Table.

Thyroid status of cases of giant cell arteritis and controls. ^*Values are numbers (percentages) unless stated otherwise

Variable	Cases (n=285)	Controls (n=208)	P value	Odds ratio (95% CI)
Thyroid stimulating hormone†
Low concentration	13 (4.6)	5 (2.4)	0.171	3.06 (0.62 to 15.20)
High concentration	12 (4.2)	16 (7.7)	0.227	0.38 (0.11 to 1.82)
Thyroxine‡
High concentration	2 (0.7)	1 (0.5)	0.546	0.34 (0.01 to 89.62)
Low concentration	7 (2.46)	0	0.324	NA
Antibodies
Antiperoxidase	42 (14.7)	29 (14.0)	0.327	1.57 (0.63 to 3.89)
Antithyroglobulin	71 (24.9)	47 (22.6)	0.574	1.26 (0.59 to 2.66)
Positive antiperoxidase and antithyroglobulin	89 (31.2)	59 (28.4)	0.3145	1.42 (0.71 to 2.84)

^*Independent variables: case or control, sex, age, geographical origin (north or south), and clinical subgroup of patient (positive or negative biopsy for temporal arteritis or polymyalgia rheumatica). 

^†Normal range 0.2-4 mIU/l. ^‡Normal range 10-26 pmoles/l.