You have a sheet of numbers and no idea which ones matter. Some have a reference range printed beside them, some do not, and one is flagged in a way that looks alarming without explaining anything.
This guide walks through each measurement on a standard biometric panel: what it is, what the reference ranges are according to the organizations that set them, and what a result outside that range actually means. Which, in most cases, is less dramatic than it first appears.
One thing to say at the outset. This article explains what the numbers represent. It cannot tell you what yours mean for you, because that depends on your age, your history, your family history, and factors no reference table accounts for. Every source cited below makes the same point: individual targets vary by personal risk. Use this to understand your sheet, then take it to a physician.
Key Insights
- A screening result is a flag, not a diagnosis: it identifies what is worth looking at properly, and nothing on the sheet is a conclusion.
- Reference ranges are population averages: MedlinePlus notes that cholesterol targets in particular shift with your personal risk, and a physician may set you a different goal.
- One reading is a single moment: blood pressure especially moves with posture, caffeine, cuff size, and the situation itself.
- Direction matters more than position: a number drifting across three annual screenings tells you more than any single year's figure.
- Several borderline numbers together outweigh one that is clearly high: blood pressure, glucose, lipids, and waist measurement are read as a cluster.
Three Rules Before You Read Anything
Out of range does not mean diseased. Reference ranges are built so that most healthy people fall inside them, which means a proportion of perfectly healthy people fall outside. A single flagged value is a reason to look further, not a verdict.
In range does not mean cleared. A normal panel today says nothing about next year, which is the whole argument for an annual cadence rather than a one-off.
Your sheet is not your whole health. A biometric panel measures cardiovascular and metabolic markers. It does not assess cancer risk, bone health, hearing, vision, or most of what a full physical covers, and it does not replace age-appropriate screening such as colonoscopy.
Your Blood Pressure Reading
Two numbers: systolic over diastolic. Systolic is the pressure when your heart contracts, diastolic the pressure between beats.
The American Heart Association categories:
- Normal: below 120 systolic and below 80 diastolic.
- Elevated: 120 to 129 systolic and below 80 diastolic.
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic.
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic.
- Severe hypertension: above 180 systolic and/or above 120 diastolic with no symptoms. Contact a healthcare professional.
- Hypertensive emergency: those same numbers with chest pain, shortness of breath, back pain, numbness, weakness, vision change, or difficulty speaking. Call 911.
Note the word "or" in the Stage 1 and Stage 2 definitions. Either number crossing the line places you in that category, so 126 over 84 is Stage 1 even though the top number looks fine.
This is also the measurement most likely to read high for reasons that have nothing to do with your health. Caffeine, nicotine, a brisk walk to the appointment, an unsupported arm, crossed legs, a cuff that is too small for your arm, talking during the measurement, and simply being measured all push the number up. If yours came back high, the correct next step is a repeat under better conditions, not a conclusion. More detail in our article on what blood pressure screening catches at work.
Your Cholesterol Numbers
A lipid panel gives you four figures. They are related but measure different things, and the relationship between them matters as much as any single value.
Total Cholesterol
MedlinePlus gives a desirable level of less than 200 mg/dL for adults aged 20 or older. For context on how common a higher figure is, the CDC reports about 86 million US adults aged 20 or older with total cholesterol above 200 mg/dL, and that between 2017 and 2020, 10 percent of adults were above 240 mg/dL.
Total cholesterol on its own is the least informative number on the panel, because it combines components that behave very differently. A high total driven by high HDL is a different situation from the same total driven by high LDL.
LDL Cholesterol
The one that contributes to arterial plaque. MedlinePlus gives these general ranges for healthy adults:
- Optimal: less than 100 mg/dL
- Near optimal or above optimal: 100 to 129 mg/dL
- Borderline high: 130 to 159 mg/dL
- High: 160 to 189 mg/dL
- Very high: 190 mg/dL and above
This is where personal risk changes the target substantially. MedlinePlus notes that for someone at high risk of a future heart attack or stroke, or who already has heart disease, the goal may be 70 mg/dL or below, and for very high risk, 55 mg/dL or below. An LDL of 105 is unremarkable for one person and a problem for another, which is exactly why the sheet cannot interpret itself.
HDL Cholesterol
The one where higher is better, because HDL helps carry cholesterol away from the arteries. MedlinePlus puts 60 mg/dL or greater as best for adults aged 20 or older. Low is below 40 mg/dL for men and below 50 mg/dL for women, a sex difference confirmed by the NHLBI.
If you read your HDL the same way as the rest of the panel, you will get it backwards. A low number here is the concerning one.
Triglycerides
A separate fat in the blood, closely tied to diet, alcohol, and metabolic health. MedlinePlus gives normal as below 150 mg/dL, borderline high as 150 to 199, high as 200 to 499, and very high as 500 mg/dL and above.
