International Journal of Rheumatology / 2018 / Article / Tab 2

Research Article

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

Table 2

Associations between grip strength, knee extensor strength, lower extremity function, and employment status (dependent variable: gainfully employed).

Employment status (gainfully employed)
Handgrip strength (HGS)Knee extensor strength (KES)Short physical performance battery score (SPPB)
ModelVariableR2OR95% CIR2OR95% CIR2OR95% CI

IHGS/KES/SPP0.091.041.01-1.070.221.061.03-1.100.141.491.14-1.94
IHGS/KES/SPP0.381.051.00-1.090.441.061.02-1.110.411.461.07-2.00
Age - years0.880.83-0.950.890.83-0.960.890.83-0.95
Gender: male-Reference- -Reference- -Reference
 female1.150.32-4.161.530.34-3.960.410.14-1.23
Education: compulsory- -Reference- -Reference- -Reference
 secondary4.121.08-15.713.881.01-14.884.811.25-18.55
 higher3.520.49-25.933.910.48-31.662.870.37-21.87
IIHGS/KES/SPP0.381.050.99-1.120.481.071.02-1.130.481.711.18-2.49
Age - years0.890.83-0.960.900.83-0.980.890.82-0.96
Gender: male- -Reference-Reference- -Reference
 female1.260.30-5.321.090.29-4.040.290.08-1.00
Education: compulsory- -Reference- -Reference- -Reference
 secondary4.321.00-18.574.090.97-17.266.591.42-30.64
 higher4.810.48-47.706.050.54-68.544.970.46-53.36
bDMARD therapy - yes vs. no2.460.85-7.132.320.78-6.942.650.88-7.98
Comedication - yes vs. no0.670.11-3.940.480.08-2.850.660.11-3.93
Comorbidity - yes vs. no0.930.15-5.921.460.21-10.000.930.14-6.11
Pain intensity - yes vs. no0.920.69-1.211.000.75-1.360.960.71-1.30
CRP - mg /dl1.020.98-1.061.020.99-1.061.041.00-1.08

Binary logistic regression analysis. OR=odds ratios, HGS=handgrip strength, KES=knee extensor strength, SPPB=short physical performance battery, bDMARDs=biological disease modifying antirheumatic drug, and CRP=C-reactive protein.
p≤ 0.05; p≤ 0.01; kg HGS/KES; per point of the SPPB score; II adjusted for sociodemographic variables p≤0.02 in univariate analysis; adjusted for sociodemographic and clinical variables p≤ 0.2 in univariate analysis.

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