Co-distribution of Light At Night (LAN) and COVID-19 incidence in the United States.

BACKGROUND: Light at night (LAN) as a circadian disruption factor may affect the human immune system and consequently increase an individual's susceptibility to the severity of infectious diseases, such as COVID-19. COVID-19 infections spread differently in each state in the United States (US). The current analysis aimed to test whether there is an association between LAN and COVID-19 cases in 4 selected US states: Connecticut, New York, California, and Texas. METHODS: We analyzed clustering patterns of COVID-19 cases in ArcMap and performed a multiple linear regression model using data of LAN and COVID-19 incidence with adjustment for confounding variables including population density, percent below poverty, and racial factors. RESULTS: Hotspots of LAN and COVID-19 cases are located in large cities or metro-centers for all 4 states. LAN intensity is associated with cases/1 k for overall and lockdown durations in New York and Connecticut (P < 0.001), but not in Texas and California. The overall case rates are significantly associated with LAN in New York (P < 0.001) and Connecticut (P < 0.001). CONCLUSIONS: We observed a significant positive correlation between LAN intensity and COVID-19 cases-rate/1 k, suggesting that circadian disruption of ambient light may increase the COVID-19 infection rate possibly by affecting an individual's immune functions. Furthermore, differences in the demographic structure and lockdown policies in different states play an important role in COVID-19 infections.

Feeding difficulties in children with autism spectrum disorder: Aetiology, health impacts and psychotherapeutic interventions.

Feeding difficulties are common and significant issues for children with autism spectrum disorder and their families. Key features of autism are intrinsically linked with factors contributing to these children's feeding difficulties. Following a multidisciplinary assessment to exclude non-behavioural reasons for the feeding difficulty, there are two mainstay modalities of treatment: operant conditioning and systematic desensitisation. Currently, evidence points towards operant conditioning as the most efficacious psychotherapy. However, recent research into cognitive behavioural therapy for older children with feeding difficulties has shown promising results and will be an area to monitor in the coming years. This review outlines the causes and health impacts and evaluates current evidence supporting the available psychotherapeutic interventions for children with autism spectrum disorder experiencing feeding difficulties.