What is the dependent and independent variable in this situation?

Question by ZachsGirl107: What is the dependent and independent variable in this situation?
A study was done on male and female adolescents involving drug use. Researchers examined how male and female adolescents develop drug abuse problems, seek treatment and how they respond to treatment. Some aspects that varied between genders are drug use frequency, clinical signs and symptoms and attendance at drug clinics. It was predicted that male adolescents would have higher drug use levels and higher scores on specific scales, such as the consequences of use scale and the dependence scale. Female adolescents could have higher levels of emotional disorders that may cause drug use. Females were predicted to have a higher score on specific scales such as psychological reasons for use and emotional consequences. The results backed these claims.

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