. Author manuscript; available in PMC: 2018 Aug 9.

Published in final edited form as: Arthritis Care Res (Hoboken). 2016 Jan;68(1):81–90. doi: 10.1002/acr.22577

Table 2.

Correlations among behavioral predictors of fatigue

	RA-specific risk factors				Other risk factors
	RADAI score	HAQ score	CRP (log)	Prednisone dose	Current smoking	Muscle weakness	Lean/fat ratio	Fitness	Sleep quality	Depressive symptoms	Obesity
RADAI score	---
HAQ score	0.59^****	---
CRP (log)	0.40^****	0.39^****	---
Prednisone dose	0.27 ^***	0.16^*	0.33^****	---
Current smoking	0.34^****	0.14	0.20^*	0.17^*	---
Muscle weakness (hip strength)	−0.27^***	−0.37^****	−0.09	−0.10	0.01	---
Lean/fat mass ratio	−0.17^*	−0.31^****	−0.10	0.03	0.03	0.35^****	---
Fitness (resting heart rate)	0.11	0.18^*	0.37^****	0.31^****	0.20^*	−0.14	−0.04	---
Sleep quality (PSQI score)	0.49^****	0.549^***	0.21^*	0.19^*	0.26^***	−0.21^**	−0.14	0.15	---
Depressive symptoms (PHQ score)	0.55^****	0.41^****	0.28^***	0.18^*	0.42^****	−0.14	−0.10	0.17^*	0.55^****	---
Obesity	0.21^**	0.33^****	0.20^*	−0.02	0.13	0.03	−0.46^****	0.04	0.12	0.21^*	---
Physical inactivity	0.23^**	0.28^***	−0.03	0.08	0.22^**	−0.22^*	−0.22^**	0.23^**	0.18^*	0.24^***	0.29^****

p<.05,

^**

p<.01,

^***

p<.001,

^****

p<.0001