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Table 3 Corneal astigmatism characteristics converted to vector nomenclature and correlation with age

From: Gender-differences in age-related changes of corneal astigmatism in Korean cataract patients

Parameter

Mean (D) ± SD

Range

P valuea

Correlation coefficientb

P value

Men

 J0 (D)

  ACA

0.078 ± 0.50

− 1.20, 1.70

 

− 0.541

< 0.001

  PCA

− 0.136 ± 0.09

− 0.38, 0.15

0.000

0.316

< 0.001

  TCA

−0.057 ± 0.54

− 1.45, 1.55

0.004

− 0.533

< 0.001

 J45 (D)

  ACA

−0.005 ± 0.24

−0.61, 0.62

 

−0.083

0.224

  PCA

−0.034 ± 0.06

−0.17, 0.20

0.071

0.044

0.516

  TCA

−0.039 ± 0.24

−0.74, 0.59

0.107

−0.045

0.363

Women

 J0 (D)

  ACA

0.124 ± 0.49

−1.15, 1.75

 

−0.415

< 0.001

  PCA

−0.136 ± 0.09

−0.38, 0.15

0.000

0.266

< 0.001

  TCA

−0.002 ± 0.51

−1.54, 1.60

0.009

− 0.395

< 0.001

 J45 (D)

  ACA

−0.006 ± 0.28

−1.15, 0.90

 

0.019

0.789

  PCA

−0.022 ± 0.06

−0.19, 0.18

0.576

0.065

0.362

  TCA

−0.027 ± 0.29

−1.22, 1.15

0.336

0.032

0.657

  1. ACA anterior corneal astigmatism, D diopter, PCA posterior corneal astigmatism, SD standard deviation, TCA total corneal astigmatism
  2. J0 and J45 are the astigmatic components
  3. aBased on the Mann–Whitney nonparametric test for independent samples between ACA and PCA or ACA and TCA
  4. bBased on the Spearman rho for the correlation between each parameter and age