Table 1.
Demographic characteristics and comparison of comorbid disorders between the diabetes mellitus and control groups
| Diabetes mellitus (n=239 854) | Control (n=239 854) | P value | |
| n (%) | n (%) | ||
| Age (years), mean±SD | 55.08±14.86 | 55.08±14.86 | >0.999 |
| Age (years) | |||
| 20–49 | 91 232 (38.04%) | 91 232 (38.04%) | >0.999 |
| 50–64 | 85 616 (35.70%) | 85 616 (35.70%) | |
| ≥65 | 63 006 (26.27%) | 63 006 (26.27%) | |
| Gender | |||
| Male | 133 638 (55.72%) | 133 638 (55.72%) | >0.999 |
| Female | 106 216 (44.28%) | 106 216 (44.28%) | |
| Baseline comorbidities | |||
| Hypertension | 74 296 (30.98%) | 26 099 (10.88%) | <0.0001 |
| Hyperlipidaemia | 24 892 (10.38%) | 6091 (2.54%) | <0.0001 |
| Chronic renal disease | 5972 (2.49%) | 2235 (0.93%) | <0.0001 |
| Keratoconjunctivitis sicca | 517 (0.22%) | 388 (0.16%) | <0.0001 |
| RCE | 1236 (0.52%) | 884 (0.37%) | <0.0001 |
| Overall follow-up time, years | |||
| Median (Q1–Q3) | 9.27 (8.43–10.12) | 9.33 (8.51–10.15) | <0.0001 |
| Time to RCE, years | |||
| Median (Q1–Q3) | 4.08 (1.63–6.72) | 4.15 (1.82–6.60) | 0.6503 |
Demographic characteristics and comorbid disorders were compared between the diabetes mellitus and control groups by using McNemar’s test. The mean age was estimated using paired t-test, and the median of follow-up time and time to RCE were calculated with Wilcoxon’s signed rank test.
RCE, recurrent corneal erosion.