Table 3 Pearson and Point-Biserial Correlations Between Group, Mediating and Outcome Variables

Insomnia Severity Index

.723**

.776**

.745**

.512**

.562**

.735**

.486**

.758**

.633**

.725**

.720**

Pittsburgh Sleep Quality Index

.648**

.705**

.656**

.433**

.508**

.675**

.441**

.663**

.568**

.646**

.617**

Epworth Sleepiness Scale

.085

.172

.184

.093

.099

.066

.224

.061

.081

.111

.056

Bedtime

−.206

−.126

.021

−.030

− .030

− .072

− .166

− .114

−.167

− .103

− .072

Rise Time

.214

.282*

.369**

.365**

.259*

.294*

.309**

.290*

.258*

.351**

.372**

Time in Bed

.455**

.450**

.398**

.445**

.325**

.407**

.520**

.445**

.462**

.503**

.497**

Total Sleep Time

.383**

.354**

.308**

.297*

.267*

.307*

.364**

.380**

.362**

.386**

.261**

Sleep Onset Latency

−.025

−.009

−.014

.119

−0.003

.050

.022

−.009

.008

.051

.107

Sleep Efficiency

.048

.007

.006

−.063

.025

.010

−.054

.062

.016

.008

−.020

Wake After Sleep Onset

.015

.055

.057

.126

.014

.060

.156

−.001

.055

.069

.104

Bedtime (SD)

.351**

.442**

.426**

.211

.199

.303*

.035

.371**

.230

.297*

.345**

Rise Time (SD)

.331**

.351**

.343**

.266*

.315**

.279*

.044

.318**

.166

.308*

.394**

Time in Bed (CV)

.118

.158

.190

.123

.171

.049

−.038

.120

−.030

.086

.125

Total Sleep Time (CV)

.062

.112

.132

.136

.096

.007

−.020

.046

−.025

.045

.047

Group (0 = HC, 1 = BPD)

.833**

.795**

.782**

.648**

.666**

.869**

.524**

.874**

.755**

.880**

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