Table A
Range of abnormal concentrations of thyroid stimulating hormone, free thyroxine, and positive antiperoxidase and antithyroglobulin antibodies in cases of giant cell arteritis and controls
Variable | No (%) | Median | (5%; 95% centile) | P value* |
Thyroid stimulating hormone | ||||
Low concentration: | ||||
Controls | 5 (2.4) | 0.15 | (0.01; 0.19) | 0.921 |
Cases | 13 (4.6) | 0.15 | (0.06; 0.19) | |
High concentration: | ||||
Controls | 16 (7.7) | 6.15 | (4.3; 12) | 0.561 |
Cases | 12 (4.2) | 6.6 | (4.3; 53.8) | |
Free thyroxine | ||||
High concentration: | ||||
Controls | 1 (0.5) | 34.3 | — | 0.540 |
Cases | 2 (0.7) | 38.45 | (30.6; 46.3) | |
Low concentration: | ||||
Controls | 0 | — | — | NA |
Cases | 7 (2.5) | 8.8 | (5.9; 9.7) | |
Antibodies | ||||
Antiperoxidase positive | ||||
Controls | 29 (13.9) | 855 | (139; 3844) | 0.103 |
Cases | 42 (14.7) | 434.5 | (115; 8750) | |
Antithyroglobulin positive | ||||
Controls | 47 (22.6) | 116 | (59; 730) | 0.958 |
Cases | 71 (24.9) | 107 | (60; 1200) | |
*Wilcoxon rank sum test performed for comparison of values outside normal range.