Table 2. Demographics of the study population and distribution of quantitative variables.
| N | N miss | mean | SD | Min | Q1 | Median | Q3 | Max | |
|---|---|---|---|---|---|---|---|---|---|
| Systemic parameters (persons) | |||||||||
|
Body weight [kg] |
1973 | 0 | 79.8 | 15.9 | 45.6 | 68.5 | 78.7 | 89.1 | 162.2 |
| Body length [cm] | 1973 | 0 | 170.4 | 9.3 | 137.0 | 163.4 | 170.2 | 177.0 | 198.5 |
| BMI | 1973 | 0 | 27.44 | 4.74 | 17.17 | 24.21 | 26.82 | 29.93 | 52.27 |
| Cholesterol [mg/dL] | 1968 | 5 | 222.7 | 42.0 | 70 | 194 | 220 | 248 | 419 |
| HbA1c [%] | 1965 | 8 | 5.66 | 0.58 | 4.5 | 5.3 | 5.6 | 5.9 | 11.6 |
| Glucose [mg/dL] | 1969 | 4 | 92.6 | 16.0 | 49 | 84 | 90 | 97 | 290 |
| Homocysteine | 1960 | 13 | 11.9 | 4.6 | 4.6 | 9.3 | 11.1 | 13.6 | 73.0 |
| Ocular parameters (eyes) | |||||||||
| Spherical equivalent | 3217 | 7 | -0.29 | 2.14 | -12.5 | -1.13 | -0.13 | 0.88 | 8.00 |
| Intraocular pressure | 3156 | 68 | 14.89 | 2.91 | 7.00 | 13.00 | 14.7 | 16.7 | 26.7 |
| Axial length | 2901 | 323 | 23.62 | 1.15 | 18.29 | 22.92 | 23.57 | 24.27 | 28.48 |
| Central corneal thickness | 2890 | 334 | 548.5 | 34.5 | 405 | 525 | 549 | 571 | 773 |
| RNFLT global | 3224 | 0 | 96.1 | 10.4 | 48 | 90 | 96 | 103 | 207 |
N = number of cases; N miss = number of missing cases, SD = standard deviation, Min = minimum, Q1 = quantile 1, Q3 = quantile 3, Max = maximum, BMI = body mass index, RNFLT = retinal nerve fiber layer thickness.