Table 4 Correlations of the Athens Insomnia scale with different variables of RA patients and OA patients

Patients’ age

0.012 ( 0.96)

0.41 (0.069)

Disease duration

− 0.051 (0.83)

0.34 (0.13)

Morning stiffness

0.407 (0.07)

0.69 (0.001**)

No. of tender joints

0.668** (< 0.001 **)

0.81 (0.001) **

No. of swollen joints

0.673^**(< 0.001 **)

–

DAS-28

0.71 (< 0.001 **)

–

Hemoglobin

− 0.031 (0.18)

− 0.32 (0.17)

ESR

0.36 (0.11)

0.41(0.07)

CRP

0.18 (0.42)

–

RF

0.19 (0.41)

–

Anti-CCP antibodies

0.53* (0.02) *

–

Short Form Quality of Life SF-36

− 0.02 (0.92)

− 0.43 (0.060

Beck Depression Inventory

0.65 (0.002) **

0.51* (0.02) *

HAQ-DI

0.03 (0.89)

0.37 (0.10)

Simple Erosion Narrowing score

− 0.008 (0.97)

WOMAC

–

0.57* (0.009)

KOFUS

–

0.761* (< 0.001**)

Kellgren–Lawrence grades

–

0.675* (0.001) **