Concurrent hierarchical linear regression analyses with insomnia symptoms as the dependent variable, and age, sex, parental criticism, anxiety and depression as predictors at baseline.

<p>Notes</p><p>*Significant for p-level < .05.</p><p>** Significant for p-level < .01.</p><p>Concurrent hierarchical linear regression analyses with insomnia symptoms as the dependent variable, and age, sex, parental criticism, anxiety and depression as predictors at baseline.</p

Concurrent correlations between insomnia symptoms, anxiety, depression and perfectionism at baseline and follow-up.

<p>Notes</p><p>Baseline (n = 76) correlations are displayed below the diagonal; follow-up (n = 57) correlations are displayed above the diagonal.</p><p>ISI, Insomnia Severity Index; CM, Concern Over Mistakes; D, Doubts About Action; PE, Parental Expectations; PC, Parental Criticism; ORG, Organization; PS, Personal Standards, SOP, Self Oriented Perfectionism; OOP, Other Oriented Perfectionism; SPP, Socially Prescribed Perfectionism.</p><p>*Significant for p-level < .05.</p><p>** Significant for p-level < .01.</p><p>Concurrent correlations between insomnia symptoms, anxiety, depression and perfectionism at baseline and follow-up.</p

Concurrent hierarchical linear regression analyses with insomnia symptoms as the dependent variable, and age, sex, doubts about action, anxiety and depression as predictors at baseline.

<p>Notes</p><p>*Significant for p-level < .05.</p><p>** Significant for p-level < .01.</p><p>Concurrent hierarchical linear regression analyses with insomnia symptoms as the dependent variable, and age, sex, doubts about action, anxiety and depression as predictors at baseline.</p

Participant characteristics concerning ethnicity, work status and education level.

<p>Notes</p><p>N, Number of Participants; %, Percentage of Participants; Education, Highest Qualification Attained; GCSE, General Certificate of Secondary Education; HND, Higher National Diploma.</p><p>Participant characteristics concerning ethnicity, work status and education level.</p

Mean scores and standard deviations (SD) for insomnia symptoms, anxiety, depression and perfectionism.

<p>Notes</p><p>Range: Min–Max; Insomnia Severity Index: Possible Range 0–28; Perfectionism: Concern Over Mistakes, Possible Range 9–45; Doubts About Action, 4–20; Parental Expectations, 5–25; Parental Criticism, 4–20; Organisation, 6–30; Personal Standards, 7–35; Self Oriented Perfectionism, 15–105; Other Oriented Perfectionism, 15–105; Socially Prescribed Perfectionism, 15–105; Hospital Anxiety & Depression Scale: Anxiety, Possible Range 0–21; Depression; 0–21.</p><p>Mean scores and standard deviations (SD) for insomnia symptoms, anxiety, depression and perfectionism.</p

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.

<p>Notes</p><p>ISI, Insomnia Severity Index</p><p>*Significant for p-level < .05.</p><p>** Significant for p-level < .01.</p><p>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.</p

Hierarchical regressions for the dependent variables; Chalder Fatigue Scale, Cognitive Failures Questionnaire, Trail Making Task and Epworth Sleepiness Scale.

<p>Notes:</p><p>*<i>p</i> < .05,</p><p>** <i>p</i> < .01,</p><p>*** <i>p</i> < .001;</p><p>Entries represent standardized beta coefficients.</p><p>SE, sleep efficiency; NWAK, number of awakenings; WASO, wake after sleep onset; SOL, sleep onset latency</p><p>Hierarchical regressions for the dependent variables; Chalder Fatigue Scale, Cognitive Failures Questionnaire, Trail Making Task and Epworth Sleepiness Scale.</p

Self-reported sleep, functional & symptom assessment data for CFS patients.

<p>Notes: <i>N</i> differs on different measures. Data <i>presented as means and standard deviations (SD)</i>. HADS, hospital anxiety and depression scale</p><p>Self-reported sleep, functional & symptom assessment data for CFS patients.</p

Hierarchical regression for the dependent variable; Trail Making Task (replacing total napping duration with AM and PM napping duration in the model).

<p>Notes: <i>N</i> = 96</p><p>* <i>p</i> < .05,</p><p>** <i>p</i> < .01,</p><p>*** <i>p</i> < .001;</p><p>Entries represent standardized beta coefficients</p><p>SE, sleep efficiency; NWAK, number of awakenings; WASO, wake after sleep onset; SOL, sleep onset latency</p><p>Hierarchical regression for the dependent variable; Trail Making Task (replacing total napping duration with AM and PM napping duration in the model).</p