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Published on: September 26, 2019
Increased risk of idiopathic nephrotic syndrome in children with atopic dermatitis
Chang-Ching Wei1, Jeng-Dau Tsai, Cheng-Li Lin
1Department of Pediatrics, China Medical University Hospital, Taichung, Taiwan.
Insights
Children with atopic dermatitis (AD) have a doubled risk of developing idiopathic nephrotic syndrome (INS). This risk is higher in females and increases with AD severity and frequency of medical visits.
Area of Science:
- Pediatric Nephrology
- Dermatology
- Epidemiology
Background:
- Previous studies suggest a link between atopic diathesis and idiopathic nephrotic syndrome (INS).
- A large-scale population cohort study was needed to clarify the relationship between atopic dermatitis (AD) and INS.
Purpose of the Study:
- To investigate the incidence and risk of idiopathic nephrotic syndrome (INS) in children with atopic dermatitis (AD).
Main Methods:
- A population-based cohort study using Taiwanese claims data from 1998-2007.
- 192,295 children with newly diagnosed AD were compared to 769,169 matched controls.
- Incidence rates and hazard ratios (HRs) for INS were calculated.
Main Results:
- Children with AD had a 2-fold higher incidence of INS compared to controls (7.20 vs. 3.60 per 100,000 person-years).
- The HR for INS increased with age, was higher in females, and correlated with AD severity (more medical visits).
- The risk of INS significantly increased within 5 years after AD onset.
Conclusions:
- Children diagnosed with atopic dermatitis exhibit a significantly higher incidence and risk of developing idiopathic nephrotic syndrome.
- The risk of INS in children with AD escalates with disease severity and is particularly pronounced in the initial years post-diagnosis.
Background:
Clinical and immunological studies have consistently shown a relationship between atopic diathesis and idiopathic nephrotic syndrome (INS). However, no large population cohort study has yet to demonstrate the nature of the relationship between these disorders.
Methods:
Claims data from a random selection of children representing half of the insured population in Taiwan were examined. During the period from 1998 to 2007, we identified 192,295 children aged <18 years with newly diagnosed atopic dermatitis (AD) and 769,169 frequency-matched controls. Incidence of INS and hazard ratios (HRs) were calculated.
Results:
The AD cohort had a 2-fold higher overall incidence of INS than the non-AD cohort [7.20 vs. 3.60 per 100,000 person-years, respectively; 95 % confidence interval (CI) 1.50-2.66]. The HR for INS increased with age and was higher among females. The HR for INS was also higher in AD children with more medical visits per year, ranging from 0.94 for those having ≤3 visits to 38.6 for those having >6 visits (trend test P < 0.0001). In particular, the risk of INS clearly increased during the initial 5 years after AD onset.
Conclusions:
Children with AD have a greater incidence and risk of developing INS and this risk increases with AD severity.
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