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. 2012 Aug 10;26(11):1402–1411. doi: 10.1038/eye.2012.168

Table 4. Partial correlation analysis of RLVT, clinical measures, and the NEI-VFQ-25—after adjusting for age, years of education, MMSE, SDS, and the RT.

Variables Task 1 Task 2 Task 3 Task 4 Task 5 Task 6 NEI-VFQ-25
VA (logMAR)
 Distance
  Binocular 0.44** 0.46** 0.60** 0.59** 0.54** 0.58** −0.22
  Better eye 0.47** 0.46** 0.64** 0.61** 0.57** 0.57** −0.18
  Worse eye 0.18 0.23 0.14 0.18 0.29* 0.27* −0.42**
               
 Near
  Binocular 0.72** 0.64** 0.62** 0.74** 0.54** 0.53** −0.11
  Better eye 0.68** 0.59** 0.67** 0.74** 0.54** 0.55** −0.12
  Worse eye 0.22 0.22 0.18 0.33* 0.16 0.21 −0.40*
               
 Intermediate
  Binocular 0.59** 0.60** 0.65** 0.58** 0.52** 0.58** 0.01
  Better eye 0.54** 0.58** 0.57** 0.53** 0.40* 0.62** 0.03
  Worse eye 0.24 0.23 0.29* 0.29* 0.22 0.32* −0.31*
               
Stereopsis 0.27* 0.22 0.08 0.31* 0.16 0.14 −0.49**
Color vision 0.42** 0.20 0.26* 0.28* 0.12 0.20 0.09
               
CS (log units)
 85 cd/m2
  1.5 cpd −0.58** −0.55** −0.69** −0.58** −0.45** −0.51** 0.01
  3.0 cpd −0.54** −0.54** −0.60** −0.68** −0.48** −0.45** 0.12
  6.0 cpd −0.47** −0.41* −0.38* −0.60** −0.29* −0.36* 0.25
  12.0 cpd −0.26* −0.19 −0.17 −0.32* −0.06 −0.24 0.21
  18.0 cpd −0.23 −0.15 −0.25 −0.21 −0.05 −0.14 0.21
               
 3 cd/m2
  1.5 cpd −0.51** −0.51** −0.59** −0.49** −0.36* −0.38* 0.02
  3.0 cpd −0.48** −0.46** −0.54** −0.53** −0.36* −0.30* 0.19
  6.0 cpd −0.29* −0.31* −0.43** −0.44** −0.29* −0.25 0.15
  12.0 cpd −0.36* −0.43** −0.28* −0.50** −0.22 −0.24 0.31*
  18.0 cpd −0.20 −0.30* −0.21 −0.17 0.03 −0.11 0.25
               
CS with glare (3 cd/m2)
 1.5 cpd −0.51** −0.51** −0.52** −0.43** −0.40* −0.26* 0.16
 3.0 cpd −0.32* −0.26* −0.39* −0.27* −0.22 −0.23 0.23
 6.0 cpd −0.51** −0.57** −0.46** −0.48** −0.29* −0.31* 0.29*
 12.0 cpd 0.09 0.10 −0.03 −0.14 −0.24 0.02 0.11
               
NEI-VFQ-25 −0.05 −0.06 −0.08 −0.20 −0.16 −0.17 1.00

Abbreviations: cpd, cycles per degree; CS, contrast sensitivity; logMAR, logarithm of the minimum angle of resolution; NEI-VFQ-25, t25-item National Eye Institute Visual Functioning Questionnaire; RLVT, real-life vision test; Task 1, reading and Chinese character-picking task; Task 2, reading and Chinese character-picking task in the reduced illumination; Task 3, Fruit and vegetable picking; Task 4, buttons matching; Task 5, street sign/billboard recognition; Task 6, face recognition; VA=visual acuity.

All the correlative results of the 18.0 cpd (contrast sensitivity with glare (3 cd/m2)) were 0, so they were not included in the Partial correlation.

*P<0.05 and **P<0.001.