Table 5. Risk of likely myopia in first born versus non-first born subjects in the ALSPAC cohort.
Note that sample size differs between the adjusted and unadjusted analyses due to missing information for some children.
| Unadjusted | Adjusted | |||||
|---|---|---|---|---|---|---|
|
|
||||||
| N | OR (95% CI) |
P-value | N | OR (95% CI) |
P-value | |
|
|
||||||
| Including only children | ||||||
| Likely myopic vs. likely not myopic |
4401 | 1.18 (1.01-1.38) |
0.038 | 2499 | 1.31 (1.05-1.64) |
0.016 |
| Likely myopic vs. likely emmetropic/hyperopic |
2939 | 1.23 (1.05-1.46) |
0.014 | 1679 | 1.41 (1.11-1.78) |
0.004 |
| Excluding only children | ||||||
| Likely myopic vs. likely not myopic |
3527 | 1.16 (0.97-1.38) |
0.102 | 2194 | 1.37 (1.07-1.74) |
0.012 |
Adjusted analyses included the variables: The number of myopic parents, the social class of parents, time spent reading for pleasure and maternal age.