Clinical Summary: Contextualizing the Relationship Between Social Isolation and Substance Abuse
Social isolation is common in clinical practice, but its association with substance use disorder is easy to miss when patients present through general medical hospitalization rather than addiction treatment. This study highlights that hospitalized adults coded for social isolation had higher rates of smoking, alcohol use disorder, cannabis use disorder, stimulant use disorder, and opioid-related disorders, with important sex, race, and psychiatric comorbidity patterns.
Key Findings
- Among hospitalized patients, the prevalence of smoking was 49.3% vs 36.1%, alcohol abuse was prevalent among 14.4% vs 4.9% of patients, and cannabis use disorder was 14.6% vs 1.4% in patients with social isolation versus without social isolation.
- Within the 2,050 patients with social isolation diagnostic codes, substance use was more common in younger adults aged 19 to 44 years (57.4% vs 41.8%), males (64.7% vs 53.8%), and the black race (25.8% vs 13.1%).
- Among socially isolated patients, substance abuse was associated with higher psychiatric comorbidity for anxiety disorder (55.9% vs 45.3%) and bipolar disorder (23.5% vs 16.4%).
- Sex-stratified analyses among socially isolated patients showed higher prevalence in males than females for smoking (56.6% vs 40.1%), alcohol use disorder (16.7% vs 11.5%), cannabis use disorder (19.3% vs 8.8%), stimulant use disorder (19.7% vs 12.1%), and opioid-related disorders (18.0% vs 14.8%).
- Among socially isolated patients stratified by race, smoking (48.1% vs 63.9% vs 33.3%), cannabis use disorder (13.5% vs 27.9% vs <1%), stimulant use disorder (15.5% vs 24.6% vs 12.5%), and opioid-related disorder (17.2% vs 16.4% vs <1%) showed higher prevalence among the black race compared to white and Hispanic races, while alcohol abuse showed no major differences (15.2% vs 14.8% vs 12.5%).
When social isolation is documented in hospitalized adults, screen actively for substance use disorder and co-occurring anxiety disorder and bipolar disorder. In Contextualizing the Relationship Between Social Isolation and Substance Abuse, social isolation identified a subgroup with substantially higher substance burden and higher hospitalization cost despite similar length of stay.
Practice Implications
- Treat documented social isolation as a practical cue to assess for smoking, alcohol use disorder, cannabis use disorder, stimulant use disorder, and opioid-related disorders rather than limiting the evaluation to the admitting medical problem.
- Expect higher substance use burden among socially isolated males and black patients, and use that information to guide more deliberate screening and discharge planning.
- When a socially isolated inpatient has substance abuse, assess for anxiety disorder and bipolar disorder because these comorbidities were more prevalent at 55.9% and 23.5%, respectively.
- Because length of stay was similar but hospitalization cost was higher among socially isolated patients with substance use, include social support and connection-building interventions in inpatient and transition planning.
