Table 2.

Behavioral, Psychological and Functional Variables Associated with Persistent Fatigue in LUMINA Patients by Univariable Analyses

Variable*	Estimate	95% CI	Z value	p value
Helplessness	0.7477	0.61 – 0.99	9.93	<0.0001
Abnormal illness–related behaviors†	0.8147	0.65 – 0.98	9.75	<0.0001
Social Support	−0.1447	−0.58 – −0.25	−4.97	<0.0001
SF-36‡
PCS‡	−0.9139	−1.06 – −0.77	−12.23	<0.0001
MCS‡	−0.7515	−0.90 – −0.60	−9.73	<0.0001

^*All variables have been dichotomized for the purpose of these analyses using their median values as the reference point (helplessness=39; IBQ score=18; social support=8.5; PCS=34.6, MCS=41.1).

^†As per the illness Behavior Questionnaire (IBQ) and the Interpersonal Support Evaluation List (ISEL), respectively

^‡Physical Component Summary and Mental Component Summary measurements of the Short Form-36.