Skip to main content
Submitted by PatientsEngage on 27 December 2016

You have the Complete Blood Test in front of you and don’t now what the results mean. Dr. Shital Raval explains it in simple terms in our Health by Numbers/Medical Tests series.

A CBC or complete blood test is a basic blood test which is often carried out along with a physical examination to verify and analyse various cellular components in the blood. This allows the doctor to check and confirm any suspicions and find any potential health problems.

CBC test result alone may not be sufficient to diagnose certain or all health problems but is the first step in screening and early diagnosis. Since results from different laboratories may vary slightly, these values are not absolute. It would be best to discuss any abnormality in your blood test with your doctor.

Irregularities in the blood test may also be due to factors such as diet, obesity, physical activity, alcohol intake, menstrual cycle, certain medications etc.

Here is a brief explanation of the important blood panels to look out for in your CBC and what they mean:

RBC count: The number of RBCs in the blood may indicate their lifespan and general health. However any irregularities would need further testing and investigation.

WBC count: Since white blood cells are the important part of our immune system and help fight infection, a high count would indicate presence of an infection, inflammation, anaemia, autoimmune diseases or even leukaemia. A low count could be caused by certain medications or health problems.

Normal range of WBC differential count:

Neutrophils 40% to 60% of the total
Lymphocytes 20% to 40%
Monocytes 2% to 8%
Eosinophils  1% to 4%
Basophils 0.5% to 1%

Platelet count: Platelets are cells that are involved in clotting of blood. A low platelet count or thrombocytopenia may indicate a higher risk of bleeding as not enough platelets are being produced or are getting destroyed. Common causes for this include infections like Malaria or Dengue, cancer treatments such as chemotherapy or radiation, certain medications, autoimmune disorders which attack the platelets. A high platelet count called Thrombocytosis means there is an over-production of platelet cells. This may be due to Haemolytic anaemia, iron-deficiency anaemia, cancer, certain medications, bone marrow diseases, thrombocythemia (excess platelet production from bone marrow), recent surgery such as spleen removal, certain infections or allergic reactions. Formation of blood clots is a serious side-effect of high plate count too!

Haemoglobin: Red blood cells contain haemoglobin which is responsible for delivering oxygen from the lungs to the rest of the body and carbon dioxide back to the lungs. A low count may be a sign of anaemia. Normal range does vary in both genders.

Hematocrit: Hematocrit helps identify anaemia as it is a measure of the total volume of RBCs in blood. Normal range does vary in both genders.

Cholesterol: Cholesterol is the fatty substance or lipid made by cells in the body, especially by the liver. When low-density lipoproteins (LDLs) carry the cholesterol in the blood, it is called “bad cholesterol”. High levels of LDL indicate a higher risk of heart disease. When cholesterol is carried by High density lipoproteins (HDLs), it is referred to as “good cholesterol” and high levels of HDL may help prevent cardiovascular disease. Its also important to look at the cholesterol ratio : Total cholesterol divided by HDL. According to American Heart Association, it is important to keep it under 5 with 3.5 being ideal. 

Test Normal Range
Red blood cell (varies with altitude) Male: 5 to 6 million cells/mcL
Female: 4 to 5 million cells/mcL
White blood cell 4,500 to 10,000 cells/mcL
Platelets 140,000 to 450,000 cells/mcL
Haemoglobin (varies with altitude) Male: 14 to 17 gm/dL
Female: 12 to 15 gm/dL
Hematocrit (varies with altitude) Male: 41% to 50%
Female: 36% to 44%
Total cholesterol 200 to 240mg/dl
LDL 100 to 190 mg/dl
HDL 40 to 60 mg/dl
   
