UNDERSTANDING YOUR LAB RESULTS: WHAT THE NUMBERS ACTUALLY MEAN
UNDERSTANDING YOUR LAB RESULTS: What the Numbers Actually Mean
By Omokos Diagnostics and Clinical Services Ltd | Benin City, Edo State
You just collected your laboratory results. The paper is full of numbers, abbreviations, and ranges. Some numbers have a red flag beside them. Others say HIGH or LOW. And suddenly you feel more confused — and more worried — than before you did the test.
You are not alone. This is one of the most common experiences our patients at Omokos Diagnostics share with us. So we decided to write this guide — in plain, simple language — to help every Nigerian patient understand exactly what their lab results are telling them.
Important Notice: This guide is for general education only. Always discuss your specific results with a qualified doctor or healthcare provider. Never self-medicate based on lab results alone.
1. How to Read a Lab Result Sheet
Every laboratory result sheet follows a similar structure. Here is what each column means:
| Column | What It Means |
| Test Name | The specific test that was performed |
| Your Result | The actual value found in your blood, urine, or sample |
| Reference Range / Normal Range | The range considered normal for healthy adults |
| Unit | The measurement unit used (e.g., g/dL, mmol/L, %) |
| Flag (H or L) | H means your result is Higher than normal; L means Lower than normal |
A result outside the normal range does not always mean something is seriously wrong. Age, gender, pregnancy, time of day, and even recent meals can affect results. Context matters.
2. Full Blood Count (FBC) — The Most Common Test
The Full Blood Count, also called Complete Blood Count (CBC), is the most commonly requested test. It examines the different cells in your blood.
Red Blood Cells (RBC) and Haemoglobin (Hb)
Haemoglobin is the protein in red blood cells that carries oxygen around your body.
| Parameter | Normal Range | Low Means | High Means |
| Haemoglobin (Hb) | Men: 13.5–17.5 g/dL Women: 12.0–15.5 g/dL | Anaemia — possibly due to iron deficiency, blood loss, or chronic disease | Possible dehydration or blood disorder |
| Packed Cell Volume (PCV/HCT) | Men: 41–53% Women: 36–46% | Anaemia — confirms low haemoglobin finding | Dehydration or polycythaemia |
| Red Blood Cell Count (RBC) | Men: 4.5–5.9 million/uL Women: 4.1–5.1 million/uL | Anaemia or nutritional deficiency | Dehydration or bone marrow disorder |
| MCV (Mean Cell Volume) | 80–100 fL | Iron deficiency or thalassaemia | Vitamin B12 or folate deficiency |
Anaemia is very common in Nigeria, especially in women of childbearing age, children, and people with malaria history. Low haemoglobin should never be ignored.
White Blood Cells (WBC) — Your Immune Army
White blood cells fight infections and disease. The total WBC count tells you how active your immune system is.
| Parameter | Normal Range | Low Means | High Means |
| Total WBC | 4,000–11,000 cells/uL | Weak immune system, viral infection, or bone marrow problem | Active infection, inflammation, or leukaemia (if very high) |
| Neutrophils | 40–70% | Increased risk of bacterial infection | Bacterial infection or stress response |
| Lymphocytes | 20–40% | Possible HIV, viral illness, or immune problem | Viral infection like Hepatitis b,c, EBV, or COVID |
| Eosinophils | 1–4% | Rarely significant | Parasitic infection or allergic reaction — common in Nigeria |
Platelets — Your Blood Clotting Cells
| Parameter | Normal Range | Low Means | High Means |
| Platelet Count | 150,000–400,000 /uL | Risk of bleeding — often seen in malaria, dengue, or typhoid | Risk of clotting — can occur in infection or inflammation |
Low platelets (thrombocytopenia) during a fever in Nigeria should immediately raise suspicion for malaria. Get a malaria test done alongside your FBC.
