| Literature DB >> 34134108 |
Matthijs Blankers1,2,3, Daan van der Gouwe1, Lavinia Stegemann1, Laura Smit-Rigter1.
Abstract
BACKGROUND: In this article, we present an evaluation of online psychoactive substance trade via Telegram, a free encrypted social media messenger service. The evaluation took place during the COVID-19 pandemic, which allowed us to monitor the effects of the spring 2020 lockdown in the Netherlands on substance trade via Telegram.Entities:
Keywords: COVID-19; Online drug monitoring; Telegram
Year: 2021 PMID: 34134108 PMCID: PMC8339033 DOI: 10.1159/000516853
Source DB: PubMed Journal: Eur Addict Res ISSN: 1022-6877 Impact factor: 3.015
Counts and proportions of all collected Telegram posts related to different substances
| Substance | N | Proportion |
|---|---|---|
| MDMA/ecstasy | 3,043 | 0.0433 |
| Cocaine | 2,112 | 0.0301 |
| Amphetamine | 992 | 0.0141 |
| LSD | 547 | 0.0078 |
| Prescription medication | 460 | 0.0066 |
| Ketamine | 397 | 0.0057 |
| GHB | 263 | 0.0037 |
| 2C-B | 127 | 0.0018 |
| Methamphetamine | 109 | 0.0016 |
| Heroin | 57 | 0.0008 |
| Other common NPS | 37 | 0.0005 |
| Methadone | 13 | 0.0002 |
LSD, lysergic acid diethylamide; 2C-B, 2,5-dimethoxy-4-bromophenethylamine; NPS, new psychoactive substances.
Counts and proportions of Telegram posts before, during, and after the lockdown in the Netherlands
| Substances | Lockdown phase | N | Prop | SE |
|---|---|---|---|---|
| All substances | Before | 3,252 | 0.0822 | 0.00138 |
| All substances | During | 1,571 | 0.0674 | 0.00164 |
| All substances | After | 820 | 0.1120 | 0.00368 |
| Top 3 substances | Before | 2,747 | 0.0694 | 0.00128 |
| Top 3 substances | During | 1,048 | 0.0449 | 0.00136 |
| Top 3 substances | After | 677 | 0.0923 | 0.00338 |
| Psychedelics | Before | 455 | 0.0115 | 0.000536 |
| Psychedelics | During | 368 | 0.0158 | 0.000816 |
| Psychedelics | After | 128 | 0.0175 | 0.00153 |
| Other substances | Before | 473 | 0.0120 | 0.000546 |
| Other substances | During | 512 | 0.0220 | 0.000960 |
| Other substances | After | 157 | 0.0214 | 0.00169 |
Generalized linear mixed modeling of differences in substance-related posts between lockdown phases
| Substances | Lockdown phase | B | SE | z | p value |
|---|---|---|---|---|---|
| All substances | Before versus during | 0.18 | 0.032 | 5.66 | <0.0001 |
| After versus during | 0.43 | 0.046 | 9.41 | <0.0001 | |
| Top 3 substances | Before versus during | 0.43 | 0.038 | 11.51 | <0.0001 |
| After versus during | 0.65 | 0.052 | 12.48 | <0.0001 | |
| Psychedelics | Before versus during | −0.35 | 0.071 | 4.96 | <0.0001 |
| After versus during | 0.0022 | 0.104 | 0.021 | 0.98 | |
| Other substances | Before versus during | −0.64 | 0.064 | 9.88 | <0.0001 |
| After versus during | −0.086 | 0.093 | 0.93 | 0.35 | |
Lockdown phase “during” was the reference group (0) in the regression analyses.
Fig. 1Proportions of posts related to substances before, during, and after the lockdown in the Netherlands.