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Table 2 Correlations among variables and results from the linear regression models of ISI total score (continue variable) stratified by the three pain groups

From: Insomnia severity and its relationship with demographics, pain features, anxiety, and depression in older adults with and without pain: cross-sectional population-based results from the PainS65+ cohort

Variable

Correlations with ISI (r)

Multiple regression weights

R 2

Β

β

a. Model 1

Chronic pain (n = 2790)

   

0.24

 Age (years)

0.43

−0.017

−0.023

 

 Female sex

0.19

0.235

0. 021

 

 Pain intensity

0.27***

0.356***

0.138***

 

 Pain spreading

0.20***

0.069*

0.075*

 

 GWBS-anxiety

0.43***

0.259***

0.237***

 

 GWBS-depression

0.40***

0.261***

0.132***

 

b. Model 2

Subacute pain (n = 510)

   

0.26

 Age (years)

0.01

−0.039

−0.053

 

 Female sex

0.07

0.188

0.018

 

 Pain intensity

0.16*

0.246

0.086

 

 Pain spreading

0.06

0.010

0.004

 

 GWBS-anxiety

0.48***

0.294*

0.274*

 

 GWBS-depression

0.46***

0.344*

0.246*

 

c. Model 3

No pain (n = 2905)

   

0.44

 Age (years)

0.21

0.045

0.056

 

 Female sex

−0.05

−0.061

−0.057

 

 Pain intensity

NA

NA

NA

 

 Pain spreading

NA

NA

NA

 

 GWBS-anxiety

0.66***

0.747***

0.581***

 

 GWBS-depression

0.53***

0.136

0.099

 
  1. ISI Insomnia Severity Index, GWBS general well-being schedule, r correlation coefficient, B unstandardized regression coefficients, β standardized regression coefficients, R 2 multiple correlation coefficient squared, NA not applicable
  2. * p < 0.05, ** p < 0.01, *** p < 0.001