International Journal of Rheumatology / 2018 / Article / Tab 3

Research Article

Work Ability and Employment in Rheumatoid Arthritis: A Cross-Sectional Study on the Role of Muscle Strength and Lower Extremity Function

Table 3

Univariate analysis of associations between sociodemographic, clinical characteristics, and workability (workability index single item, WAS).

Workability (WAS)
Variablep-value

Age - years- 0.10<0.001
Sex: maleReference
 female0.940.108
Marital status: in a relationshipReference
 living alone-0.190.757
Education: compulsoryReference
 secondary1.260.083
 higher2.940.005
Disease duration - months-0.010.003
Disease activity (CDAI) - points-0.100.003
Pain (VAS) - points-0.67<0.001
Functional disability (HAQ) - points-2.63<0.001
CRP - mg/dl-0.020.275
IL-6 - pg/dl-0.030.291
TNF-alpha - µg/dl-0.140.217
RA therapy: sDMARDs1.090.111
 bDMARDs- 1.520.787
 Corticosteroids0.320.660
 NSAIDs/Pain killers- 1.020.185
Comedication-1.810.001
Comorbidity-1.500.009
Muscle strength: hand grip - kg0.050.012
 Knee extensor - kg0.06<0.001
Lower Extremity function (SPPB) - points0.81<0.001

=Beta coefficient, CDAI=clinical disease activity index, VAS=visual analogue scale, CRP=C-reactive protein, IL-6=interleukin-6, TNF-alpha=tumor necrosis factor-alpha, s/b DMARD=synthetic/biological disease-modifying antirheumatic drug, RA=rheumatoid arthritis, and SPPB=short physical performance battery.

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