TABLE 3.
Corrected mixed‐regression based estimated means and standard errors (SE) of the follow‐ups for IRT
| 3‐months follow‐up | 6‐months follow‐up | Cohen's d relative to pre‐rest | |||||
|---|---|---|---|---|---|---|---|
| Group | Mean | SE | Mean | SE | 3 months | 6 months | |
| Nightmare frequency week | IRT | 0.91 | 0.13 | 0.84 | 0.19 | 1.03 | 1.17 |
| Nights with nightmares per week | IRT | 1.66 | 0.27 | 1.72 | 0.43 | 0.91 | 0.88 |
| Nightmare distress (NDIQ) | IRT | 9.66 | 1.52 | 8.13 | 1.74 | 2.25 | 2.57 |
| Mastery | IRT | 52.16 | 5.81 | 60.76 | 6.32 | 2.14 | 2.59 |
| Depression (PHQ) | IRT | 6.30 | 1.03 | 4.64 | 0.67 | 0.47 | 0.56 |
| Anxiety (HADS‐A) | IRT | 6.13 | 0.70 | 4.18 | 0.72 | 0.42 | 0.95 |
| Insomnia severity (ISI) | IRT | 7.95 | 1.04 | 8.68 | 1.32 | 1.64 | 1.47 |
d = (M pre − M post)/SD pooled‐pre.
Abbreviations: HADS‐A, Hospital Anxiety and Depression Scale‐Anxiety; IRT, imagery rehearsal therapy; ISI, Insomnia Severity Index; NDIQ, Nightmare Distress and Impact Questionnaire; PHQ, Patient Health Questionnaire.