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Table 2 The incidence of giant cell arteritis (GCA) in Bergen health area 1972–2012

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

a Mean annual cumulative incidence
  All time 1972–1992 1993–2012
Cumulative incidence 95% CI Cumulative incidence 95% CI Cumulative incidence 95% CI
All patients 16.7 (15.5, 18.0) 11.2 (9.8, 12.7) 22.5 (20.5, 24.7)
Sex
 Female 22.0 (20.6, 23.5) 13.3 (11.8, 14.9) 31.2 (28.8, 33.7)
 Male 10.5 (9.5, 11.5) 8.6 (7.4, 9.9) 12.4 (10.9, 14.0)
Age, years
  < 60 2.8 (2.3, 3.3) 1.5 (1.0, 2.1) 4.1 (3.3, 5.0)
 60–69 15.5 (14.4, 16.8) 10.9 (9.6, 12.4) 20.3 (18.4, 22.4)
 70–79 34.5 (32.8, 36.4) 23.4 (21.4, 25.6) 46.2 (43.3, 49.2)
 80+ 26.8 (25.3, 28.4) 14.3 (12.8, 16.0) 39.9 (37.2, 42.7)
ESR, mm/hr
 ESR < 85 8.2 (7.3, 9.1) 4.5 (3.7, 5.5) 12.0 (10.6, 13.6)
 ESR > 85 8.4 (7.6, 9.3) 6.6 (5.5, 7.7) 10.4 (9.0, 11.8)
b Relative risk (RR) according to time, sex, age and ESR
  1972–1992 1993–2012
RR 95% CI p-value RR 95% CI p-value
Unadjusted
 Time (years) 1.1 (1.1, 1.1) < 0.001 1.0 (1.0, 1.0) 0.543
Sex
 Time (years) 1.1 (1.1, 1.1) < 0.001 1.0 (1.0, 1.0) 0.462
 Sex (Male vs. Female) 0.6 (0.5, 0.8) < 0.001 0.4 (0.3, 0.5) < 0.001
Age
 Time (years) 1.1 (1.1, 1.1) < 0.001 1.0 (1.0, 1.0) 0.135
 60–69 vs. < 60 7.2 (5.1, 10.6) < 0.001 5.0 (3.9, 6.4) < 0.001
 70–79 vs. < 60 15.4 (11.0, 22.5) < 0.001 11.3 (9.1, 14.3) < 0.001
 80+ vs. < 60 9.5 (6.7, 13.9) < 0.001 9.8 (7.8, 12.4) < 0.001
ESR
 Time (years) 1.1 (1.1, 1.1) < 0.001 1.0 (1.0, 1.0) 0.632
 ESR (>median vs. <median) 1.4 (1.1, 1.9) 0.006 0.9 (0.7, 1.0) 0.116
  1. Overall and ESR-specific cumulative incidence reported as cases per 100,000 background population over the age of 50 years. Incidence for sex reported per 100,000 women or men respectively, and incidence for the different age categories reported per 100,000 population of the same age categories (< 60 years, 60–69 years, 70–79 years and 80+ years). Relative risk calculated according to Poisson regression models for the two timeperiods 1972–1992 and 1993–2012
  2. ESR Erythrocyte sedimentation rate
  3. CI Confidence interval