Table 1.
Groups | |||||
---|---|---|---|---|---|
Healthy | DM Without DR | NPDR | PDR | P | |
Subjects, n | 18 | 22 | 17 | 15 | — |
Age (y), mean ± SD | 38.7 ± 11.2 | 49.3 ± 14.3 | 45.5 ± 13.1 | 50.4 ± 13.1 | 0.040* |
Sex (female), n (%) | 10 (56) | 13 (59) | 10 (59) | 5 (33) | 0.409 |
Refractive error (D), mean ± SD | −1.32 ± 2.21 | −2.93 ± 2.65 | −2.15 ± 1.88 | −0.56 ± 1.74 | 0.024*,† |
Missing, n (%) | 1 (5) | 3 (14) | 5 (29) | 2 (13) | |
Intraocular length, mean ± SD | 24.10 ± 1.41 | 24.29 ± 1.04 | 24.21 ± 1.24 | 23.83 ± 1.28 | 0.885† |
Missing, n (%) | 11 (61) | 9 (41) | 9 (53) | 9 (60) | — |
DM type (type 1), n (%) | — | 10 (45) | 13 (76) | 6 (40) | 0.075 |
DM duration (y), mean ± SD | — | 13.9 ± 11.2 | 23.2 ± 11.0 | 20.4 ± 10.4 | 0.030*,† |
HbA1c, mean ± SD | — | 6.8 ± 0.9 | 7.1 ± 0.7 | 7.6 ± 1.4 | 0.063† |
All statistical tests for P values were nonparametric Kruskal–Wallis, unless indicated otherwise. Age showed a significant difference among groups (P < 0.05) but was not significantly different in any pairwise comparisons (all P > 0.05). Refractive error in DM without DR was significantly lower than in PDR (P < 0.05). DM duration was longer in NPDR compared with DM without DR (P < 0.05). HbA1c, hemoglobin A1c.
Statistically significant (P < 0.05).
Parametric one-way ANOVA.