Abstract:
BACKGROUND/AIM:Our previous study with prevalent cases suggested that some genetic, immunological and lifestyle-related factors increased the risk of immunoglobulin A nephropathy (IgAN). To confirm this hypothesis, we conducted another case-control study. METHODS:The study included 116 incident cases and 276 sex-, age- and residence-matched controls in central Japan. Information on family and individual history and on lifestyle was collected using a self-administered questionnaire. The strength of association between IgAN and a potential risk factor was assessed by calculating an odds ratio. RESULTS:A family history of chronic glomerulonephritis, susceptibility to the common cold, episodes of tonsillitis in the preceding year, preference for salty foods and a high intake of rice and n-6 polyunsaturated fatty acids (PUFA) were associated with an increased risk of IgAN. Coffee consumption and dietary calcium intake were somewhat negatively related to the risk. A significance of alcohol drinking, use of vitamin supplements, consumption of raw eggs and intake of nutrients other than n-6 PUFA and calcium, though previously suggested, was not shown in the present study. CONCLUSION:Our findings imply that some genetic factors, immune response to infections in the upper respiratory tract and nutritional imbalance would promote the development of IgAN.
journal_name
Nephronjournal_title
Nephronauthors
Wakai K,Nakai S,Matsuo S,Kawamura T,Hotta N,Maeda K,Ohno Y,Research Group on IgA Nephropathy.doi
10.1159/000046309subject
Has Abstractpub_date
2002-01-01 00:00:00pages
16-23issue
1eissn
1660-8151issn
2235-3186pii
nef90016journal_volume
90pub_type
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