Phthalate esters have been considered closely related with childhood obesity, but the existing studies revealed inconsistent results. This study was desigened to investigate the association between phthalate esters and childhood obesity in China.

The physical activity, dietary intake and the levels of urine phthalate metabolites of children were detected, and the associations between these 3 factors and childhood obesity were analyzed.

Inclusion Criteria:

• Children who were classified as normal, overweight and obesity based on age, gender and BMI.

Exclusion Criteria:

• The participants who were with endocrine disorders.

Students aged 6-8 years from monitoring schools in Shenzhen, China.