3. Malaria Parasite (MP) Test
The malaria test checks whether the malaria parasite is present in your blood. There are two main types:
| Test Type | What It Does | Result Meaning |
| Malaria RDT (Rapid Test) | Detects malaria antigen quickly — result in 15 minutes | Positive = malaria parasites detected; Negative = not detected at this time |
| Malaria Microscopy (MP) | Examines blood under microscope — more detailed | Reports species (P. falciparum most common in Nigeria) and parasite density (+, ++, +++, ++++) |
- + (1 plus) = mild infection
- ++ (2 plus) = moderate infection
- +++ (3 plus) = heavy infection
- ++++ (4 plus) = very heavy infection — urgent treatment needed
A negative malaria test does not completely rule out malaria. If symptoms persist, repeat the test after 24 hours or request a thick film examination.
4. Liver Function Tests (LFTs)
Liver function tests check how well your liver is working. The liver processes everything you eat, drink, and take as medication.
| Test | Normal Range | What Abnormal Results May Indicate |
| ALT (Alanine Aminotransferase) | 7–56 U/L | High ALT = liver damage, hepatitis, or medication side effects |
| AST (Aspartate Aminotransferase) | 10–40 U/L | High AST = liver disease, heart muscle damage, or heavy alcohol use |
| ALP (Alkaline Phosphatase) | 44–147 U/L | High ALP = bile duct blockage, bone disease, or liver disease |
| Total Bilirubin | 0.1–1.2 mg/dL | High bilirubin = jaundice — yellow skin and eyes |
| Total Protein | 6.0–8.3 g/dL | Low = malnutrition or liver disease; High = dehydration or infection |
| Albumin | 3.5–5.0 g/dL | Low albumin = liver disease, malnutrition, or kidney disease |
Nigerians with hepatitis B or C often have no symptoms for years. Regular liver function tests are important — especially if you have not checked your hepatitis status.
5. Kidney Function Tests (KFTs)
These tests check how well your kidneys are filtering waste from your blood. The kidneys are silent organs — they can lose up to 50% of their function before you feel any symptoms.
| Test | Normal Range | What High Results May Indicate |
| Creatinine | Men: 0.7–1.3 mg/dL Women: 0.6–1.1 mg/dL | Kidney damage, dehydration, or excessive muscle breakdown |
| Urea (BUN) | 7–20 mg/dL | Kidney disease, high protein diet, dehydration, or internal bleeding |
| Uric Acid | Men: 3.4–7.0 mg/dL Women: 2.4–6.0 mg/dL | Gout, kidney disease, or excessive red meat consumption |
| eGFR (Estimated GFR) | Above 60 mL/min | Below 60 indicates reduced kidney function — monitor closely |
Hypertension and diabetes are the two biggest causes of kidney disease in Nigeria. If you have either condition, check your kidney function at least twice a year.
6. Blood Sugar (Glucose) Tests
Blood sugar tests are used to screen for and monitor diabetes. There are different types depending on when the sample is collected.
| Test | Normal | Pre-Diabetes | Diabetes |
| Fasting Blood Sugar (FBS) | Below 5.6 mmol/L (100 mg/dL) | 5.6–6.9 mmol/L (100–125 mg/dL) | 7.0 mmol/L or above (126 mg/dL+) |
| Random Blood Sugar (RBS) | Below 7.8 mmol/L (140 mg/dL) | 7.8–11.0 mmol/L | Above 11.1 mmol/L (200 mg/dL+) |
| HbA1c (3-month average) | Below 5.7% | 5.7–6.4% | 6.5% and above |
- Fasting Blood Sugar = taken after at least 8 hours of not eating
- Random Blood Sugar = taken at any time of day
- HbA1c = the best test for long-term diabetes monitoring
Diabetes is increasingly common in Nigeria, including in young people. If your fasting sugar is above 5.6 mmol/L, do not ignore it. Early action can prevent serious complications.
