Table 1.
Demographic and Genetic Characteristics of the Regression Discontinuity Analysis Sample
| Variable | Statistic | All (n = 21,127) | Born Before Cutoff Date (n = 11,556) | Born After Cutoff Date (n = 9571) | P |
|---|---|---|---|---|---|
| Age | Mean (95% CI) | 52.89 (52.85 to 52.92) | 54.90 (54.88 to 54.93) | 50.45 (50.43 to 50.49) | <2.2E-16 |
| Female | N (%) | 11,881 (56.3%) | 6539 (56.6%) | 5342 (55.9%) | 2.70E-01 |
| Wears glasses | N (%) | 19,492 (92.3%) | 10,956 (94.8%) | 8536 (89.3%) | 2.30E-51 |
| University or College degree | N (%) | 8078 (38.2%) | 4462 (38.6%) | 3616 (37.8%) | 2.20E-01 |
| High genetic predisposition to myopia | N (%) | 10,548 (49.9%) | 5762 (49.9%) | 4786 (50.0%) | 8.50E-01 |
| Refractive error (D) | Median (IQR) | −0.08 (−1.60 to 0.71) | −0.02 (−1.54 to 0.85) | −0.15 (−1.70 to 0.54) | 3.40E-18 |
| Age started wearing glasses (Years) | Median (IQR) | 38.00 (16.00 to 46.00) | 40.00 (15.33 to 47.00) | 35.00 (16.00 to 45.00) | 1.00E-12 |
| Townsend Deprivation Index | Median (IQR) | −1.95 (−3.51 to 0.51) | −2.03 (−3.55 to 0.44) | −1.85 (−3.44 to 0.64) | 9.40E-04 |
Participants were stratified based on being born before or after the cutoff date, i.e. not affected vs. affected by the ROSLA reform.