Table 4. Prevalence of Child Astigmatism in Different Combinations of Parental Astigmatism Severities in 5708 Trios.
| Parental astigmatism status | Children, No. | Age of children, mean (SD), y | Prevalence of child astigmatism, % (95% CI) |
|---|---|---|---|
| Parental refractive astigmatism status | |||
| No astigmatism plus no astigmatism | 2530 | 7.35 (0.87) | 21.6 (20.0-23.2)a |
| No astigmatism plus mild astigmatismb | 1904 | 7.32 (0.87) | 22.5 (20.6-24.4)a |
| Mild astigmatism plus mild astigmatism | 343 | 7.31 (0.86) | 27.6 (23.0-32.7)a |
| High astigmatism plus no astigmatism | 654 | 7.22 (0.87) | 31.5 (28.0-35.3)a |
| High astigmatism plus mild astigmatism | 221 | 7.31 (0.88) | 37.3 (30.9-44.0)a |
| High astigmatism plus high astigmatism | 41 | 7.27 (0.79) | 43.9 (28.5-60.3)a |
| Overall | 5693 | 7.32 (0.87) | 24.2 (23.1-25.3)a |
| Parental corneal astigmatism status | |||
| No astigmatism plus no astigmatism | 1785 | 7.39 (0.87) | 51.0 (48.7-53.4)c |
| No astigmatism plus mild astigmatism | 2101 | 7.32 (0.87) | 61.1 (59.0-63.3)c |
| Mild astigmatism plus mild astigmatism | 623 | 7.33 (0.86) | 67.0 (63.2-70.8)c |
| High astigmatism plus no astigmatism | 551 | 7.26 (0.86) | 67.6 (63.5-71.5)c |
| High astigmatism plus mild astigmatism | 382 | 7.17 (0.86) | 77.1 (72.5-81.2)c |
| High astigmatism plus high astigmatism | 51 | 7.22 (0.90) | 84.0 (70.9-92.8)c |
| Overall | 5493 | 7.33 (0.87) | 60.5 (59.2-61.8)c |
a
Prevalence of child refractive astigmatism.
b
This group contained trios of mothers without astigmatism plus fathers with mild astigmatism, as well as trios of fathers without astigmatism plus mothers with mild astigmatism. The same is applied to all 6 groups.
c
Prevalence of child corneal astigmatism.