Does a child's mental age have anything to do with growth and development?

Patient's question:

Just started attending preschool, and the homeroom teacher reported that the child is quite active, doesn't sleep during lunch, loves to talk, doesn't eat much, and tends to cry when criticized. Today, they had an examination at the children's hospital, but the results for trace elements have not come out yet.
Past treatment history and effectiveness: After examination: Gross motor skills 72, fine motor skills 72, adaptive ability 78, language 66, social behavior 69, mental age 71.4, developmental quotient 104.

Doctor's answer:

IQ: IQ = Mental Age (MA) / Chronological Age (CA) 100. The Developmental Quotient (DQ) is one of the core indicators used to assess the cognitive development level of infants and young children. It measures the growth and development of children in areas such as gross motor skills, fine motor skills, worldview, emotional development, and social skills. Therefore, both IQ and DQ are related.
However, some children develop more slowly, so you need to provide guidance and encouragement. Help them with arithmetic and Pinyin, give them confidence, and they will definitely catch up with their classmates in the future!

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