7 after revascularization than for the sf 36 the

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ) after revascularization than for the SF-36. The "ceiling effect", the proportion of individuals having the best possible scores (SF-36 = 100, NHP = 0), was also larger for the NHP scale in emotional reactions (50.0%), energy (42.4%) and social isolation (71.2%) one year after revascularization (Table 3). Validity The average convergent validity coefficients exceeded 0.5 one year postoperatively except for physical mobility and physical functioning (r = -0.46) and for social isolation and social functioning (r = -0.32), indicating a considerable convergence of the SF-36 and NHP (Table 4). One year postoperatively significant correlations between ABPI and physical functioning (r = 0.29) (SF-36), physical mobility (r = 0.42) and pain (r = 0.42) (NHP) were found. The severity of the ischaemia had a significant influence in the Page 4 of 11 (page number not for citation purposes) Health and Quality of Life Outcomes 2004, 2 Pain http://www.hqlo.com/content/2/1/9 Bodily Pain Physical mobility 0 0 10 10 Physical functioning 20 30 20 0 10 20 20 40 30 30 30 50 40 40 40 60 50 50 50 60 60 70 60 70 70 80 70 80 80 90 80 90 100 90 100 0 10 20 30 0 Emotional reactions 10 20 90 100 0 Mental health 10 20 Energy 2 4 6 8 10 12 14 Vitality 0 25 0 0 0 10 10 35 20 45 20 20 30 30 40 55 40 40 50 65 50 60 60 60 70 75 70 80 80 80 85 90 90 100 95 100 0 10 20 30 40 100 0 Social isolation 2 4 6 8 10 12 14 0 10 20 30 0 2 4 6 8 10 12 Social functioning 0 0 20 20 40 40 60 60 80 80 100 100 0 10 20 30 40 50 0 10 20 30 Figure 1 distribution of scores on the NHP (left side) and comparable dimensions on the SF-36 (right side) one year after revascularization Frequency Frequency distribution of scores on the NHP (left side) and comparable dimensions on the SF-36 (right side) one year after revascularization. NHP scores had 100 subtracted for consistency with SF-36 NHP-measured domain of pain (P < .003) and physical mobility (P < .03), indicating lower quality of life scores in patients with critical ischaemia. In the ability to discriminate between levels of ischaemia in the other comparable quality of life domains, no significant differences were found (Table 5). Internal consistency Physical functioning (α = 0.82), mental health (α = 0.76) and vitality (α = 0.70) for the SF-36 and pain (α = 0.71), emotional reactions (α = 0.76) and energy (α = 0.71) for the NHP scale were reliable, with coefficients >0.70 before revascularization. For the SF-36, all of the comparable domains except for social functioning (α = 0.64) exceeded the Cronbach's alpha value of 0.8 at the one-year followup. For the NHP the internal consistency coefficient was less than 0.8 but still exceeded 0.70 (Table 3). Responsiveness The NHP scale and SF-36 were not equally good at detecting within-patient changes over time. In patients with IC the SF-36 scale showed significant improvements in bodily pain (P < .01) and in physical functioning (P < .001) and for the patients with CLI there were significant im...
View Full Document

This document was uploaded on 11/24/2013.

Ask a homework question - tutors are online