7. Lipid Profile — Cholesterol and Heart Health
The lipid profile measures the fats in your blood. High cholesterol increases your risk of heart attack and stroke.
| Test | Desirable Level | Borderline | High Risk |
| Total Cholesterol | Below 5.2 mmol/L | 5.2–6.2 mmol/L | Above 6.2 mmol/L |
| LDL (Bad Cholesterol) | Below 2.6 mmol/L | 2.6–4.1 mmol/L | Above 4.1 mmol/L |
| HDL (Good Cholesterol) | Above 1.0 mmol/L (Men) Above 1.3 mmol/L (Women) | 0.9–1.0 mmol/L | Below 0.9 mmol/L |
| Triglycerides | Below 1.7 mmol/L | 1.7–2.3 mmol/L | Above 2.3 mmol/L |
LDL is the dangerous cholesterol — it builds up in your arteries. HDL is the protective cholesterol — it clears the arteries. You want LDL LOW and HDL HIGH.
8. Thyroid Function Tests
The thyroid is a small gland in your neck that controls your body’s metabolism, energy, and weight.
| Test | Normal Range | Low Result Means | High Result Means |
| TSH (Thyroid Stimulating Hormone) | 0.4–4.0 mIU/L | Overactive thyroid (hyperthyroidism) — weight loss, fast heartbeat, anxiety | Underactive thyroid (hypothyroidism) — weight gain, fatigue, feeling cold |
| T4 (Thyroxine) | 58–161 nmol/L | Underactive thyroid | Overactive thyroid |
| T3 (Triiodothyronine) | 1.2–2.7 nmol/L | Underactive thyroid | Overactive thyroid |
Thyroid problems are more common in women and are often mistaken for stress or depression. Unexplained weight gain or loss, persistent fatigue, or hair loss are reasons to check your thyroid.
9. Urinalysis — Urine Test
A urine test checks the health of your kidneys, bladder, and urinary tract. It can also reveal diabetes and infections.
| Parameter | Normal Result | Abnormal Result Means |
| Colour | Pale yellow to amber | Dark yellow = dehydration; Red/brown = blood in urine |
| Protein | Negative / Trace | Positive protein = kidney damage or infection |
| Glucose | Negative | Positive glucose = possible diabetes |
| Blood (RBC) | Negative | Positive = kidney stones, infection, or kidney disease |
| White Blood Cells (WBC) | 0–5 per high power field | High WBC = urinary tract infection (UTI) |
| Nitrite | Negative | Positive = bacterial infection present |
| Ketones | Negative | Positive = starvation, diabetes, or very low carbohydrate diet |
| pH | 4.5–8.0 | Very acidic or very alkaline can indicate kidney or metabolic issues |
10. Common Questions Patients Ask
My result says HIGH — should I panic?
Not immediately. A single result outside normal range does not confirm disease. Your doctor will look at your symptoms, your history, and may request repeat tests before making any diagnosis. Stay calm and consult your doctor.
Why are my results different from last time?
Many factors affect results — time of day, whether you fasted, recent exercise, stress, medications, and even the laboratory equipment used. Small variations between results are normal. Major changes over time are what doctors watch for.
Can I interpret my own results?
You can use guides like this one to understand what the tests measure. But interpreting results in the context of your health, your symptoms, and your history requires a trained clinician. This guide helps you understand — not diagnose.
How often should I do routine blood tests?
- Healthy adults under 40 — once a year
- Adults with diabetes, hypertension, or chronic illness — every 3 to 6 months
- Pregnant women — as scheduled by your doctor throughout pregnancy
- Children — when recommended by a paediatrician based on symptoms
What should I bring when collecting results?
- Your test request form from your doctor
- Your previous results if available — for comparison
- A list of any medications you are currently taking
- Questions you want to ask — write them down before you come
Knowledge is the First Step to Better Health.
At Omokos Diagnostics and Clinical Services Ltd, we do not just give you numbers.
We give you understanding, accuracy, and care — every single time.
Visit Us:
Omokos Diagnostics and Clinical Services Ltd
Ekehuan Barracks, Benin City, Edo State, Nigeria
Your Health, Our Commitment
