Purpose:
This study aimed to determine the relationship of abdominal diameter consist of Sagital Abdominal Diameter (SAD), Ratio SAD/Height and Abdominal Diameter Index (ADI) with insulin resistance in obese female adolescents.

Method:
This study was conducted in June-August 2019 at Universitas Diponegoro, Central Java. this study used cross sectional design with a total of 120 female students aged 17-21 years and selected using purposive sampling method. Study variables included SAD, SAD/Height, ADI and insulin resistance level. SAD was measured by abdominal caliper, SAD/Height was ratio of SAD divided by height. ADI was ratio of SAD divided by thigh circumference. The value of insulin resistance was obtained from the calculation of homeostasis model assessment insulin resistance (HOMA-IR). Data normality was analyzed by Kolmogorov-smirnov test, all data were not normal distribution so the bivariate test analyzed by Rank spearman test.

Results:
As many as 42.5% subjects had SAD which included at risk and 83.3% subjects had suffering insulin resistance. There was significant relationship between SAD, SAD/Height, ADI with insulin resistance (SAD (p=0.001), SAD/Height (p<0.001) and ADI (p=0.003). In addition, SAD, SAD/Height, ADI were significant relationship with fasting blood glucose (SAD (p=0.048), SAD/Height (p=0.022) and ADI (p=0.003).

Conclusion:
There were significant relationship between SAD, SAD/Height, ADI with insulin resistance and fasting blood glucose in obese adolescent female.