We evaluated the model accuracy by computing confidence limits on the area under the receiver-operator curve (area-under-curve or AUC), a threshold-independent metric of binary classifier accuracy that adopts a value of 0.5 for null models and 1.0 for perfect discrimination
"However, the impact is asymmetrical: the tendency for adolescents to follow their friends into smoking is stronger." Haas, who worked with David Schaefer, associate professor of human evolution and social change, Arizona State University, said that the addictive effect of nicotine may be the strongest influence on an adolescent's inability to help their friends quit smoking
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The KNHANES data are openly available in a public repository ( The current study used KNHANES (20072019) survey data, which included information on SHS, urine cotinine sampling, smoking history, and ADHD-related history in children and adolescents
