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Table 4 Correlation between RNFL thickness and study parameters in the patients group

From: Optical coherence tomography and cognitive dysfunction in Parkinson disease

RNFL thickness

PDQ-39 Questionnaire

Duration of illness

Age

Severity of disease

Mobility

ADL

Emotional well being

Stigma

Social support

Cognitions

Communication

Bodily discomfort

Superior

− 0.39

− 0.39

− 0.21

− 0.4

− 0.32

− 0.54

− 0.51

− 0.35

− 0.47

− 0.44

− 0.5

P value

0.012*

0.012*

0.2

0.02*

0.04*

< 0.001**

< 0.001**

0.03*

0.002**

0.004**

0.001**

Inferior

− 0.35

− 0.24

− 0.094

0.13

− 0.07

0.02

− 0.12

0.14

− 0.36

− 0.29

− 0.22

P value

0.03*

0.13

0.56

0.43

0.6

0.91

0.52

0.40

0.02*

0.06

0.17

Nasal

− 0.044

− 0.06

0.05

− 0.20

− 0.08

− 0.15

− 0.04

− 0.19

0.034

− 0.30

− 0.19

P value

0.8

0.74

0.8

0.21

0.62

0.37

0.8

0.24

0.83

0.06

0.22

Temporal

− 0.014

− 0.12

0.16

− 0.27

0.08

− 0.15

− 0.14

− 0.095

-0.19

− 0.23

− 0.20

P value

0.93

0.45

0.32

0.09

0.63

0.36

0.38

0.6

0.24

0.17

0.21

Total thickness

− 0.12

− 0.23

0.05

− 0.24

− 0.07

− 0.28

− 0.24

− 0.06

− 0.28

− 0.38

− 0.33

P value

0.46

0.15

0.78

0.14

0.67

0.08

0.13

0.71

0.08

0.02*

0.03*

  1. PDQ-39 Parkinson’s disease questionnaire-39, ADL activities of daily living
  2. * significant difference
  3. ** highly significant difference