Table 6. Longitudinal linear regression analyses with follow-up perfectionism as the dependent variables, and age, sex, baseline and follow-up insomnia severity, baseline anxiety and baseline depression as predictors.
| Dependant Variable | ||||||||
|---|---|---|---|---|---|---|---|---|
| Doubts About Action | Parental Criticism | |||||||
| Predictors in the model | R2 | β | t | Sig. | R2 | β | t | Sig. |
| Step 1 | ||||||||
| Age | .00 | -.06 | -0.45 | .66 | .01 | .04 | 0.28 | .78 |
| Step 2 | ||||||||
| Age | .01 | -.07 | -0.46 | .65 | .02 | .03 | 0.21 | .84 |
| Sex | .03 | 0.23 | .82 | .13 | 0.93 | .36 | ||
| Step 3 | ||||||||
| Age | .10 | -.07 | -0.50 | .61 | .11 | .03 | 0.19 | .85 |
| Sex | -.01 | -0.12 | .92 | .08 | 0.62 | .54 | ||
| ISI Baseline | .31 | 2.32 | .02* | .31 | 2.36 | .02* | ||
| Step 4 | ||||||||
| Age | .10 | -.07 | -0.49 | .63 | .17 | .02 | 0.13 | .90 |
| Sex | -.02 | -0.15 | .88 | .13 | 1.03 | .31 | ||
| ISI Baseline | .28 | 1.65 | .11 | .51 | 3.20 | .01** | ||
| ISI Follow-up | .05 | 0.26 | .80 | -.34 | -2.04 | .05* | ||
| Step 5 | ||||||||
| Age | .24 | -.07 | -0.55 | .59 | .30 | .02 | 0.18 | .86 |
| Sex | -.02 | -0.18 | .86 | .13 | 1.04 | .30 | ||
| ISI Baseline | .15 | 0.90 | .37 | .42 | 2.66 | .01** | ||
| ISI Follow-up | -.14 | -0.79 | .43 | -.50 | -3.03 | .01** | ||
| Anxiety | .47 | 3.10 | .01** | .41 | 2.84 | .01** | ||
| Step 6 | ||||||||
| Age | .24 | -.07 | -0.54 | .59 | .30 | .01 | 0.12 | .91 |
| Sex | -.02 | -0.18 | .86 | .14 | 1.11 | .27 | ||
| ISI Baseline | .15 | 0.86 | .39 | .40 | 2.57 | .01** | ||
| ISI Follow-up | -.14 | -0.79 | .44 | -.52 | -3.08 | .01** | ||
| Anxiety | .47 | 2.62 | .01** | .37 | 2.23 | .03* | ||
| Depression | .00 | -0.03 | .97 | .10 | 0.67 | .53 | ||
Notes
ISI, Insomnia Severity Index
*Significant for p-level < .05.
** Significant for p-level < .01.