Skip to main content
. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: J Affect Disord Rep. 2020 Oct 13;1:100010. doi: 10.1016/j.jadr.2020.100010

Table 3.

Results from unadjusted and adjusted regression analyses: proportion of variance (R2) explained by each bivariate association. ΔR2 is the proportion of variance specific to each bivariate association while controlling for age, gender, and the other three study variables. In the adjusted model, variables were entered hierarchically, with all covariates entered in Step 1 and the variable of interest entered in Step 2.

Unadjusted Models Adjusted Models
R2 p-value ΔR2 p-value
CSQ – CES-D 0.057 < 0.001 0.007 0.12
CSQ – ISI 0.045 < 0.01 0.003 0.27
CSQ – FIRST 0.039 < 0.01 0.007 0.13
FIRST – CES-D 0.152 < 0.001 0.014 0.02
FIRST – ISI 0.195 < 0.001 0.044 < 0.001
ISI – CES-D 0.366 < 0.001 0.218 < 0.001

CSQ = Cognitive Style Questionnaire, FIRST = Ford Insomnia Response to Stress Test, ISI = Insomnia Severity Index, CES-D = Center for Epidemiologic Studies Depression Scale.