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Increased risk of psoriasis following chronic rhinosinusitis without nasal polyps: a population-based matched-cohort
1School of Public Health, Taipei Medical University, Taipei, Taiwan.
Background:
Although chronic rhinosinusitis without nasal polyps (CRSsNP) and psoriasis both share immunological disturbances as pathological factors, no prior study has investigated the risk for psoriasis among patients with CRSsNP.
Objectives:
To investigate the subsequent risk for psoriasis following a diagnosis of CRSsNP by utilizing a cohort study design and a population-based dataset in Taiwan.
Methods:
In total, 13 242 subjects with CRSsNP were included in the study cohort and 39 726 subjects were randomly extracted for the comparison cohort. We individually tracked each individual in this study (n = 52 968) for a 5-year period following their index date to identify those subjects who received a subsequent diagnosis of psoriasis. Cox proportional hazards regression analysis was conducted to calculate the 5-year risk of subsequent psoriasis following a diagnosis of CRS among the sampled subjects.
Results:
The incidence rate of psoriasis during the 5-year follow-up period was 1·41 [95% confidence interval (CI) 1·14-1·71] per 1000 person-years and 0·69 (95% CI 0·59-0·81) per 1000 person-years for the study and comparison cohort, respectively. Stratified Cox proportional hazards regression revealed that the hazard ratio for psoriasis during the 5-year follow-up period for subjects with CRSsNP compared with the control group was 2·01 (95% CI 1·54-2·62) after adjusting for monthly income, geographical region, hypertension, diabetes, coronary heart disease and hyperlipidaemia, and censoring the cases who died during the 5-year follow-up period.
Conclusion:
This study detected an increased risk for psoriasis among patients with CRSsNP.
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