Sleep quality, anxiety, depression, and quality of life in rheumatoid arthritis patients and impact of disease activity

Egyptian Rheumatology and Rehabilitation

Table 5 Correlation of disease activity (DAS 28) with other variables in rheumatoid arthritis patients

Parameters	DAS 28
Parameters	R	P value*
Age	0.033	0.861
Disease duration	0117	0.538
HAM-A	0.71	< 0.001
HAM-D	0.6	< 0.001
ISI	0.540	0.002
ESS	0.257	0.170
PSQI
▪ Sleep quality	0.372	0.043
▪ Sleep latency	− 0.075	0.694
▪ Sleep duration	0.305	0.101
▪ Sleep efficiency	0.432	0.017
▪ Sleep disturbances	0.292	0.118
▪ Sleep medications	0.223	0.237
▪ Daytime dysfunction	0.452	0.012
Global PSQI	0.470	0.009
SF-36
▪ Physical functioning	− 0.691	< 0.001
▪ limitations due to physical health	− 0.774	< 0.001
▪ limitations due to emotional problems	− 0.770	< 0.001
▪ Vitality	− 0.652	< 0.001
▪ Emotional well being	− 0.713	< 0.001
▪ Social functioning	− 0.631	< 0.001
▪ Pain	− 0.811	< 0.001
▪ General health	− 0.673	< 0.001

* Spearman correlation. The P value was significant if < 0.05
DAS Disease activity score, R correlation coefficient, HAM-A Hamilton Anxiety Rating Scale, HAM-D Hamilton Depression Rating Scale, ISI Insomnia severity index, ESS Epworth sleepiness scale, PSQI Pittsburgh Sleep Quality Index, SF-36 short form 36 health survey