Detecting spatiotemporal clusters of tobacco and cannabis use and co-use to inform smartphone-based interventions.

ABSTRACT: Co-use of tobacco and cannabis poses adverse health consequences. Few studies have incorporated spatial analysis into smartphone-based assessments of co-use. This study aims to detect patterns of tobacco and cannabis co-use to inform the delivery of tailored interventions. We analyzed data from 30 young adults aged 18-30 in Northern California who used both tobacco and cannabis. Substance use/nonuse events were collected on participants' smartphones via geographic ecological momentary assessment over 30 days. Substance use events were categorized as tobacco use, cannabis use, or co-use and analyzed using the Space-Time Permutation Scan Statistic to identify distinct spatiotemporal clusters. Cluster characteristics were summarized to further explore use patterns. Substance use events showed

SUBMITTER: Han JJ 

PROVIDER: S-EPMC12774385 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature