非法藥物與人格特質的關係：應用網路匿名問卷調查

The Relationship between Personality and Illicit Drug Use

研究目的：網路是獲得非法藥物資訊的重要管道，因此本研究以網路調查非法藥物使用的盛行率與危險因素。研究方法：樣本以滾雪球抽樣，透過網路發放問卷，並匿名調查研究參與者特性、人格特質及非法藥物使用，以SAS統計軟體分析危險因子。研究結果：研究樣本共兩波，第一波自104年7月15日至11月15日，收案358人，第二波自105年09月01日至11月30日，收案78人，總共436人。樣本中有非法藥物使用經驗共34位，盛行率為7.79%。藥物使用種類最多是愷他命，其來源半數由朋友提供（50%），危險因素為年輕族群、男性、高教育程度、及追求新奇程度較高者。非法藥物使用者的追求新奇分數總分、及四個次量表分數均較非使用者為高。以多變項邏輯斯迴歸控制了其他可能干擾的因子之後，發現高衝動程度者發生非法藥物使用的危險性是低衝動程度者的2.74倍（OR = 2.74, 95% C.I. = 1.04-7.21）。研究結論：本研究非法藥物使用之盛行率高於過去研究，顯示網路匿名問卷是貼近該族群的調查方式。追求新奇是非法藥物使用的重要因素，其中衝動程度是關鍵的面向。

Purpose: The internet contains an extraordinary amount of information on illicit substances and plays an important role in illicit substances delivery. This internet-based survey study was designed to understand the prevalence of illicit use and to analyze related risk factors, especially for personality traits. Methods: We used snowball sampling and delivered an anonymous online questionnaire through social media to estimate the size of the hidden population as well as to identify their personality characteristics and illicit substance use experiences. Lifetime prevalence of illicit drug use was calculated and the odds ratios of personality traits on illicit drug use were also estimated by applying multiple logistic regression models. Results: In two waves, a total of 436 participants responded, including 34 illicit substance users (7.79%). The most used illicit substance was ketamine obtained from friends (50%). Risk factors included being young, male, highly educated, and novelty seeking. Compared to tobacco and alcohol users, illicit substance users had higher mean novelty-seeking scores (M = 18.08), and the highest mean scores on the four subscales in terms of exploratory excitability, impulsiveness, extravagance, and disorderliness. Multiple logistic regression showed that impulsiveness was the only risk factor, and people with high impulsiveness were at 2.74 times more risk. Conclusions: The prevalence of illicit substance use identified was higher than in past studies, which indicates that anonymous online questionnaires provide an appropriate way to gather information on illicit substance use. Novelty seeking is an important risk factor for illicit substance use, especially for those with higher impulsiveness scores.