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Table 1 Characteristics of the study population

From: Incidence of giant cell arteritis in Western Norway 1972–2012: a retrospective cohort study

Clinical characteristic Overall
N = 792
Female
N = 566
Male
N = 226
P value for difference between sexes
Mean age at onset of GCA, years (SD) 73.1 (8) 73.5 (8) 72.1 (9) 0.041
ACR criteria fulfilled, persons, n (%) 792 (100) 566 (100) 226 (100)  
 Age ≥50 years at disease onset, n (%) 788 (99.5) 564 (99.6) 224 (99.1) 0.322 (Fisher)
 New onset headache, n (%) 573 (72.3) 405 (71.6) 168 (74.3) 0.897
 Temporal artery tenderness, n (%) 365 (46.1) 256 (45.2) 109 (48.2) 0.390
 Decreased temporal pulse, n (%) 227 (28.7) 168 (29.7) 59 (26.1) 0.416
 ESR ≥50 mm/h, n (%) 717 (90.5) 510 (90.1) 207 (91.6) 0.351
 Biopsy showing vasculitis, n (%) 528 (66.7) 378 (66.8) 150 (66.4) 0.984
Giant cells in biopsy, n (%) 243 (30.7) 185 (32.7) 58 (25.7) 0.137
Jaw claudication, n (%) 181 (22.9) 134 (23.7) 47 (20.8) 0.763
Polymyalgia rheumatica, n (%) 242 (30.6) 192 (33.9) 50 (22.1) 0.008
Peripheral arthritis, n (%) 32 (4.0) 23 (4.1) 9 (4.0) 0.760
Visual disturbance, n (%) 146 (18.4) 103 (18.2) 43 (19.0) 0.786
 Blindness in one or both eyes, n (%) 32 (4.0) 23 (4.1) 9 (4.0) 0.958
Scalp necrosis, n (%) 6 (0.8) 4 (0.7) 2 (0.9) 0.679 (Fisher)
Mean ESR, mm/h (SD) N = 782a 84.6 (27) 84.2 (28) 85.7 (27) 0.483
Mean CRP, mg/L (SD) N = 601a 91.2 (63) 88.3 (62) 99.2 (65.3) 0.059
  1. If a given variable was not documented in the patient’s record it was registered as missing. In subsequent statistical analyses missing data were treated as negative findings. The t test was used for comparing continuous variables and the chi-square or Fisher’s exact test for comparing categorical variables.
  2. GCA giant cell arteritis, ACR American College of Rheumatology, ESR erythrocyte sedimentation rate, CRP C-reactive protein
  3. aMean laboratory values were calculated within the subset with available data