A systematic review of 11 cross-sectional studies found consistent associations between smartphone addiction and both suicidal ideation and suicide attempts , with a dose-response pattern: higher addiction severity correlated with greater odds across adolescents, college students, and young adults.
Researchers conducted a systematic review synthesizing evidence on smartphone addiction's relationship with suicidal ideation (SI) and suicide attempts (SA). They searched four major databases (PubMed, Embase, Web of Science, and Cochrane Library) for peer-reviewed English-language studies published between 1971 and August 2025. Eleven cross-sectional studies met inclusion criteria, with most demonstrating high methodological quality according to the Newcastle-Ottawa Scale. The geographic distribution was heavily skewed toward East Asia: nine studies were conducted in South Korea, one in China, and one in the United States.
The central finding was a consistent positive association between smartphone addiction and suicidal ideation across multiple populations. Among adolescents, college students, and young adults, high-risk smartphone users showed substantially elevated odds of experiencing suicidal thoughts. The odds ratios ranged from 1.14 to 4.57 depending on the study and population examined, indicating that the most severely affected groups had between 14% and 357% higher odds of SI compared to non-addicted users. Importantly, the review observed a dose-response relationship: as smartphone addiction severity increased, so did the likelihood of suicidal ideation. This pattern suggests a genuine biological or behavioral dose-dependent mechanism rather than simple confounding.
For suicide attempts specifically, the association was also statistically significant in high-risk user groups, with odds ratios ranging from 1.15 to 1.87. While the magnitude of association was somewhat smaller than for suicidal ideation (which is expected given that SA is rarer than SI), the consistency across studies strengthens confidence in the relationship. The review identified several moderating factors that appeared to amplify this relationship: concurrent stress exposure and longer daily usage duration both exacerbated the association between addiction and suicidal outcomes. This suggests smartphone addiction does not act in isolation but rather interacts with other stressors to influence suicide risk.
A critical limitation deserves emphasis: all included studies were cross-sectional in design. Cross-sectional research cannot establish causation, only association. While the dose-response pattern is suggestive of a causal pathway, it remains unknown whether smartphone addiction increases suicide risk, whether individuals experiencing suicidal thoughts seek excessive smartphone use as a coping mechanism, or whether both are driven by an unmeasured third factor (such as underlying depression or anxiety). The geographic clustering of studies in South Korea also raises questions about generalizability to other regions with different patterns of smartphone use and cultural contexts around mental health.
These findings have implications for individuals, families, and public health approaches, though with appropriate caveats about what the evidence actually supports.
For yourself or family members: If you notice patterns of excessive smartphone use co-occurring with mood disturbances, social withdrawal, or suicidal thoughts, this research suggests those patterns merit attention. Reducing usage, particularly during high-stress periods, may be worth exploring. Digital detox and social media limits are practical starting points. Note that this is not established as a suicide prevention strategy but rather a reasonable harm-reduction approach given the observed associations.
For stress management: The review emphasized that stress and usage duration amplified the relationship. During high-stress periods, monitoring smartphone use becomes more relevant. Combining usage reduction with established stress-management techniques like journaling, breathwork, or nature exposure has independent evidence supporting mental health benefits.
For prevention frameworks: Mental health professionals and public health systems should consider problematic smartphone use as one signal among many in suicide risk assessment. However, this should not displace established screening tools or interventions. The cross-sectional nature of the evidence means smartphone addiction is a correlate of suicide risk, not a validated independent predictor.
Important context: Suicidal ideation and attempts are complex outcomes driven by multiple interacting biological, psychological, and social factors. Smartphone addiction is one potential contributor in a much larger system. If you or someone you know is experiencing suicidal thoughts, contact a crisis line or emergency services immediately rather than attempting self-management through habit change alone.
| Characteristic | Details |
|---|---|
| Study Type | Systematic review of cross-sectional studies |
| Number of Studies Included | 11 |
| Sample Size | Not aggregated in abstract |
| Geographic Distribution | 9 South Korea, 1 China, 1 United States |
| Study Quality | 7/11 rated high quality on Newcastle-Ottawa Scale |
| Primary Outcomes | Suicidal ideation and suicide attempts |
| Key Finding | Dose-response relationship between smartphone addiction severity and SI/SA odds (OR: 1.14-4.57 for SI, 1.15-1.87 for SA) |
| Moderating Factors | Stress exposure and daily usage duration |
| Limitations | All included studies cross-sectional; cannot establish causation; limited geographic diversity |
| Journal | PeerJ |
| PubMed ID | 42291422 |
Association between smartphone addiction, suicidal ideation and suicide attempt: a systematic review. PeerJ. PubMed: https://pubmed.ncbi.nlm.nih.gov/42291422/
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