Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa học đề tài : Psychometric evaluation of a visual analog scale for the assessment of anxiety | Williams et al. Health and Quality of Life Outcomes 2010 8 57 http content 8 1 57 I HEALTH AND QUALITY OF LIFE OUTCOMES RESEARCH Open Access Psychometric evaluation of a visual analog scale for the assessment of anxiety Valerie SL Williams 1 Robert J Morlock2 and Douglas Feltner3 Abstract Background Fast-acting medications for the management of anxiety are important to patients and society. Measuring early onset however requires a sensitive and clinically responsive tool. This study evaluates the psychometric properties of a patient-reported Global Anxiety - Visual Analog Scale GA-VAS . Methods Data from a double-blind randomized placebo-controlled study of lorazepam and paroxetine in patients with Generalized Anxiety Disorder were analyzed to assess the reliability validity responsiveness and utility of the GA-VAS. The GA-VAS was completed at clinic visits and at home during the first week of treatment. Targeted psychometric analyses test-retest reliabilities validity correlations responsiveness statistics and minimum important differences were conducted. Results The GA-VAS correlates well with other anxiety measures at Week 4 r p with the Hamilton Rating Scale for Anxiety and r p with the Hospital Anxiety and Depression Scale - Anxiety subscale. In terms of convergent and divergent validity the GA-VAS correlated p p and p with the SF-36 Emotional Role Social Function and Mental Health subscales respectively but correlated much lower with the SF-36 physical functioning subscales. Preliminary minimum important difference estimates cluster between 10 and 15 mm. Conclusions The GA-VAS is capable of validly and effectively capturing a reduction in anxiety as quickly as 24 hours post-dose. Single-item visual analog scales VASs have been used in psychological assessment since the early 20th century and have subsequently been employed successfully in the assessment of a wide variety of .
