OBJECTIVE: The objective of this study was to investigate changes in inflammatory markers in obese individuals with impaired fasting glucose. METHODS: The following data of 125 adult individuals were assessed: body mass index, waist circumference, fasting glucose, high-sensitivity c-reactive protein, uric acid and homocysteine. The groups with normal fasting glucose (group 1) and impaired fasting glucose (group 2) were compared with each other and with their subgroups, which consisted of obese, overweight and normal-weight individuals. RESULTS: Group 2 presented greater waist circumferences (p<0.05), especially when associated with excess weight. Additionally, group 2 had higher C-reactive protein and uric acid values than group 1 and the obese in group 2 had higher C-reactive protein and uric acid than the overweight and normal-weight individuals of the same group. On the other hand, homocysteine levels were similar in all individuals, regardless of weight. Body mass index correlated positively with both uric acid (r=0.39, p<0.01) and C-reactive protein (r=0.37, p<0.01). Waist circumference correlated only with uric acid (r=0.53, p<0.01). However, the correlation between body mass index and C-reactive protein was significant in group 2 (r=0.66, p<0.01) but not in group 1 (r=0.25, p>0.05). The same occurred regarding waist circumference and C-reactive protein, which correlated significantly only in the presence of impaired fasting glucose (r=0.40, p<0.05). In logistic regression, waist circumference was the independent variable (11%, p<0.01) of impaired fasting glucose. CONCLUSION: Pro-oxidative and pro-inflammatory states were significantly associated with impaired fasting glucose in the presence of body fat.
Diabetes mellitus; Oxidative stress; Inflammation; Obesity
