Validation Of The New Cataract And Lens Ophthalmique Questionnaire (Cloq)

To evaluate patient reported outcome measurement (PROM) with a new questionnaire for both, questions of Quality of Live (QoL) and Quality of Vision (QoV) befor and after cataract surgery.

AugenCentrum und Augenklinik Rosenheim, Deutschland

Prospective monocentric study with 3 groups of IOL (monofocal, monofokal+, multifocal) to evaluate Rasch-Analysis, 339 patients with bilateral cataract surgery and completed pre- and postoperative (1 month) questionnaire were included. Exclusion criterion was an expected visual acuity of less than 0.5 Snellen (0.3 logMAR). The questionnaire consists of 37 questions with questions of QoL, QoV frequency of wearing glasses and general satisfaction with the situation after surgery. 5 response categories are available for all questions related to the severity and intensity of problems. Statistical analysis is performed  descriptively and by analyzing the questionnaire scale within the Item Response Theory (IRT) framework.

512 questionnaires of 256 patients with monofocal IOL confirmed the validity of the patient questionnaire. The CLOQ shows clear differences between pre- and postoperative for QoL and QoV in the Rasch analysis. 80 patients showed 1 year after surgery the same results for the Rasch analysis. Results in respect for the frequency of wearing glasses were better than after 1 month. Questionnaires of 33 patients with monofocal+ and 33 patients with trifocal IOLs are correlated to the monofocal IOL.

These data represent reallife data. With this paper based CLOQ we do have one validated instrument to measure PRO for both QoL and QoV. These experiences and results of further discussions with other surgeons will be adopted into a small modification for the CLOQ questionnaire.