Annals of dermatology · 2026
Gut-Skin Axis Revisited: A Nationwide Cohort Study on the Bi-directional Relationship Between Rosacea and Irritable Bowel Syndrome.
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Min Joon-Hong, Jo Young Woo, Her Young, Kwon Jae-Woo
Аннотация
BACKGROUND: The gut-skin axis has emerged as a key concept linking cutaneous and gastrointestinal inflammation. Although prior studies have reported an increased risk of irritable bowel syndrome (IBS) among patients with rosacea, the reverse association remains unclear.
OBJECTIVE: To examine the bidirectional association between rosacea and IBS using a nationwide cohort database, clarifying whether IBS increases the risk of rosacea as well as the reverse relationship.
METHODS: We conducted a retrospective cohort study using the Korean National Health Insurance Service-National Sample Cohort (NHIS-NSC), including adults aged ≥20 years from 2002 to 2013. Incident cases of rosacea and IBS were identified using International Classification of Diseases, 10th Revision codes and matched to controls by age, sex, and index year. Cox proportional hazards models were applied to estimate adjusted hazard ratios (aHRs) and 95% confidence intervals (CIs), controlling for sociodemographic and clinical covariates.
RESULTS: During follow-up, patients with rosacea showed a higher incidence of IBS than matched controls (56.3 vs. 36.9 per 1,000 person-years), with a significantly increased risk in the fully adjusted Cox model (aHR, 1.30; 95% CI, 1.11-1.52). Conversely, patients with IBS had a higher incidence of rosacea compared with matched controls (0.37 vs. 0.21 per 1,000 person-years), corresponding to an elevated adjusted risk (aHR, 1.61; 95% CI, 1.39-1.87). These bidirectional associations remained consistent across sensitivity and subgroup analyses.
CONCLUSION: This nationwide study demonstrates a reciprocal relationship between rosacea and IBS, underscoring shared inflammatory and neuroimmune mechanisms underlying the gut-skin axis.
OBJECTIVE: To examine the bidirectional association between rosacea and IBS using a nationwide cohort database, clarifying whether IBS increases the risk of rosacea as well as the reverse relationship.
METHODS: We conducted a retrospective cohort study using the Korean National Health Insurance Service-National Sample Cohort (NHIS-NSC), including adults aged ≥20 years from 2002 to 2013. Incident cases of rosacea and IBS were identified using International Classification of Diseases, 10th Revision codes and matched to controls by age, sex, and index year. Cox proportional hazards models were applied to estimate adjusted hazard ratios (aHRs) and 95% confidence intervals (CIs), controlling for sociodemographic and clinical covariates.
RESULTS: During follow-up, patients with rosacea showed a higher incidence of IBS than matched controls (56.3 vs. 36.9 per 1,000 person-years), with a significantly increased risk in the fully adjusted Cox model (aHR, 1.30; 95% CI, 1.11-1.52). Conversely, patients with IBS had a higher incidence of rosacea compared with matched controls (0.37 vs. 0.21 per 1,000 person-years), corresponding to an elevated adjusted risk (aHR, 1.61; 95% CI, 1.39-1.87). These bidirectional associations remained consistent across sensitivity and subgroup analyses.
CONCLUSION: This nationwide study demonstrates a reciprocal relationship between rosacea and IBS, underscoring shared inflammatory and neuroimmune mechanisms underlying the gut-skin axis.