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Early introduction of root vegetables in infancy associated with advanced ß‐cell autoimmunity in young children with human leukocyte antigen‐conferred susceptibility to Type 1 diabetes
Author(s) -
Virtanen S. M.,
Takkinen H.M.,
Nevalainen J.,
KronbergKippilä C.,
Salmenhaara M.,
Uusitalo L.,
Kenward M. G.,
Erkkola M.,
Veijola R.,
Simell O.,
Ilonen J.,
Knip M.
Publication year - 2011
Publication title -
diabetic medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.474
H-Index - 145
eISSN - 1464-5491
pISSN - 0742-3071
DOI - 10.1111/j.1464-5491.2011.03294.x
Subject(s) - medicine , type 1 diabetes , autoimmunity , islet , immunology , diabetes mellitus , antibody , hazard ratio , type 2 diabetes , prospective cohort study , breastfeeding , cohort , insulin , pediatrics , physiology , endocrinology , confidence interval
Diabet. Med. 28, 965–971 (2011) Abstract Aims Early introduction of supplementary foods has been implicated to play a role in the development of ß‐cell autoimmunity. We set out to study the effects of breastfeeding and age at introduction of supplementary foods on the development of ß‐cell autoimmunity. Methods A prospective birth cohort of 6069 infants with HLA‐DQB‐conferred susceptibility to Type 1 diabetes was recruited between 1996 and 2004. Antibodies against islet cells, insulin, glutamate dehydroxylase and islet antigen 2 were measured at 3‐ to 12‐month intervals. The families recorded at home the age at introduction of new foods and, for each visit, completed a structured dietary questionnaire. The endpoint was repeated positivity for islet cell antibodies plus at least one other antibody and/or clinical Type 1 diabetes ( n = 265). Results Early introduction of root vegetables (by the age of 4 months) was related to increased risk of developing positivity for the endpoint [hazard ratio (95% CI) for the earliest third 1.75 (1.11–2.75) and for the middle third 1.79 (1.22–2.62) compared with the last third (> 4 months), likelihood ratio test P = 0.006], independently of the introduction of other foods and of several putative socio‐demographic and perinatal confounding factors. Introducing wheat, rye, oats and/or barley cereals ( P = 0.013) and egg ( P = 0.031) early was related to an increased risk of the endpoint, but only during the first 3 years of life. Conclusions Early introduction of root vegetables during infancy is independently associated with increased risk of ß‐cell autoimmunity among Finnish children with increased genetic susceptibility to Type 1 diabetes.