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Table 4 Age-adjusted standardized incidence ratio of Crohn’s disease in female 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=2315) (n=6809)   
Age at diagnosis Observed(Inc)a Observed(Inc)   
>=20, <30 1 (0.56) 35 (6.07) 0.09 0.01–0.65
>=30, <40 3 (0.95) 39 (3.96) 0.24 0.07–0.78
>=40, <50 1 (0.21) 68 (4.21) 0.05 0.01–0.36
>=50, <60 2 (0.53) 57 (4.60) 0.12 0.03–0.49
>=60 1 (0.33) 60 (5.38) 0.06 0.01–0.44
Total 8 (0.48) 259 (4.68) 0.10 0.05–0.20
Age adjusted standardized incidence ratio 0.10 0.05–0.21
  1. 95 % CI 95 % confidence interval; a:observed numbers of new diagnosed Crohn’s disease (incidence per 1000 person-years)