State-Level Increases in Parent-Reported ADHD Prevalence (2003-2007)
Between 2003 and 2007, the rise in parent-reported ADHD prevalence among U.S. children was observed across all sociodemographic groups and was reflected by substantial increases in 12 states. The three states with the largest increases were Indiana, North Carolina, and Colorado.
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Demographics with the Greatest Increase in ADHD Prevalence (2003-2007)
Methodological Limitations of Parent-Reported ADHD Prevalence Studies
Speculative Explanations for the Apparent Rise in ADHD Prevalence
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?
State-Level Increases in Parent-Reported ADHD Prevalence (2003-2007)