The diagnostic criteria of the glucose metabolism disorders had been established by the World Health Organization (WHO)/National Data Group (NDDG) in the beginning of the 1980's. In 1997, the American Diabetes Association (ADA) suggested new criteria, based upon the interpretation of the fasting glucose. In this study, 56 subjects underwent an oral glucose tolerance test (oGTT), and we have applied both criteria to estimate the prevalence of the glucose metabolism disorders. Out of 56 subjects, 11 (19,6% - Group 1) had been considered glucose intolerants by the criteria of the WHO/NDDG and 6 (10,7% - Group 2) as impaired fasting glycemia (IFG) by the ADA new criteria. We have compared clinical and biochemical variables (age, BMI, insulin peak during oGTT, area under the insulin curve during oGTT and serum concentrations of IGFBP-1) between both groups, not observing differences in any of the variables (43 ± 13 x 46 ± 4.4 years, 29.5 ± 3.2 x 27.2 ± 2.6kg/m², 153.7 ± 100.7 x 171.3 ± 145.6µUI/ml, 12,040 ± 8,488 x 13,970 ± 12,170 e 14.4 ± 9.3 x 19.4 ± 11.8ng/ml, respectively, p = NS). However, when we compare these same variables between the subjects considered normal by the ADA criteria and intolerants by the WHO/NDDG (n = 8, Group 3) and the subjects considered normal by both criteria (n = 42, Group 4), we observed that it also did not have difference in relation to age (42 ± 15 x 38 ± 10 years, respectively, NS), however, Group 3 presents BMI (29.5 ± 3.9 x 24.5 ± 3.5kg/m², respectively, p < 0.02), insulin peak (115.2 ± 29.1 x 84.4 ± 56.5µUI/ml, respectively, p < 0.02) and area under the insulin curve (9,112 ± 2,323 x 6,649 ± 4,438, respectively, p < 0.007)with higher values than Group 4. Group 3 still presented serum concentration of IGFBP-1 with lower values than Group 4 (14.9 ± 10.1 x 28.9 ± 17.6ng/ml, respectively, p < 0.03).
Diabetes mellitus; Diagnostic criteria; WHO; ADA; Impaired glucose tolerance