Triglycerides are the panel's most volatile number and the one most affected by what you ate recently. If your screening was non-fasting, a raised triglyceride figure is worth rechecking fasted before anyone draws conclusions from it. MedlinePlus also notes that 150 mg/dL or higher counts as a risk factor for metabolic syndrome.
A Note on Fasting
Guidance has relaxed. MedlinePlus notes you may need to fast 9 to 12 hours before a cholesterol test, while the American Heart Association says the test may be fasting or non-fasting depending on your situation. If you did not fast and your lipids came back elevated, mention that to whoever reviews your results.
Your Blood Sugar
Your sheet will show either a glucose reading, an A1C, or both. Glucose is a snapshot of this moment. A1C reflects average blood sugar over roughly the previous three months, which makes it the more informative of the two.
The American Diabetes Association thresholds:
- A1C: normal below 5.7 percent, prediabetes 5.7 to 6.4 percent, diabetes 6.5 percent or higher.
- Fasting blood glucose: normal below 100 mg/dL, prediabetes 100 to 125 mg/dL, diabetes 126 mg/dL or higher.
- Two-hour glucose tolerance test: normal below 140 mg/dL, prediabetes 140 to 199 mg/dL, diabetes 200 mg/dL or higher.
The prediabetes band is the one worth paying attention to, and it is where a screening earns its place. The CDC reports 115.2 million US adults with prediabetes, more than 2 in 5 adults, and 8 in 10 of them unaware. An A1C of 6.0 is not a diagnosis of anything. It is information arriving while there is still a great deal of room to act on it.
One caution. A single reading in the diabetes range does not by itself establish a diagnosis. Confirmation normally requires a repeat test, and that is a conversation with a physician rather than something a screening sheet settles.
Your Body Measurements
Height, weight, BMI, and usually waist circumference.
BMI is a blunt instrument. It is a ratio of weight to height and knows nothing about body composition, which is why it misclassifies muscular people routinely. Treat it as one input among several rather than a verdict.
Waist circumference is often the more useful of the two, because abdominal measurement tracks more closely with metabolic risk. The NHLBI gives more than 40 inches for men and more than 35 inches for women as the threshold used in assessing metabolic syndrome. That same page notes explicitly that a provider may use different values depending on race and ethnicity, which is a genuine limitation of applying one number to everybody.
When Several Numbers Move Together
This is the part a line-by-line reading of your sheet misses entirely.
Clinicians look at blood pressure, blood sugar, triglycerides, HDL, and waist measurement as a group, because that particular combination carries more weight together than separately. The NHLBI lists the components used in assessing metabolic syndrome, including blood pressure consistently at 130/85 mmHg or higher, triglycerides consistently above 150 mg/dL, HDL below 40 for men or below 50 for women, and the waist thresholds above.
Practically, this means a sheet with four borderline numbers may warrant more attention than a sheet with one clearly high number and everything else normal. If several of your values sit just outside their ranges, that pattern is worth raising specifically rather than mentioning each number in isolation.
What to Do With an Out-of-Range Result
Do not act on it alone. Not with a supplement, not with a drastic dietary change, and not by ignoring it. A flagged result is information for a clinical conversation.
Book an appointment and bring the sheet. Bring your medication list too, because several common medications change how these numbers should be read.
Ask about confirmation. For most markers the next step is a repeat test under controlled conditions rather than immediate treatment.
Ask what your personal target is. This is the most useful question available to you, and the one that turns a population reference range into something that applies to you specifically.
Keep the sheet. Next year's screening is far more informative when you can put the two side by side. Direction of travel beats a single position every time.
What Your Results Do Not Tell You
A biometric panel is narrow by design. It is not a cancer screen. It does not assess heart structure or function, which needs imaging such as the echocardiography covered in our article on what a heart ultrasound reveals. It does not measure cardiorespiratory fitness, which is a separate assessment explained in our piece on what VO2 max is. And it does not substitute for age-appropriate screening.
Knowing the boundary is part of reading the sheet correctly. A clean biometric panel is good news about a specific set of markers, and only those.
How NDS Wellness Explains Results
Our view is that handing someone a printout is the weakest part of most screening programs, which is why we do not do it that way.
NDS Wellness delivers physician-led on-site biometric screening from a mobile wellness clinic at your workplace, across every shift. A physician explains your results to you in person, answers the questions a reference table cannot, and arranges a referral where one is warranted. Your individual results stay between you and the clinician. Your employer receives de-identified aggregate data about the group only.
If you want to know what the panel covers before your appointment, our explainer on what a biometric screening is walks through it, and the corporate wellness page covers the wider program.
