Saratov JOURNAL of Medical and Scientific Research

Assessment of reproducibility and constructive validity of the methodology for the study of quality of life in cataract surgery "Phacoemulsification of cataract (PEC) — 22"


Abstract. Objective: to evaluate the reproducibility and constructive validity of the "Phacoemulsification of cataract (PEC) — 22" technique for the study of the patient's quality of life in cataract surgery. Material and methods. Two series of clinical studies were carried out. The first one was aimed at evaluation of repeatability indices of the assessed technique based on triple examination of 39 patients with unilateral cataract before and after PEC. The second series aimed to assess the indices of constructive validity based on general testing index in patients (n=33) with different maximal corrected visual acuity in far distance (less than 0.4; 0.4-0.6 and 0.9-1.0 rel. units). Results. The overall testing rate at triplicate examination of patients by the "PEC-22" method before operation varied within 1.3-1.5% (p>0.05), after operation —within 1.1-1.5% (p>0.05). Marked (by 18,3; 24,3; 47,0%, p<0,001) differences in the total testing index between groups of patients with different maximum corrected visual acuity were revealed. Conclusion. The developed "PEC-22" technique is characterized by the required level of reproducibility and constructive validity indices that ensures introduction of the given method in complex diagnostics of cataract patients both before and after surgical intervention.

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