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. Author manuscript; available in PMC: 2010 Sep 15.
Published in final edited form as: Arthritis Rheum. 2009 Sep 15;61(9):1179–1186. doi: 10.1002/art.24649

Table 1.

Socioeconomic-demographic Variables Associated with Persistent Fatigue in LUMINA Patients by Univariable Analyses

Variable* Estimate Z value p value
Age* 0.0073 0.72 0.4721
Gender −0.1570 −0.77 0.4400
Ethnicity
     Texan Hispanic −0.0027 −0.02 0.9880
     Puerto Rican Hispanic Reference Group
     African American 0.1443 0.91 0.3618
     Caucasian 0.4560 2.94 0.0033
Marital status (married) 0.2329 2.16 0.0309
Education* −0.1246 −0.10 0.2976
Occupation (employed) −0.1587 −1.40 0.1617
Poverty (below) 0.0022 0.02 0.9942
Having health insurance 0.0736 0.58 0.5617
Drinking −0.0430 −0.24 0.8117
Smoking 0.3519 3.00 0.0027
Recreational drug use 0.7143 1.43 0.1521
Exercising −0.2710 −2.46 0.0140
*

These variables have been dichotomized using their median values as the reference point (age=37 years; education=12 years).

As per the US Federal government guidelines adjusted for the number of persons in the household.