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Table 2 Age-adjusted standardized incidence ratio of Crohn’s disease in 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 = 2829) (n = 8257)   
Age at diagnosis Observed(Inc)a Observed(Inc)   
> = 20, <30 1 (0.47) 39 (5.84) 0.08 0.01–0.58
> = 30, <40 4 (1.11) 51 (4.55) 0.24 0.09–0.66
> = 40, <50 2 (0.37) 77 (4.21) 0.09 0.02–0.37
> = 50, <60 3 (0.66) 72 (4.62) 0.14 0.04–0.44
> = 60 1 (0.26) 82 (5.51) 0.05 0.01–0.36
Total 11 (0.56) 321 (4.82) 0.12 0.07–0.22
Age adjusted standardized incidence ratio 0.12 0.06–0.22
  1. 95 % CI 95 % confidence interval; a:observed numbers of new diagnosed Crohn’s disease (incidence per 1000 person-years)