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Background: Retinopathy of prematurity (ROP) is a sight-threatening disease affecting extremely preterm infants. The introduction of new ROP screening surveillance systems, with higher sensitivity and specificity than established ROP screening guidelines, has the potential to reduce the number of stressful eye examinations in these infants. Objectives: To improve the specificity of the WINROP (Weight, Insulin-like growth factor-I, Neonatal, ROP) surveillance system, identifying extremely preterm infants requiring treatment for ROP. Methods: Two cohorts that had previously been subjected to WINROP analyses were included and reevaluated in this study. The weight at WINROP alarm for extremely preterm infants, born at gestational age <27 weeks, was reevaluated and by establishing 'safe' WINROP alarm weight limits, an intersample reassessment of WINROP alarm was performed. The two cohorts were as follows: (1) the Extremely Preterm Infants in Sweden Study (EXPRESS) cohort, infants born in Sweden during 2004-2007 (n = 407), and (2) extremely preterm infants in a North American cohort, born during 2006-2009 (n = 566). Results: In the EXPRESS cohort, 12.5% (40/319) of the infants who previously received a WINROP alarm were now reassessed as having no alarm; the specificity of WINROP in EXPRESS increased from 23.9% (86/360) to 35.0% (126/360). In the North American cohort, 15.4% (81/526) were reassessed as having no alarm; the specificity increased from 8.5% (38/447) to 26.6% (119/447). The sensitivity persisted as 97.5% in EXPRESS (45/47) and 98.3% (117/119) in the North American cohort. Conclusions: The specificity of the WINROP surveillance system for extremely preterm infants can be significantly improved by reassessment using the weight at WINROP alarm.

PURPOSE: The aim was to investigate outcomes of powered wheelchair and scooter interventions after 4-months and 1-year use regarding need for assistance when moving around, frequency of mobility-related participation, easiness/difficulty in mobility during participation, and number of participation aspects performed in everyday life. METHOD: The study was a prospective cohort study, using an instrument focusing on mobility-related participation outcomes of mobility device interventions (NOMO 1.0), at baseline, after 4-months and 1-year use. RESULTS: The results show that the outcomes in terms of participation frequency and easiness in mobility occur in a short time perspective, and that the effects remained stable at 1-year follow-up. The frequency of going for a walk increased most prominently (26%). Even though the majority of the participation aspects were not performed, more often they became easier to perform: 56-91% found that shopping, walking and visiting family/friends were easier. Moreover, independence outdoors and indoors increased. CONCLUSIONS: This small study provides knowledge about the outcomes of powered wheelchairs and scooters in terms of mobility and mobility-related participation in real-life situations. The study supports results from former studies, but even so, larger studies are required in order to provide evidence for the effectiveness of powered wheelchairs and scooters. [Box: see text].