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Table 1 Comparison of clinical and laboratory variables of amyloid positive and negative patients with rhumatoid arthritis.

From: Prevalence of amyloid deposition in long standing rheumatoid arthritis in Iranian patients by abdominal subcutaneous fat biopsy and assessment of clinical and laboratory characteristics

   Amyloid positive Amyloid Negative P* value
- Total patient, no (%)   15(6.8) 205(93.2) -
- Age, yrs, mean ± SD   55.2 ± 12(32–75) 51.6 ± 13.2 (22–80) NS
- Male: Female, no   3:12 50: 155 NS
- Age at disease onset yrs. Mean ± SD   46.07 ± 7.33 (27–65) 40.18 ± 6.39 (17–70) NS
- Disease duration, yrs, Mean ± SD   9.13 ± 4.67 (5–20) 11.41 ± 6.85 (5–39) NS
- Constipation no (%)   7(46.6) 39(19) <0.019
- Proteinuria, no. (%)   9(60) 17(8.3) <0.001
- RF. Positive, no. (%)   10(66) 130(63.7) NS
- CRP, *No, (%)   13(86) 156(67) NS
- Receiving DMARD, no, (%)   12(80) 155(75.6) NS
- Past use of gold, no (%)   0 17(8.3) NS
Functional class Class 3 No (%) 7 49 < 0.5
  Class 4 No (%) 2 4  
  1. RF: Rheumatoid Factor; CRP: C-reactive protein; DMARD: Disease Modifying Antirheumatic Drug.
  2. *Normal value <2.3 mg/l.