Table 2.
Baseline Characteristics of the Children Study Population
| Examination at 6 Years | Examination at 9 Years | |||
|---|---|---|---|---|
| Genotype and myopia status known | N | 4132 | N | 3390 |
| Risk allele (% A) | 4132 | 48.5 | 3390 | 48.3 |
| TT | 1082 (26.2) | 899 (26.5) | ||
| AT (one risk allele) | 2094 (50.7) | 1702 (50.2) | ||
| AA (two risk alleles) | 956 (23.1) | 789 (23.3) | ||
| Ethnicity (% European) | 4132 | 3559 (86.1) | 3390 | 2979 (87.9) |
| Gender (% male) | 4132 | 2072 (50.1) | 3390 | 1679 (49.5) |
| Age (y) | ||||
| Mean (SD) | 4132 | 6.2 (0.5) | 3390 | 9.8 (0.3) |
| Range | 4.8–9.0 | 8.5–12.0 | ||
| Myopia (n (%yes)) | 4132 | 92 (2.2) | 3390 | 392 (11.6) |
| SER (D) | ||||
| Mean (SD) | — | — | 1453 | 0.72 (1.32) |
| Range | −9.81 to 8.31 | |||
| AL (mm) | ||||
| Mean (SD) | 3877 | 22.37 (0.75) | 3284 | 23.11 (0.84) |
| Range | 17.54–28.88 | 17.68–27.72 | ||
| CR (radius mm) | ||||
| Mean (SD) | 3660 | 7.78 (0.26) | 3278 | 7.79 (0.26) |
| Range | 6.94-9.07 | 6.93–8.79 | ||
| AL/CR | ||||
| Mean (SD) | 3824 | 2.87 (0.08) | 3276 | 2.97 (0.10) |
| Range | 2.38–3.90 | 2.40–3.53 | ||
| ACD (mm) | ||||
| Mean (SD) | 3539 | 3.31 (0.32) | 3218 | 3.57 (0.26) |
| Range | 1.46–6.31 | 2.01–5.14 | ||
| AL elongation (mm) | ||||
| Mean (SD) | — | — | 2894 | 0.41 (0.17) |
| Range | 0–1.65 | |||
| Lens power (D) mS | ||||
| Mean (SD) | — | — | 1339 | 23.33 (1.51) |
| Range | 18.60–29.40 | |||
| Lens power (D) BR | ||||
| Mean (SD) | — | — | 1278 | 23.35 (1.52) |
| Range | 18.63–29.38 | |||
mS, modified Stenström; BR, Bennett-Rabbetts.