Early screening of childhood ASD at primary care hospitals in western China: a multi-center study in Chengdu, Sichuan Province

In summary, the ABC score and child's age emerged as the most robust indicators of ASD in primary care hospitals. The effects of AWS and CHAT-23 support their utility as components in a multi-tool screening cascade. These findings support the practical value of integrated, tiered screening strategies in real-world public health settings.