N (%) | RA | CA | IA | ||||
Mean | P values* | Mean | P values* | Mean | P values* | ||
Total | 1783 (100) | 0.57 D | 1.11 D | 0.72 D | |||
Gender | 0.91 | 0.03 | <0.01 | ||||
Boys | 883 (49.5) | 0.57 D | 1.08 D | 0.69 D | |||
Girls | 900 (50.5) | 0.57 D | 1.14 D | 0.75 D | |||
Refraction group (D) | |||||||
SE≤−6.0 | 54 (3.0) | 1.30 D | <0.01 | 1.57 D | <0.01 | 0.65 D | 0.13 |
−6.0<SE≤−3.0 | 371 (20.8) | 0.71 D | <0.01 | 1.24 D | <0.01 | 0.71 D | 0.28 |
−3.0<SE≤–0.5 | 773 (43.4) | 0.49 D | 0.36 | 1.03 D | 0.59 | 0.72 D | 0.37 |
−0.5<SE<+0.5† | 297 (16.7) | 0.47 D | – | 1.05 D | 0.74 D | – | |
+0.5≤SE<+2.0 | 265 (14.9) | 0.49 D | 0.89 | 1.08 D | 0.60 | 0.72 D | 0.44 |
SE≥+2.0 | 23 (1.3) | 0.99 D | <0.01 | 1.39 D | 0.01 | 0.68 D | 0.43 |
*Comparison between boys and girls with χ2 test.
†Reference group.
CA, corneal astigmatism; IA, internal astigmatism; RA, refractive astigmatism; SE, spherical equivalent refraction.