Table 5. Comparison of Mean AL Among Various Studies.
| Studya | Ethnicity/Race | Age Group, y | ||||
|---|---|---|---|---|---|---|
| 40-49 | 50-59 | 60-69 | 70-79 | ≥80 | ||
| Women | ||||||
| LALES, 2003 | Latino | 23.2 | 23.2 | 23.1 | 23.1 | 23.0 |
| CHES | Chinese | NA | 23.6 | 23.7 | 23.4 | 23.2 |
| Tanjong Pagar Survey,2001 | Singaporean Chinese | 23.4 | 23.0 | 22.7 | 22.7b | NA |
| Liwan Eye Study, 2009 | Mainland Chinese | 22.8 | 22.9 | 22.8 | 23.0 | |
| Men | ||||||
| LALES, 2003 | Latino | 23.7 | 23.6 | 23.6 | 23.5 | 23.7 |
| CHES | Chinese | NA | 24.1 | 24.3 | 23.9 | 23.9 |
| Tanjong Pagar Survey,2001 | Singaporean Chinese | 23.8 | 23.5 | 23.4 | 23.4b | NA |
| Liwan Eye Study, 2009 | Mainland Chinese | NA | 23.4 | 23.4 | 23.3 | 23.7 |
Abbreviations: AL, axial length; CHES, Chinese American Eye Study; LALES, Los Angeles Latino Eye Study; NA, not applicable.
a
All listed studies measured AL with A-scan ultrasonography.
b
Age range is 70 to 81 years.