Table 3.

Correlations (Pearson) between fatigue and psychosocial and anthropometric characteristics, quality of life, and sleep quality.

	SLE (1)   n = 50	Depression (2)   n = 45	Controls (3)   n = 53
Age (years)	0.489**	−0.061	0.243
Education (years)	−0.476**	−0.043	−0.294
HADS
Anxiety	0.542**	0.202	0.397**
Depression	0.576**	0.402*	0.410**
SF-36
PSC	−0.717**	−0.351*	−0.466**
Physical functioning	−0.648**	−0.103	−0.318*
Role limitations due to physical health problems	−0.699**	−0.393*	−0.302*
Social functioning	−0.354*	−0.389*	−0.226
Mental health	−0.464**	−0.416**	−0.435**
Role limitations due to emotional problems	−0.315*	−0.249	−0.274
Vitality	−0.677**	−0.323*	−0.660**
Bodily pain	−0.563**	−0.450**	−0.287
General health	−0.617**	−0.418**	−0.580**
PSQI global score	0.401**	0.334*	0.425**
BMI (kg/m2)	0.135	−0.82	−0.301*

*P < 0.05, **P < 0.01; PSC: Physical summary component; BMI: body mass index.