Diabetes Care, Vol 20, Issue 8 1256-1260, Copyright © 1997 by American Diabetes Association
IDDM and milk consumption. A case-control study in Sao Paulo, Brazil
SG Gimeno and JM de Souza
Department of Preventive Medicine, Federal University of Sao Paulo, Brazil. suely@medprev.epm.br
OBJECTIVE: To test the hypothesis that breast-feeding is a protective
factor against IDDM and that early exposure to cow's milk is a risk factor
for the disease. RESEARCH DESIGN AND METHODS: A case-control study was
conducted in Sao Paulo, Brazil. A total of 346 diabetic children, aged <
18 years, were identified in two institutions in the city of Sao Paulo.
Duration of exclusive breast-feeding and age of introduction to cow's milk
products in infant diet were compared with 346 sex-, age-, and
neighborhood-matched control children. All comparisons between diabetic and
control children were done using paired tests. RESULTS: Statistically
significant differences were found for the duration of exclusive
breast-feeding (P = 0.007) and for the age of introduction to cow's milk
products (P = 0.047). Control children had a longer time of exclusive
breast-feeding and had received cow's milk later in their diet than the
case children. CONCLUSIONS: The results suggest that a shorter duration of
exclusive breast-feeding is a risk factor for IDDM (odds ratio [OR] 2.13;
95% CI 1.8-3.55) and that the introduction to cow's milk products before
age 8 days is a risk factor for the disease.