40* −0.07 73.99* −0.51 [−24.43, 26.11]
Impulse 14.10* −0.99 87.43* −13.96 [−91.20, 45.35]
Awareness 6.08* 4.49* 46.18* 27.30* [5.78, 55.36]*
Strategies 18.08* 0.22 69.42* 4.06 [−67.85, 72.05]
Clarity 7.69* 2.74 52.36* 21.12 [−25.86, 54.77]
Bedtime Variability (SD) Depression 24.76* 0.71 17.43 34.91* 17.48 [−13.84, 59.95]
Anxiety 15.05* 2.49* −2.57 37.48* [2.26, 74.47]*
Stress 17.88* 1.75* 3.63 21.28 [−5.29, 72.64]
  1. Note. The independent variable for all analyses was group status (0 = healthy, 1 = BPD). PSQI Pittsburgh Sleep Quality Index. ISI Insomnia Severity Index. DV Dependent variable. IV Independent variable. M Simple mediating variable. SD Standard deviation. *Significant, as indicated by confidence intervals not encompassing zero [36]