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Table 6 Hierarchical logistic regression of all visual functions on best race time, with VA being forced into the model at step 1, and other visual functions entered with a stepwise method at step 2

From: The Relationship Between Visual Function and Performance in Para Swimming

Variables

χ2w

p

Step 1

 Intercept

13.28

< 0.001

 Visual acuity

10.56

0.001

Step 2

 Intercept

13.28

< 0.001

 Visual acuity

10.56

0.001

 Contrast sensitivity

1.61

0.205

 Light sensitivity

0.03

0.855

 Depth perception

0.82

0.365

 Visual search

0.26

0.613

 Motion perception

1.68

0.195

  1. Bold indicate predictors kept in the model. χw2 refers to Wald Chi-Square. Dummy values for CS, LS, DP, VS and MP were used for participants not able to complete those tests. The goodness of fit Hosmer–Lemshow test was not significant, χ2(7) = 6.67, p = 0.464, indicating good reliability of the model
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