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Table 1 Association of internal factors with at-work productivity loss for workers with RA

From: Productivity at work and quality of life in patients with rheumatoid arthritis

Baseline characteristics N = 150 At-work productivity loss
Univariate N = 150
  Mean (sd) B 95% CI p-value
Internal factors
Age 49.7 (8.6) -0.03 -0.08; 0.03 0.36
Female 84.0a -0.83 -2.12; 0.45 0.20
Education:    Overall p-value: 0.29
Low 21.3a Ref. Ref. Ref.
Middle 32.0a -0.02 -1.28; 1.23 0.87
High 46.7a 0.71 -0.47; 1.89 0.24
Time since diagnosis 10.4 (8.9) -0.03 -0.08; 0.02 0.25
Duration of complaints >10 years 47.3a 0.04 -0.87; 0.95 0.93
Comorbidity present 64.7a -0.17 -1.12; 0.78 0.73
Pain (0-10b) 3.72 (2.50) 0.18 -0.002; 0.36 0.05
Fatigue (0-10b) 4.59 (2.53) 0.27 0.10; 0.44 <0.01
Health Assessment Questionnaire (0-3b) 0.79 (0.55) 0.69 -0.14; 1.53 0.10
Quality of life dimensions (RAND 36) (0-100b):
- Mental health 77.2 (14.5) -0.10 -0.13; -0.08 <0.01
- Pain 64.6 (17.8) -0.05 -0.07; -0.02 <0.01
- Physical role limitations 48.0 (40.3) -0.03 -0.04; -0.02 <0.01
- Physical functioning 67.1 (21.5) -0.02c -0.04; 0.002 0.08
- Social functioning 71.4 (21.4) -0.06c -0.08; -0.04 <0.01
- Vitality 54.3 (18.5) -0.06c -0.08; -0.04 <0.01
- Emotional role limitations 78.6 (37.1) -0.03c -0.04; -0.02 <0.01
- General health perception 50.8 (17.3) -0.04c -0.06; -0.01 <0.01
- Perceived health change 51.7 (26.7) -0.02c -0.04; -0.01 0.01
  1. a.Expressed as n(%).
  2. b.Range of the scale on which the score was based.
  3. c.Item was not retained based on the second analyses step (multivariate models for the RAND36 subscales).