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  • Title: Factors predicting course of beta-cell function in IDDM.
    Author: Schiffrin A, Suissa S, Weitzner G, Poussier P, Lalla D.
    Journal: Diabetes Care; 1992 Aug; 15(8):997-1001. PubMed ID: 1505333.
    Abstract:
    OBJECTIVE: The purpose of this study was to determine whether the severity o clinical presentation, sex, age, HLA type, and the presence of IAs and ICAs could predict the variation of residual insulin secretion as measured by the serum C-peptide response to a Sustacal meal. RESEARCH DESIGN AND METHODS: A cohort of 151 newly diagnosed IDDM children (mean age 10.2 +/- 4.6 yr) was followed prospectively for 3 yr. Thirty-five patients (12 males, 23 females) were still secreting C-peptide after 36 mo. RESULTS: We found that age (P = 0.0001), sex (P = 0.003), presence of ICA (P = 0.006), severity of clinical presentation (P = 0.001), and symptom duration (P = 0.002) significantly predicted the rate of loss of C-peptide secretion. The risks of accelerated C-peptide disappearance decreased with increasing age, the risk ratios being 0.25 for the older group (greater than 12 yr) compared with the younger group (less than 6 yr) and 0.50 for the intermediate group (6-12 yr) compared with the younger group. The risk for the presence of ICA was 1.7, and the risk for males was 1.7 also. There was a significant negative correlation between ICA titers and C-peptide at 18 and 24 mo after diagnosis (P = 0.04). There were no significant differences in HbA1 values between patients who secreted C-peptide and those who did not. CONCLUSIONS: We conclude that younger age of onset, male sex, high titers of ICA, severe clinical presentation, and shorter symptom duration significantly predict accelerated rates of loss of C-peptide secretion.
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