Table 1 Baseline characteristics of the study cohort, captured from 1 April 2002 to 31 March 2012, stratified by age of diabetes diagnosis
Young-onset diabetes | Matches | Standardized difference | Usual-onset diabetes | Matches | Standardized difference | |
|---|---|---|---|---|---|---|
N = 47,710 | N = 47,710 | N = 405,723 | N = 405,723 | |||
Age (years; mean ± standard deviation) | 33.3 ± 4.9 | 33.3 ± 4.9 | 0.00 | 59.8 ± 11.8 | 59.8 ± 11.8 | 0.00 |
Women | 24,939 (52.3%) | 24,939 (52.3%) | 0.00 | 200,205 (49.3%) | 200,205 (49.3%) | 0.00 |
Ethnicity | ||||||
South Asian | 4,084 (8.6%) | 4084 (8.6%) | 0.00 | 11,893 (2.9%) | 11,893 (2.9%) | 0.00 |
Chinese | 1,716 (3.6%) | 1716 (3.6%) | 0.00 | 18,605 (4.6%) | 18,605 (4.6%) | 0.00 |
General | 41,910 (87.8%) | 41,910 (87.8%) | 0.00 | 375,225 (92.5%) | 375,225 (92.5%) | 0.00 |
Socioeconomic status quintile | ||||||
1 (lowest) | 13,342 (28.0%) | 10,105 (21.2%) | 0.16 | 89,331 (22.0%) | 69,980 (17.2%) | 0.12 |
2 | 10,725 (22.5%) | 9939 (20.8%) | 0.04 | 88,940 (21.9%) | 77,530 (19.1%) | 0.07 |
3 | 9657 (20.2%) | 9478 (19.9%) | 0.01 | 82,202 (20.3%) | 78,884 (19.4%) | 0.02 |
4 | 8279 (17.4%) | 9620 (20.2%) | 0.07 | 77,265 (19.0%) | 84,646 (20.9%) | 0.05 |
5 (highest) | 5575 (11.7%) | 8490 (17.8%) | 0.17 | 67,277 (16.6%) | 94,042 (23.2%) | 0.17 |
Primary care visits (median, IQR) | 4 (2–8) | 2 (0–4) | 0.65 | 5 (2–8) | 3 (1–6) | 0.50 |