Fig. 1 Path diagram of 15-item NAVQ-P confirmatory factor analysis. From: Psychometric evaluation of the near activity visual questionnaire presbyopia (NAVQ-P) and additional patient-reported outcome itemsValues associated with arrows represent the factor loadings of each item on the single factor (F1); I = Item. NAVQ-P item concepts shown in legend. Analysis was conducted using responses to NAVQ-P items in the cross-sectional analysis population at Month 2Back to article page