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Table 1 Characteristics of study participants

From: A large nationwide population-based case–control study of the association between intussusception and later celiac disease

  Matched controls Patients with celiac disease
Total, n 144,522 29,096
Age at celiac diagnosis, years (median, range)    * 30; 0–95
Age 0–19, n (%) 58,852 (40.7) 11,802 (40.6)
Age 20–39, n (%) 26,385 (18.3) 5,312 (18.3)
Age 40–59, n (%) 32,254 (22.3) 6,477 (22.3)
Age ≥60, n (%) 27,031 (18.7) 5,505 (18.9)
Entry year (median, range) 1998, 1969–2008 1998, 1969–2008
Females, n (%) 89,544 (62.0) 18,005 (61.9)
Males, n (%) 54,978 (38.0) 11,091 (38.1)
Calendar year   
−1989, n (%) 20,378 (14.1) 4,105 (14.1)
1990–99, n (%) 59,874 (41.4) 12,059 (41.4)
2000, n (%) 64,270 (44.5) 12,932 (44.4)
Country of birth   
Nordic# 136,279 (94.3) 28,139 (96.7)
Data on intussusception
Intussusception n (%) 143 (0.10) 34 (0.12)
Age at first intussusception, years (median, range) 1 (0–60) 3 (0–68)
Intussusception with surgery/radiology, n (%) 31 (0.02) 8 (0.03)
  1. * Reference individuals were matched for age. The median age at matching was 30 years (range 0–95 years).
  2. # Sweden, Denmark, Finland, Norway and Iceland.