Influence of frame rate in detecting oropharyngeal aspiration in paediatric videofluoroscopic swallow studies - An observational study.

OBJECTIVES: The videofluoroscopic swallow study (VFSS), currently the gold standard for assessing aspiration in children, incurs radiation. Adhering to the ALARA principle is crucial in minimising radiation dose whilst obtaining accurate diagnostic information in children. International adult VFSS guidelines recommend a capture rate of 30 frames per second (fps). Higher capture rates increase radiation yet there is limited evidence on best practice VFSS capture rates in children, particularly on thin fluid consistency-the fastest viscosity with the highest potential for missed aspiration on slower capture rates. We aimed to determine if image acquisition at 30fps versus 15fps alters the accuracy of detecting aspiration when assessing thin fluids during paediatric VFSS. MATERIALS & METHODS: Seventeen speech language pathologists (SLPs) blindly rated a total of 2,356 swallow loops for the presence/absence of aspiration from VFSS recordings of 13 infants/children drinking thin fluids. 76 swallow loops were randomly presented at 15 versus 30fps, on two occasions. Area under receiver operating curve (aROCs) was used to compare the accuracy of aspiration ratings at 15 versus 30fps compared to a comparison set. The intraclass correlation coefficient (ICC) was used to examine rater reliability. RESULTS: Accuracy for detecting aspiration was near-identical at 15fps (aROC:0.97; 95%CI:0.96-0.97) and 30fps (0.96; 95%CI 0.96-0.97). Good inter-rater (ICC:0.82; 95%CI:0.72-0.89) and intra-rater reliability among the raters (ICC:0.89; 95%CI:0.82-0.93) was found. CONCLUSION: Using 15fps in paediatric VFSS when assessing thin fluid consistency aspiration provides a similar detection rate to using 30fps. As 15fps would have a lower radiation dose than 30fps, we recommend using 15fps when undertaking VFSS in children. CLINICAL RELEVANCE STATEMENT: Adhering to the ALARA principles, a capture rate of 15fps should be used in paediatric VFSS for assessment on thin fluids.

Early psychosis in central Vietnam: A longitudinal study of short-term functional outcomes and their predictors.

BACKGROUND: Few longitudinal studies have investigated the functional outcomes of individuals with recent-onset psychotic illness in low- and middle-income countries. AIMS: To investigate short-term functional remission and its predictors in a central Vietnamese sample. METHODS: A naturalistic 6-month prospective cohort study recruited 79 patients of public health facilities who had experienced a first episode of schizophrenia or related illness in the past 18 months. Individuals and their family members were interviewed using standardised assessments of community functioning, symptoms, treatment, demographics and various psychosocial variables. Rates of functional remission (i.e. no or minimal impairment) were calculated based on rigorous, culturally appropriate criteria. Generalised estimating equations were used to explore predictors of remission. RESULTS: Rates of global functional remission were 28% at baseline and 53% at follow-up. In individual functional domains, remission was least common for occupational activities, intermediate for relationships and relatively common for daily living activities. Global functional remission was significantly associated with absence of negative and cognitive symptoms, average or better household economic status and unimpaired premorbid functioning. CONCLUSION: Remission rates appeared similar to those seen in many international intervention studies. However, individuals from poor households had markedly unfavourable outcomes, suggesting the need for community-based interventions targeting low-socioeconomic status (SES) groups.