Between 2002 and 2004, National Taiwan University Public Health Department head Chen Wei-chien interviewed teenagers in Taipei's trendy eastern district about their substance use, and when the numbers were added up, the proportion who had tried drugs crept up to 10.8 %. In Taipei County, the figure was 5.09 %.
針對街頭青少年所做的調查數字更高，2002 ∼ 2004 年間，台大公衛系主任陳為堅在台北市東區街頭訪問青少年所得的「自陳報告」，曾經使用藥物的盛行率竟高達 10.8％；台北縣則為 5.09％。