Intra-rater reliability

About: Intra-rater reliability is a research topic. Over the lifetime, 2073 publications have been published within this topic receiving 140968 citations.

Measuring disease activity and damage in discoid lupus erythematosus

Abstract: Summary Background Discoid lupus erythematosus (DLE) is a disfiguring inflammatory skin disease. There is no specific tool for measuring disease severity. Objectives To determine the features needed in a score measuring activity and damage in DLE and to investigate the score’s reliability and its correlation with the physician’s global assessment of disease severity and the patient-reported Dermatology Quality of Life Index (DLQI). Methods The content of the score was determined following a peer review, pilot work in patients and a preliminary inter-rater reliability study. The Score of Activity and Damage in DLE (SADDLE) measures severity of activity (erythema, scale, induration) and damage (scarring/atrophy and dyspigmentation) attributable to DLE. Summed scores range between 0 and 195. Inter- and intrarater reliability of the score was tested using six assessors and nine patients with DLE. Intraclass correlation coefficients (ICCs) > 0·7 were considered evidence of good inter- and intrarater agreement. Results The mean ± SD SADDLE score of nine patients in the inter-rater reliability study was 47 ± 22 (range 14–102). There was good inter-rater agreement for the total score [ICC 0·82; 95% confidence interval (CI) 0·61–0·95] and for the activity and damage scales, the individual physical signs and the total scores at individual body sites. The total score demonstrated excellent intrarater reliability (ICC 0·98; 95% CI 0·86–1·00). Although there was poor inter-rater agreement for global assessments (ICC 0·28; 95% CI 0·06–0·66), a good correlation was demonstrated between total scores and global assessments (r = 0·7). A weaker positive correlation was observed between disease activity scores and DLQI (r = 0·4). Conclusions The SADDLE measures activity and damage in patients with DLE. It demonstrates good inter- and excellent intrarater agreement, over and above that for global assessment. It correlates well with global assessment scores. Further studies are required to investigate SADDLE’s responsiveness to change with therapy.

The Reliability of the Occupational Therapy Adult Perceptual Screening Test (OT-APST):

Abstract: The Occupational Therapy Adult Perceptual Screening Test (OT-APST) is designed to screen for impairments in visual perception and apraxia in adults following stroke. The OT-APST is a comprehensive battery that contains 25 items in the following seven subscale areas: agnosia (5 items); visuospatial relations covering elements of body scheme (4 items) and unilateral neglect (5 items); constructional skills (3 items); apraxia (6 items); acalculia (1 item); and functional skills (5 items). Several OT-APST items contribute to more than one subscale, hence there is a difference in the number of items in each subscale and the overall number of items. This study reports three aspects of the reliability of the OT-APST: interrater, intrarater and test-retest reliability. The participants in the interrater and intrarater reliability study were 15 people following stroke. Videotaped OT-APST performance was scored by nine occupational therapists and the results compared with the scores of the first author as the gold-standard rater. The participants in the test-retest reliability study were 10 people who were neurologically stable one year after stroke and were assessed 2 weeks apart on the OT-APST. The results obtained for each of the 25 OT-APST items included intraclass correlation coefficients (Type 3,1) for interrater reliability ranging from 0.66 to 1.0, for intrarater reliability ranging from 0.64 to 1.0, and for test-retest reliability ranging from 0.76 to 0.95. These results indicate that the OT-APST has good interrater, intrarater and test-retest reliability and offers a reliable screening tool for use by occupational therapists working in the area of stroke.

Reliability of Electronic Components: A Practical Guide to Electronic Systems Manufacturing

Abstract: Introduction State of the Art in Reliability Reliability of passive electronic parts Reliability of Diodes Reliability of Silicon Transistors Reliability of Thyristors Reliability of Integrated Circuits Reliability of Hybrids Reliability of Memories Reliability of Optoelectronics Noise and Reliability Plastic Package and Reliability Test and Testability of Logic ICs Failure Analysis Appendix.