Table 2 Characteristics of participants with at least 1 year of follow-up*
CharacteristicRestricted to inpatientsOriginal cohorts*
Reference (no coeliac disease) (%)Coeliac disease (%)Reference (no coeliac disease) (%)Coeliac disease (%)
Total14 49415 32569 35714 250
Age at first recorded diagnosis of coeliac disease (years)
0–159520 (62.1)9334 (65.5)
⩾165805 (37.9)4916 (34.5)
Age at end of follow-up (years)
0–153365 (23.2)3839 (25.1)18 016 (26.0)3656 (25.7)
⩾1611 129 (76.8)11 486 (74.9)51 341 (74.0)10 594 (74.3)
Sex
Male64 028 (44.2)6369 (41.6)28 475 (41.1)5868 (41.2)
Female8086 (55.8)8956 (58.4)40 882 (58.9)8382 (58.8)
Calendar period of index admission
1964–1973311 (2.1)529 (3.5)2418 (3.5)497 (3.5)
1974–19833541 (24.4)4040 (26.4)19 133 (27.6)3914 (27.5)
1984–19936620 (45.7)6489 (42.3)30 561 (44.1)6256 (43.9)
1994–20034022 (27.7)4267 (27.8)17 245 (24.9)3583 (25.1)
Socioeconomic index†
I1350 (9.3)1595 (10.4)7219 (10.4)1497 (10.5)
II1973 (13.6)2260 (14.7)9208 (13.3)2137 (15.0)
III4377 (30.2)5360 (35.0)19 985 (28.8)5117 (35.9)
Missing data6794 (46.9)6110 (39.9)32 945 (47.5)5499 (38.6)
Diabetes mellitus915 (6.3)1092 (7.1)1967 (2.8)920 (6.5)
  • *Cohorts using the general population reference group. First year of follow-up excluded to minimise the risk of ascertainment bias.

  • †Socioeconomic index. “I” is highest category. For reference individuals from the general population we have given the number of individuals who constituted the basis for the Cox regression. We actually had data on socioeconomic index in another 6442 individuals in the original reference cohort; but these individuals were not part of the internally stratified calculations due to missing values on socioeconomic index in the matched individual with coeliac disease.