Table 1 Demography of the eyes in different CC quartiles.

From: Associations between corneal curvature and other anterior segment biometrics in young myopic adults

Number of eyes

1st quartile

2nd quartile

3rd quartile

4th quartile

P value

1975

1973

1972

1973

CC (D)*

41.42 ± 0.68

42.66 ± 0.25

43.55 ± 0.27

44.83 ± 0.66

 < 0.001

Age (years)*

23.98 ± 5.04

24.69 ± 5.24

25.43 ± 5.42

26.45 ± 5.60

 < 0.001

Female (no, %)

544 (15.65%)

758 (21.80%)

998 (28.70%)

1177 (33.85%)

 < 0.001

Spherical error (D)*

 − 4.52 ± 1.80

 − 4.63 ± 1.83

 − 4.87 ± 1.97

 − 5.09 ± 2.24

 < 0.001

Astigmatism (D)*

 − 0.66 ± 0.53

 − 0.74 ± 0.61

 − 0.79 ± 0.65

 − 0.81 ± 0.66

 < 0.001

Spherical equivalent (D)*

 − 4.82 ± 1.85

 − 4.97 ± 1.90

 − 5.24 ± 2.05

 − 5.48 ± 2.32

 < 0.001

  1. CC corneal curvature, D diopter.
  2. *Presented as mean ± standard deviation.