What is already known about this topic?

Symptoms of malnutrition including anemia, stunting, wasting, and being underweight among children remained one of the major public health problems in poorer areas in China. More research is needed to guide interventions to improve nutrition and health among children in low-income regions.

What is added by this report?

The prevalences of anemia, stunting, wasting, and being underweight were 51.9%, 25.6%, 14.6%, and 9.5%, respectively, among children aged 6 to 24 months in the poorest areas of Liangshan. Associated factors were gender, age, education level and occupation of mother, breastfeeding, and caregiver knowledge.

What are the implications for public health practice?

Improving caregiver knowledge of nutrition and child feeding practices is crucial to address malnutrition among children. These findings can help more precisely understand the child health needs in poorer areas in order to develop effective interventions. They also provide evidence-based information to formulate child health promotion strategies in other countries with similar situations.

What is already known about this topic?

Few studies have elucidated the relationships between ambient ozone and respiratory morbidity, especially in developing countries.

What is added by this report?

This study involved 5 cities in China with a wide variation in ozone concentrations and therefore could add credible evidence for the associations between short-term ozone exposure and increased respiratory morbidity.

What are the implications for public health practice?

The results could be used to better assess disease burden of short-term exposure to ozone and further guide policymaking for reducing ozone air pollution and improving public health.