Table 3 Concurrent validity of the IDEEL with the SF-36, EQ-5D and Dry Eye Questionnaire (Pearson coefficient correlations)

Dry Eye Symptom-Bother*

Dry Eye Impact on Daily Life

Dry Eye Treatment Satisfaction

Impact on Daily Activities*

Emotional Impact due to Dry Eye*

Impact on Work due to Dry Eye*

Satisfaction with Treatment Effectiveness*

Treatment-related Bother/

Inconvenience*

Physical Functioning

-0.33

0.30

0.35

0.04

0.06

0.35

Role Physical

-0.35

0.30

0.36

0.24

0.15

0.37

Bodily Pain

-0.39

0.34

0.39

0.22

0.14

0.31

Vitality Index

-0.36

0.34

0.40

0.31

0.24

0.38

General Health Perceptions

-0.38

0.32

0.45

0.18

0.17

0.40

Social Functioning

-0.31

0.31

0.40

0.27

0.11

0.35

Role Emotional

-0.27

0.29

0.33

0.20

0.12

0.29

Mental Health Index

-0.32

0.33

0.40

0.13

0.30

0.27

Physical Component Scale

-0.37

0.31

0.38

0.16

0.09

0.37

Mental Component Scale

-0.26

0.29

0.36

0.23

0.23

0.26

EQ-5D Quality of Life Score

-0.36

0.31

0.35

0.24

0.23

0.30

EQ-5D VAS Health Thermometer

-0.34

0.30

0.35

0.22

0.09

0.22

All items (correlation min; correlation max)

0.21; 0.83

-0.19; -0.65

-0.11; -0.69

-0.07; -0.68

-0.05; -0.48

-0.06; -0.60