A public health researcher reviews two studies on the prevalence of a common neurodevelopmental disorder among children in the United States. The findings are as follows:
- Study 1 (2003-2007): The percentage of children aged 4-17 reported by their parents as having the disorder increased from 7.8% to 9.5%.
- Study 2 (1998-2009): The percentage of children aged 5-17 reported by their parents as having the disorder increased from 6.9% to 9.0%.
Based only on the information provided in these two studies, what is the most logical conclusion the researcher can draw?
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A public health researcher reviews two studies on the prevalence of a common neurodevelopmental disorder among children in the United States. The findings are as follows:
- Study 1 (2003-2007): The percentage of children aged 4-17 reported by their parents as having the disorder increased from 7.8% to 9.5%.
- Study 2 (1998-2009): The percentage of children aged 5-17 reported by their parents as having the disorder increased from 6.9% to 9.0%.
Based only on the information provided in these two studies, what is the most logical conclusion the researcher can draw?