Table 1 Characteristics of participants.
| Characteristics | No CD, n (%) (n = 64 118) | CD, n (%) (n = 13 358) |
|---|---|---|
| Age at first‐recorded diagnosis of CD (years) | ||
| 0–15 | — | 9349 (70.0) |
| 16 | — | 4009 (30.0) |
| Sex | ||
| Males | 25 957 (40.5) | 5439 (40.7) |
| Females | 38 161 (59.5) | 7919 (59.3) |
| Calendar period | ||
| 1964–73 | 2368 (3.7) | 490 (3.7) |
| 1974–83 | 18 336 (28.6) | 3789 (28.4) |
| 1984–93 | 28 717 (44.8) | 5950 (44.5) |
| 1994–2003 | 14 697 (22.9) | 3129 (23.4) |
| SEI | ||
| I | 6922 (10.8) | 1446 (10.8) |
| II | 8641 (13.5) | 2018 (15.1) |
| III | 19 303 (30.1) | 4972 (37.2) |
| Missing data | 29 252 (45.6) | 4922 (36.8) |
| Diabetes mellitus* | ||
| Yes | 1262 (2.0) | 769 (5.8) |
| Hypertensive disease† | ||
| Yes | 1253 (2.0) | 238 (1.8) |
| Positive events† | ||
| Myocardial infarction | 1032 (1.6) | 233 (1.7) |
| Angina pectoris | 934 (1.5) | 240 (1.8) |
| Heart failure | 1228 (1.9) | 300 (2.2) |
| Brain haemorrhage | 232 (0.4) | 66 (0.5) |
| Ischaemic stroke | 842 (1.3) | 198 (1.5) |
CD, coeliac disease; SEI, socioeconomic index.
Subjects with >1 year of follow‐up after diagnosis of coeliac disease (CD) or, in matched subjects, the corresponding date.
“I” is the highest category. For reference individuals, we have given the number of individuals who constituted the basis for the Cox regression. We actually had data on SEI in another 5879 reference individuals, but these individuals were not part of the internally stratified calculations, owing to missing values on SEI in the matched individuals with CD. Adding the 5879 reference individuals to those presented above, the proportion of missing values was found to be similar among individuals with CD and among those without CD.
*The inpatient registry does not distinguish between type 1 and type 2 diabetes mellitus.
†Number of positive events before the end of follow‐up. Does not include first year after study entry (and diagnosis of CD).