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Table 4 Clinical validity of the IDEEL (Pearson correlation coefficients)

From: Development and validation of the impact of dry eye on everyday life (IDEEL) questionnaire, a patient-reported outcomes (PRO) measure for the assessment of the burden of dry eye on patients

Clinical tests IDEEL Modules   
  Dry Eye Symptom-Bother* Impact 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*
Snellen visual acuity 0.22** -0.25** -0.24** -0.09 -0.07 -0.25**
Bulbar redness 0.18** -0.15** -0.22** -0.18 0.01 -0.25**
Schirmer 1 tear test (mm) -0.30** 0.14** 0.24** 0.11 0.09 0.37**
Fluorescein break up time (sec) -0.22** 0.17** 0.20** 0.22** 0.01 0.28**
Overall corneal fluorescein staining rating 0.31** -0.21** -0.25** -0.30** 0.06 -0.32**
Conjunctival lissamine green staining rating 0.30** -0.17** -0.25** -0.29** 0.03 -0.31**
  1. * Number of patients ranging from 206 to 209 for Dry Eye Symptom-Bother, Impact on Daily Activities and Emotional Impact due to Dry Eye; ranging from 129 to 131 for Impact on Work due to Dry Eye; ranging from 135 to 137 for Satisfaction with Treatment Effectiveness; ranging form 151 to 154 for Treatment -Related Bother/Inconvenience
  2. ** p < 0.05