Abstract
This study aimed to evaluate the efficacy of SHBG in predicting insulin resistance (IR) in newly diagnosed, untreated patients with polycystic ovary syndrome (PCOS). Hundred newly diagnosed, untreated patients with PCOS and 61 subjects without PCOS (41 healthy volunteers with normal BMI and 20 subjects with overweight/obese) were included in the study. Receiver-operating characteristic (ROC) analysis was used to assess the effectiveness of SHBG in predicting IR in overweight/obese and non-overweight PCOS patients and the optimal cut-off values of SHBG. The results showed negative correlations between log-SHBG and log-I0 (r = − 0.372, P < 0.001) and log-SHBG and log-Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) (r = − 0.393, P < 0.001) after adjusting for blood pressure, serum lipid, age, and body mass index (BMI) in all of the PCOS patients. In patients with IR (defined as HOMA-IR ≥2.29), the area under the ROC curves (AUCs) of the SHBG for ROC analysis in the non-overweight group, overweight/obese group, and all PCOS patients were 0.774 (P = 0.0001), 0.922 (P = 0.0001), and 0.885 (P = 0.0001), respectively. The optimal cut-off value of SHBG was 37 nmol/L with a sensitivity of 97.62% and specificity of 80.85% in the overweight group. In patients with IR (HOMA-IR ≥2.5), the AUCs of SHBG for ROC analysis in the non-overweight group, overweight/obese group, and all PCOS patients were 0.741 (P = 0.0003), 0.928 (P = 0.0001), and 0.880 (P = 0.0001), respectively. The optimal cut-off value of SHBG was 30.2 nmol/L with a sensitivity of 97.44% and specificity of 82.69% in the overweight/obese group. In conclusion, this study observed a negative correlation between SHBG and HOMA-IR in PCOS patients after adjustment of confounding factors. SHBG was an independent influential factor of HOMA-IR and can be used as a positive predictive marker for IR in PCOS patients, especially in those who are overweight/obese.
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The data used to support the findings of the current study are available from the corresponding author on request.
Abbreviations
- AUC:
-
area under curve
- BMI:
-
body mass index
- CVs:
-
coefficients of variability
- DBP:
-
diastolic blood pressure
- E2 :
-
estrogen
- FSH:
-
follicle-stimulating hormone
- G0 :
-
glucose level at fasting status
- G60 :
-
glucose level after 60 min
- G120 :
-
glucose level after 120 min
- HDL-C:
-
high-density lipoprotein cholesterol
- HOMA-IR:
-
homeostasis model assessment for insulin resistance
- I0 :
-
insulin level at fasting status
- I60 :
-
insulin level after 60 min
- I120 :
-
insulin level after 120 min
- LDL-C:
-
low-density lipoprotein cholesterol
- LH:
-
luteinizing hormone
- OGTT:
-
oral glucose tolerance test
- PCOS:
-
polycystic ovary syndrome
- ROC:
-
receiver-operating characteristic
- SBP:
-
systolic blood pressure
- SHBG:
-
sex hormone–binding globulin
- TC:
-
total cholesterol
- TG:
-
triglycerides
- TT:
-
total testosterone
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Acknowledgements
The author would like to thank Editage for technical language editing of the manuscript.
Funding
This study was supported by grants from the National Natural Science Foundation of China (grant number: 81200619) and the Medical Scientific Research Foundation of Guangdong Province, China (grant number: A2020390).
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The study was approved by the Ethics Committee of the First Affiliated Hospital Shantou University Medical College according to the Council for International Organizations of Medical Sciences. Written informed consent was obtained from all participants.
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Chen, F., Liao, Y., Chen, M. et al. Evaluation of the Efficacy of Sex Hormone–Binding Globulin in Insulin Resistance Assessment Based on HOMA-IR in Patients with PCOS. Reprod. Sci. 28, 2504–2513 (2021). https://doi.org/10.1007/s43032-021-00535-0
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DOI: https://doi.org/10.1007/s43032-021-00535-0