Diabetes Risk: Interpreting Your Blood Test Results - Internal Medicine

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What is the likelihood of developing diabetes?


Hello Doctor, Happy New Year! I would like to ask about my fasting blood test results after 12 hours: Mean Corpuscular Volume (MCV) 78.5, Hemoglobin 24.6, High-Sensitivity C-Reactive Protein (hs-CRP) 10.58, Glycated Hemoglobin (HbA1c) 7.7, Aspartate Aminotransferase (AST) 86, Alanine Aminotransferase (ALT) 172, Alkaline Phosphatase 110, Total Iron Binding Capacity (TIBC) 540, High-Density Lipoprotein Cholesterol (HDL-C) 35, Low-Density Lipoprotein Cholesterol (LDL-C) 139, Insulin 19.8, C-Peptide Insulin 4.80.
Are any of these values too high or too low, indicating diabetes? Currently, I have no related symptoms, my weight has not changed, I do not experience frequent urination, and I do not have increased appetite or thirst, but I am using biologics.
Thank you for your answers, and I appreciate your hard work.

D, 20~29 year old female. Ask Date: 2015/12/31

Dr. Xiao Yongxun reply Internal Medicine


1.
Your fasting blood test report shows an average red blood cell volume of 78.5, hemoglobin of 24.6, high-sensitivity C-reactive protein of 10.58, glycated hemoglobin (HbA1c) of 7.7, GOT (AST) of 86, GPT (ALT) of 172, alkaline phosphatase of 110, total iron binding capacity of 540, high-density lipoprotein cholesterol (HDL-C) of 35, non-high-density lipoprotein cholesterol (non-HDL-C) of 139, insulin of 19.8, and C-peptide insulin of 4.80.
During formal discussions, it is important to include units to avoid misunderstandings.
Additionally, with numerous test items, the clinical purpose is to assist in diagnosing specific diseases.
Tests, imaging studies, and various assays are fundamentally used to confirm clinical diagnoses; one should not reverse this process by conducting many tests and then speculating on possible diagnoses.
2.
To determine whether the above values are elevated or decreased, it is best to refer to the reference values provided by the specific laboratory, as testing methods or laboratories may differ.
This is particularly true for commonly used clinical tests.
Note: a.
GOT (AST) of 86 and GPT (ALT) of 172 may be elevated, indicating possible hepatitis, with common causes including hepatitis B, hepatitis C, alcoholic liver disease, fatty liver, drug-induced hepatitis, gallstones, etc.
b.
The high-sensitivity C-reactive protein level may be elevated, indicating a significant inflammatory response in the body, commonly due to infections, inflammatory responses related to atherosclerosis, etc.
c.
The high-density lipoprotein cholesterol level may be low, commonly due to lack of exercise, excessive intake of high-sugar and high-fat foods or beverages, etc.
d.
The non-high-density lipoprotein cholesterol level likely refers to low-density lipoprotein cholesterol (LDL), which may be elevated, commonly due to excessive intake of trans fats, high-cholesterol foods, lack of exercise, etc.
e.
Insulin or C-peptide insulin levels appear acceptable, but it is advisable to compare them with the laboratory's reference values.
f.
The assessment of red blood cell values must be considered holistically; one cannot make a judgment based solely on two values (average red blood cell volume and hemoglobin).
3.
According to the American Diabetes Association's diagnostic criteria for diabetes: a.
Fasting plasma glucose ≥126 mg/dL after 8 hours or more, b.
Oral glucose tolerance test 2-hour plasma glucose ≥200 mg/dL, c.
HbA1c ≥6.5% (must not have any disproportionate hyperglycemia and the testing method must meet international certification standards NGSP and DCCT), and the above a, b, c conditions must be confirmed on two separate occasions.
d.
If there are clinical symptoms of diabetes (such as polydipsia, polyuria, polyphagia, weight loss, etc.), any plasma glucose level ≥200 mg/dL is sufficient (this condition only needs to be met once).
4.
Therefore, you currently do not have related symptoms, your weight has not changed, and you do not experience increased urination or increased eating or drinking.
The only test result indicating HbA1c is 7.7%, and there is a lack of blood glucose values.
Thus, it can only be said that you are very likely to have diabetes.
On the other hand, you mentioned using a biologic agent; what specific biologic agent is it? Why are you using it? What are its components? How long have you been using it? Whether it could interfere with diabetes diagnosis remains to be discussed.
5.
Please discuss your test results in detail with the physician who ordered them or your family doctor before making any decisions.

Reply Date: 2015/12/31

More Info


Based on the blood test results you provided, there are several key indicators that can help assess your risk for diabetes and other health conditions. Let's break down the results and their implications.

1. Glycated Hemoglobin (HbA1c): Your HbA1c level is 7.7%. According to the American Diabetes Association, an HbA1c of 6.5% or higher indicates diabetes, while levels between 5.7% and 6.4% suggest prediabetes. Therefore, your HbA1c level suggests that you may have diabetes. It is important to note that this test reflects your average blood glucose levels over the past two to three months.

2. Fasting Insulin Levels: Your fasting insulin level is 19.8 µU/mL, which is considered elevated. Normal fasting insulin levels typically range from 2 to 25 µU/mL, but higher levels can indicate insulin resistance, a common precursor to type 2 diabetes. The presence of elevated insulin levels alongside a high HbA1c suggests that your body may be struggling to manage blood sugar effectively.

3. High-Sensitivity C-Reactive Protein (hs-CRP): Your hs-CRP level is 10.58 mg/L, which is significantly elevated. This protein is a marker of inflammation in the body, and high levels can indicate chronic inflammation, which is associated with various health issues, including cardiovascular disease and metabolic syndrome. Chronic inflammation can also contribute to insulin resistance.

4. Lipid Profile: Your high-density lipoprotein (HDL) cholesterol is 35 mg/dL, which is considered low. Low HDL levels are a risk factor for heart disease. Conversely, your non-high-density lipoprotein (non-HDL) cholesterol is 139 mg/dL, which is elevated and suggests an increased risk for cardiovascular issues. Managing cholesterol levels is crucial, especially for individuals with diabetes.

5. Liver Enzymes: Your liver enzymes (GOT and GPT) are elevated at 86 and 172, respectively. Elevated liver enzymes can indicate liver inflammation or damage, which can be caused by various factors, including fatty liver disease, alcohol consumption, or medication effects. This is particularly concerning in the context of diabetes, as individuals with diabetes are at higher risk for liver disease.

6. Red Blood Cell Indices: Your mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) levels suggest potential anemia, which can be caused by various factors, including nutritional deficiencies or chronic disease. Anemia can complicate the management of diabetes and overall health.

Given these results, it is essential to consult with your healthcare provider for a comprehensive evaluation. They may recommend further testing, including a repeat HbA1c test, fasting glucose levels, and possibly an oral glucose tolerance test to confirm the diagnosis of diabetes. Additionally, lifestyle modifications such as dietary changes, increased physical activity, and possibly medication may be necessary to manage your blood sugar levels and overall health.

In summary, your blood test results indicate a significant risk for diabetes, particularly due to the elevated HbA1c and insulin levels, along with other concerning markers. It is crucial to address these issues promptly with your healthcare provider to develop an appropriate management plan.

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