Agència de Salut Pública de Barcelona, Pl. Lesseps 1, 08023 Barcelona, Spain; Institut d'Investigació Biomèdica (IIB Sant Pau), C/ Sant Antoni Maria Claret 167, 08025 Barcelona, Spain; Centros de Investigación Biomédica en Red. Epidemiología y Salud Pública (CIBERESP), C/ Melchor Fernández Almagro, 3-5, 28029 Madrid, Spain; Departament de Psicobiologia i Metodologia en Ciències de la Salut, Universitat Autònoma de Barcelona, Campus UAB, 08193 Bellaterra, Spain.
Agència de Salut Pública de Barcelona, Pl. Lesseps 1, 08023 Barcelona, Spain; Institut d'Investigació Biomèdica (IIB Sant Pau), C/ Sant Antoni Maria Claret 167, 08025 Barcelona, Spain; Centros de Investigación Biomédica en Red. Epidemiología y Salud Pública (CIBERESP), C/ Melchor Fernández Almagro, 3-5, 28029 Madrid, Spain.
Int J Drug Policy. 2017 Dec;50:11-18. doi: 10.1016/j.drugpo.2017.07.033. Epub 2017 Sep 26.
To estimate the effect of opening two services for people who use drugs and three police interventions on the number of discarded syringes collected from public spaces in Barcelona between 2004 and 2014.
We conducted an interrupted time-series analysis of the monthly number of syringes collected from public spaces during this period. The dependent variable was the number of syringes collected per month. The main independent variables were month and five dummy variables (the opening of two facilities with safe consumption rooms, and three police interventions). To examine which interventions affected the number of syringes collected, we performed an interrupted time-series analysis using a quasi-Poisson regression model, obtaining relative risks (RR) and 95% confidence intervals (CIs).
The number of syringes collected per month in Barcelona decreased from 13,800 in 2004 to 1655 in 2014 after several interventions. For example, following the closure of an open drug scene in District A of the city, we observed a decreasing trend in the number of syringes collected [RR=0.88 (95% CI: 0.82-0.95)], but an increasing trend in the remaining districts [RR=1.11 (95% CI: 1.05-1.17) and 1.08 (95% CI: 0.99-1.18) for districts B and C, respectively]. Following the opening of a harm reduction facility in District C, we observed an initial increase in the number collected in this district [RR=2.72 (95% CI: 1.57-4.71)] and stabilization of the trend thereafter [RR=0.97 (95% CI: 0.91-1.03)].
The overall number of discarded syringes collected from public spaces has decreased consistently in parallel with a combination of police interventions and the opening of harm reduction facilities.
评估在 2004 年至 2014 年间，巴塞罗那为吸毒者开设两家服务机构和三次警方干预措施对从公共空间收集的废弃注射器数量的影响。
我们对这段时间内从公共空间收集的每月注射器数量进行了中断时间序列分析。因变量为每月收集的注射器数量。主要的自变量是月份和五个虚拟变量（开设两家安全使用房间服务机构和三次警方干预措施）。为了检验哪些干预措施影响了收集的注射器数量，我们使用准泊松回归模型进行了中断时间序列分析，得出相对风险（RR）和 95%置信区间（CI）。
巴塞罗那每月收集的注射器数量从 2004 年的 13800 个减少到 2014 年的 1655 个，这是在多次干预之后发生的。例如，在该市 A 区一个开放毒品现场关闭后，我们观察到收集的注射器数量呈下降趋势[RR=0.88（95%CI：0.82-0.95）]，但在其余地区呈上升趋势[RR=1.11（95%CI：1.05-1.17）和 1.08（95%CI：0.99-1.18），分别为 B 区和 C 区]。在 C 区开设减少伤害设施后，我们观察到该地区收集的注射器数量最初增加[RR=2.72（95%CI：1.57-4.71）]，此后趋势稳定[RR=0.97（95%CI：0.91-1.03）]。
随着警方干预措施和减少伤害设施的开放，从公共空间收集的废弃注射器总数持续下降。
