Background and purpose Efforts to improve nurses’ physical and mental health are critical to ensuring the safety and quality of the healthcare system. Long-term studies targeting the relevancy of nurses’ occupation characteristics with health conditions remain insufficient. This study aimed to examine the relationship between nurses’ night shift and sleep problems and metabolic abnormalities risk. Methods This study was a part...

This paper constructs and elaborates a theoretical model of urban economic efficiency (UEE) from the perspective of urban scaling law. A framework of urban economic analysis is established with urban population agglomeration capacity (UPAC) as the explanatory factor. Taking the Yangtze River Delta Urban Agglomeration (YRDUA) as a case study, explore the influence of UPAC on UEE. The results show that the gap between the UEE in...