Table 1.
Comparison of clinical and demographic variables by C-peptide status
| Variable | <10 pmol/l n = 201 |
10–200 pmol/l n = 89 |
p for <10 pmol/l vs 10–200 pmol/l | 10–50 pmol/l n = 58 |
p for <10 pmol/l vs 10–50 pmol/l |
|---|---|---|---|---|---|
| Age at diagnosis (years) | 15 (9–25) | 23 (14–28) | <0.001 | 21 (14–30) | <0.001 |
| Duration of diabetes (years) | 25 (15–34) | 15 (9–24) | <0.001 | 17 (10–28) | <0.001 |
| Current age (years) | 43 (31–53) | 39 (31–53) | 0.560 | 41 (31–54) | 0.975 |
| BMI (kg/m2) | 26.6 (23.7–30.0) | 27.2 (24–30.6) | 0.327 | 27.2 (24.2–30.7) | 0.319 |
| HbA1c (mmol/mol) | 57 (52–67) | 58 (52–65) | 0.845 | 57 (52–64) | 0.607 |
| HbA1c (%) | 7.4 (6.9–8.3) | 7.5 (6.9–8.1) | 7.4 (6.9–8.0) | ||
| Obese | 51/200 (25.5%) | 27/89 (30.3%) | 0.392 | 19/58 (32.8%) | 0.274 |
| Male | 108/201 (53.7%) | 53/89 (59.6%) | 0.358 | 34/58 (58.6%) | 0.510 |
| CSII | 60/201 (29.9%) | 22/89 (24.7%) | 0.371 | 16/58 (27.6%) | 0.739 |
| Any retinopathy | 137/201 (68.2%) | 42/89 (47.2%) | <0.001 | 27/58 (46.6%) | 0.039 |
| Any retinal photocoagulation therapy | 35/201 (17.4%) | 11/89 (12.4%) | 0.277 | 10/58 (17.2%) | 0.976 |
| Under specialist ophthalmology review | 53/201 (26.4%) | 17/89 (19.1%) | 0.182 | 14/58 (24.1%) | 0.733 |
| Elevated urinary albumin/creatinine ratio | 29/200 (14.5%) | 14/88 (15.9%) | 0.757 | 10/58 (17.2%) | 0.608 |
Data are presented as median (IQR) or as n/N (%)