Metabolic syndrome: five measurements that travel together
Not one disease but a cluster, and the cut-offs for South Asian patients are tighter than the ones printed on most lab reports. Any three of the five makes the diagnosis.
Patients are frequently told their reports are a little off in several places at once — sugar slightly up, triglycerides up, good cholesterol down, pressure borderline, waist growing — and that none of it is yet a problem. Taken individually that is almost true. Taken together it has a name, and the name carries a risk none of the individual numbers does.
The five
- Waist circumference — about 90 cm or more in men, 80 cm or more in women, using South Asian thresholds
- Triglycerides — 150 mg/dL or above, or already on treatment for it
- HDL cholesterol — below 40 mg/dL in men, below 50 mg/dL in women
- Blood pressure — 130/85 or above, or already on treatment for it
- Fasting glucose — 100 mg/dL or above, or already on treatment for it
Any three of those five makes the diagnosis. Note that being treated for one counts: a patient whose pressure is 120/78 on tablets still meets that criterion. The syndrome does not disappear because a medicine is covering one of its parts.
Why the cluster matters more than its parts
Because the five are not five unrelated faults. They are five readings taken off one underlying process — insulin resistance — which is why they arrive together and why treating them one tablet at a time tends to leave the patient on a lengthening list of tablets while the process itself continues.
The measurement nobody takes
Four of the five come off a blood sample. The fifth needs a tape measure, which is why it is the one most often left out of a file — and it is arguably the most informative of them. Measure at the midpoint between the lowest rib and the top of the hip bone, standing, at the end of a normal breath out. Not over clothing, and not pulled tight.
Weight on a scale does not substitute for it. Two patients at the same weight can carry it very differently, and it is the central fat — around the liver and the organs rather than under the skin — that drives the rest of the cluster.
What an assessment covers
- Waist, weight and blood pressure, measured rather than estimated
- Fasting glucose and HbA1c
- A full lipid profile, read for triglycerides and HDL and not only total cholesterol
- Liver function and an ultrasound where fatty liver is suspected
- Kidney function, because the syndrome and the kidneys are linked
- Thyroid function and vitamin D, which affect the picture and are routinely untested
What then changes is diet composition, meal timing, movement and sleep, with the measurements repeated at a fixed interval so progress is a fact rather than an impression. A plan that has not moved the numbers by the second review is changed, not repeated.
Metabolic syndrome substantially raises cardiovascular risk. Nothing here replaces the cardiac, blood-pressure or diabetes treatment your physician has prescribed, and no supplement is offered as an alternative to it.
Questions people ask
- What are the criteria for metabolic syndrome?
- Three or more of five: increased waist circumference, raised triglycerides at or above 150 mg/dL, low HDL cholesterol below 40 mg/dL in men or 50 mg/dL in women, blood pressure at or above 130/85, and fasting glucose at or above 100 mg/dL. Treatment for any of these counts towards the criterion.
- Why is the waist cut-off different for Pakistani patients?
- South Asian populations develop insulin resistance and metabolic disease at a lower body size than European populations, so international guidance uses a lower threshold — about 90 cm for men and 80 cm for women, against 102 cm and 88 cm. A patient whose waist is called normal on a European chart may be well past the threshold that matters for them.
- Is metabolic syndrome the same as diabetes?
- No. It is the state that commonly precedes type 2 diabetes and raises cardiovascular risk markedly, often for years before any blood sugar reading crosses the diabetic line. It is the stage at which intervention is most effective and most often missed.