Introduction:

There are several techniques to evaluate body composition, among them DEXA stands out, but presents a high cost. On the other hand, body mass index (BMI) is the most used method. However, it has limitations.

Objective:

To verify the applicability of a new BMI equation and to associate it with dual energy X‐ray absorptiometry (DXA) in adolescents with DM1.

Methods:

This research of intentional characteristics was composed of 30 adolescents (15 boys and 15 girls), aged between 10 and 15 years. Stature and body mass were evaluated to obtain BMI2.5and BMI2. The percentage of fat (%BF) was obtained through DXA. The glycated hemoglobin (HbA1c) was verified by mean soft he TurbiClin immunoturbidimetric test. Descriptive statistics (mean, standard deviation and percentage of frequency) were used to analyze the data. The correlation between the variables (BMI, DXA and HbA1c) was evaluated by the Pearson correlation coefficient. We adopted a significance level of p < 0.05.

Results:

The new equation of BMI2.5 was associated with BMI2.5 Z score (r= 0.68, p= 0.001), BMI2 (r= 0.99, p= 0.001), BMI2 Z score (r= 0.67, p= 0.001) and DEXA (r= 0.58, p= 0.05). Meanwhile, BMI2.5 Z score showed a positive association with BMI2 (r= 0.70, p= 0.001) and BMI2 Z score (r= 1.0, p= 0.001).

Conclusion:

We can highlight that for adolescents with DM1, the equation used to estimate the nutritional status is the same, since the imprecision of both BMI remains the same to determine %G. The same occurs when transformed into BMI2.5 Z score, the level of correlation continues similar.

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