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RACE AND THE ENFORCEMENT OF DRUG DELIVERY LAWS IN ...

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as the goal is to provide samples of this population that are representative of the<br />

state and national population, the number of people surveyed in any particular<br />

city, including Seattle, is not especially large. 42 In addition, although the<br />

surveyed population is representative of the target population at the state level,<br />

the Seattle respondent population may not be representative of the Seattle<br />

population. In particular, as a result of comparatively small sample sizes, the<br />

survey results for non-white Seattle residents are considered unreliable and are<br />

suppressed; only the results for white respondents and for all survey<br />

respondents were considered reliable and reported by federal researchers.<br />

Finally, like all surveys, the SAMHSA survey relies upon self-reporting of illicit<br />

behavior. 43 The results should therefore be interpreted with caution.<br />

According to survey data provided by federal researchers at SAMHSA, 44 18.5<br />

percent of Seattle residents aged 12 or older and surveyed from 2002 to 2006<br />

reported using an illegal drug other than marijuana in the past year; another 8.5<br />

percent reported using an illegal drug other than marijuana in the past month. 45<br />

Among those reporting serious drug use in the past year, ecstasy, powder<br />

cocaine 46 and crack cocaine were the most widely used (by 5.1, 3.4, and 2.5<br />

percent of Seattle residents, respectively). Among those reporting serious drug<br />

use in the past month, powder cocaine, methamphetamine and crack cocaine<br />

42 The number of respondents varied by question. On average, approximately 450 Seattle<br />

residents responded to each survey question.<br />

43 There is evidence that relying on self-reports generally leads to underestimates of drug use<br />

(and other stigmatized behaviors) (see Chen et al. 2006; Lu, Taylor and Riley 2001;<br />

Soldbergsdottir et al. 2004). These studies also indicate that respondents are most likely to lie<br />

about their use of highly stigmatized drugs, particularly heroin (ibid). On the other hand,<br />

SAMHSA researchers make sophisticated efforts to solicit honest answers from survey<br />

respondents. In particular, the survey incorporates “procedures that would be likely to increase<br />

respondents' cooperation and willingness to report honestly about their illicit drug use<br />

behavior. Confidentiality is stressed in all written and oral communications with potential<br />

respondents. Respondents' names are not collected with the data, and computer-assisted<br />

interviewing (CAI) methods, including audio computer-assisted self-interviewing (ACASI), are<br />

used to provide a private and confidential setting to complete the interview . . . The interviewer<br />

requests the selected respondent to identify a private area in the home to conduct the interview<br />

away from other household members” (see SAMHSA’s 2006 National Survey on Drug Use and<br />

Health, Appendix A1).<br />

44<br />

The results for Seattle residents only were provided to the author of this report by Dr. James<br />

Colliver, Division of Population Surveys, Office of Applied Studies, Substance Abuse and Mental<br />

Health Services Administration.<br />

45<br />

This category includes the drugs shown in Figure 1 as well as heroin, hallucinogens,<br />

stimulants, inhalants, and the non-medical use of pain relievers, tranquilizers, and sedatives.<br />

46 The SAMHSA survey question regarding cocaine specifically includes all forms of cocaine (see<br />

SAMHSA 2007, Appendix C). To estimate the percentage of respondents who used powder<br />

cocaine, the percent reporting that they used crack was subtracted from the percent reporting<br />

that they used any form of cocaine.<br />

20

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