1.1 general information:
46 children with stunting were selected from a hospital in Qingdao from March 2015 to December 2015, including 24 males and 22 females, the average age was 48.02.23 months. Excluded epilepsy, severe mental illness and other diseases. The control group consisted of 27 boys and 25 girls with an average age of 47.91±3.11 months in a kindergarten in Qingdao. All subjects agreed to participate in the study, and the guardian signed the informed consent.
1.2 Methods
1.2.1 Socio-demographic information
Including family size, economic income, parents' age and education level, was collected by questionnaire, and the demographics data were analyzed. There was no significant difference between male and female (P>0.05) . 1.2.2 screening for stunting. Physical growth was assessed according to the 2005 Growth Reference Standards for children in nine major Chinese cities.Neuropsychological development was assessed by Denver developmental screening and Achenbach Child Behavior Scale.
1.2.3 Evaluation of executive function
Using Dimensional Change Card Sort Task(DCCS)[6] and delayed gratification task[7-8] to evaluate executive function. DCCS scores 1 point for each row of cards according to the rules of color-size and color-shape. In the delayed gratification task, if the child chooses a small sugar box, record the situation; if the child chooses a large sugar box, the experimenter tells the child that he needs to go out for a while, if he can wait until the experimenter comes back, he can get a large sugar box; record the child's wait time (s: S)
All data were analyzed by SPSS 20.0. T test was used to compare the two groups. The test level of statistical analysis α = 0.05.