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Table 3 Age-adjusted standardized incidence ratio of Crohn’s disease in male scleroderma patients stratified by age

From: Reduced incidence of Crohn’s disease in systemic sclerosis: a nationwide population study

  Systemic sclerosis Control Incidence Ratio 95 % CI
  (n = 514) (n = 1448)   
Age at diagnosis Observed(Inc)a Observed(Inc)   
> = 20, <40 1 (1.31) 16 (7.03) 0.19 0.03–1.43
> = 40, <50 1 (1.59) 9 (4.21) 0.38 0.05–2.97
> = 50 1 (0.59) 37 (5.35) 0.11 0.02–0.79
Total 3 (0.97) 62 (5.47) 0.18 0.06–0.57
Age adjusted standardized incidence ratio 0.18 0.05–0.62
  1. 95 % CI 95 % confidence interval; a:observed numbers of new diagnosed Crohn’s disease (incidence per 1000 person-years)