Changed
22/May/2017

Stories

  • Amit, a survivor of AML with his wife and young son in an outdoor setting and the text overlay Surviving AML was my second chance at life
    Surviving AML Was My Second Chance At Life
    A root canal that would not stop bleeding, led to a diagnosis of Acute Myeloid Leukemia (AML). Amit Arvind Shenoy narrates his experience of navigating treatment of AML, the long term side effects and why he chose to be a patient advocate. The initial symptoms My story begins with me biting into a peach one morning in the month of May in 2018. I was hungry after coming home from a long session of hospital audits which I performed on behalf of the Organ Donation NGO I worked for namely MOHAN…
  • Thumbnail with the text What books do children and their parents read during a difficult illness World Book Day. Graphic image of a boy and a girl sitting on top of books and reading
    Books That Comforted Our Child And Us
    For World Book Day, we asked parents of children with difficult illnesses if they found reading to their children helpful or if they themselves found solace in books. Suchismita Halder, mother of Ethan who has a rare condition Alagille Syndrome and Congenital Heart Disease 1. Any book that you read out to your child during a treatment or difficult phase which was both entertainment and comfort for both of you? Ethan is not very consistent when it comes to books—he goes through phases. When he…
  • Stock pic of a Cardiac Pacemaker with text overlay on blue strip Cardiac Pacemaker FAQ
    Cardiac Pacemaker - Frequently Asked Questions
    More than 1 million permanent pacemakers (PPMs) are implanted worldwide annually. Around 100,000 devices are implanted annually in Germany, and only over 20,000 in India. PatientsEngage team answers the frequently asked questions on Pacemakers so people can make informed decisions. What is a pacemaker? A pacemaker is a small device used to correct our heart rate when it is slower than the normal heart rate (known as bradycardia). It is implanted through a surgery in the chest or abdomen from…
  • A little child flanked by her parents and the text overlay Our Daughter Had CHD. We did not give up
    We Did Not Give Up In The Congenital Heart Disease Journey
    When Pritisudha’s daughter Rudranshi was born with CHD (Congenital Heart Disease), a condition with the heart’s structure which is present at birth and which can affect the normal flow of blood through the heart, her world naturally crumbled. Two successful surgeries later, 3-year-old Rudranshi is now fully recovered. She shares her journey. At what age was your daughter diagnosed with CHD? What were the symptoms? My daughter Rudranshi, born on 2nd January 2023, seemed a perfectly healthy baby…
  • Pic of a young boy flanked by his parents in front of a camel in a desert. Text overlay Or son had his first major heart surgery at 8 months
    My Son Had His First Major Heart Surgery At 8 Months
    Vibha Dhoot, 39 from Jaipur shares the journey of her son who was born with major and multiple congenital heart defects and how the family overcame the many challenges, worked through multiple surgeries and complicated treatment protocols to give him a promising future. Please tell us about your child’s conditions and how and when this was diagnosed. At what age? How did it all start? The early symptoms. My son was born in 2016 after a full-term pregnancy. He is 9 years old now. All routine…
  • Stock pic of a young woman fainting and the text overlay When to take fainting seriously
    When Should You Take Fainting Seriously
    Unconsciousness or fainting is an occurrence that we are all familiar with. It is usually a symptom of an underlying medical issue. Here the PatientsEngage team helps you understand the many causes of fainting and when to see a doctor. Unconsciousness is like a switch turning off, and most people know this as something far more familiar called fainting. When someone faints, the brain temporarily receives less blood than it needs, leading to a brief loss of awareness to their surroundings.…
  • Stock pic of a man speaking to a doctor and the text overlay किसी भी सर्जरी से पहले डॉक्टर से क्या पूछें
    किसी भी सर्जरी से पहले डॉक्टर से क्या पूछें - 2
    सर्जरी की आवश्यकता वाली किसी स्थिति का निदान होना हममें से अधिकांश लोगों के लिए कठिन और भ्रमित करने वाली स्थिति हो सकती है। हम चाहते हैं कि सर्जरी सही समय पर, और सही प्रक्रिया से हो, पर अक्सर हमें घबराहट होती है और लगता है कि हमें जल्दबाजी में निर्णय लेना पड़ रहा है। हमें आवश्यक जानकारी की कमी महसूस होती है। इस लेख में हम 5 आम सर्जरी से संबंधित कुछ सवालों पर चर्चा कर रहे हैं, ताकि आपको कुछ जानकारी मिले और आप अपने डॉक्टर से अपनी स्थिति के अनुसार प्रश्न पूछ सकें, और आप सर्जरी संबंधित निर्णय के…
  • Stock pic of a person speaking to a doctor and the text overlay on green strip किसी भी सर्जरी से पहले डॉक्टर से क्या पूछें
    किसी भी सर्जरी से पहले डॉक्टर से क्या पूछें - भाग 1
    सर्जरी की आवश्यकता वाली किसी स्थिति का निदान होना हममें से अधिकांश लोगों को ऐसी स्थिति का पता चलना कठिन और अस्पष्ट लग सकता है।। हम चाहते हैं कि सर्जरी सही समय पर, और सही प्रक्रिया से हो, पर अक्सर हमें घबराहट होती है और लगता है कि हमें जल्दबाजी में निर्णय लेना पड़ रहा है। हमें आवश्यक जानकारी की कमी महसूस होती है। इस लेख में हम सर्जरी से संबंधित कुछ सवालों पर चर्चा कर रहे हैं, ताकि आपको कुछ जानकारी मिले और आप अपने डॉक्टर से अपनी स्थिति के अनुसार प्रश्न पूछ सकें, और आप सर्जरी संबंधित निर्णय के बारे…
  • Pic of Dr Hari Menon Hematologist and Aparna Mittal and the title Unpacking CAR-T Cell Therapy Decision
    Unpacking the CAR-T Cell Therapy Decision for Blood Cancers
    In the UNPACKING podcast series, we start with a discussion on a new and exciting innovation in cancer treatment, the CAR -T Cell Therapy with Dr. Hari Menon. During the course of this conversation, we will unpack what CAR -T is, where it stands today. Is it really what you think it is and how we can take informed decisions on this new treatment? Dr. Hari Menon is Professor of Hematology and Head Medical Oncology at St. John's National Academy of Health Sciences in Bangalore. He has been in the…
  • Stock pic of a woman speaking to a doctor and the text overlay Questions to ask your doctor before a surgery
    Questions to Ask Before a Surgery – Part 2
    When one is told that they need surgery it may feel daunting and very radical to most of us. The aim is to get the surgery done on time with the best outcome and that weighs on the decision as we feel pressed for time. Here are some queries related to the 5 surgical conditions that you may ask your doctor to feel more confident about your decision and to help feel a part of the decision of going ahead with the surgery. This is the second part of the article Questions to Ask Before Any Surgery…