Waist-to-height ratio emerges as simple screening tool for paediatric liver disease risk

Researchers in China and the US find that a straightforward waist-to-height ratio of 0.48 can reliably identify children at risk of metabolic dysfunction-associated steatotic liver disease, offering a cost-effective alternative to complex screening methods and promising broader access in re

Researchers in China say a simple waist-to-height ratio may offer a practical way to spot children at risk of metabolic dysfunction-associated steatotic liver disease, a condition now seen as the most common chronic liver disease in young people. The study, led by Peking University and published in the World Journal of Pediatrics, suggests that a tape measure and a clear cut-off could do much of the work now often assigned to more complex screening methods. Doctors have long linked MASLD with obesity, insulin resistance and inherited risk, and Mayo Clinic says the condition can progress to cirrhosis or liver cancer if it is not caught early.

The team tested waist-to-height ratio across Chinese schoolchildren and data from the US National Health and Nutrition Examination Survey, or NHANES, to see whether the measure held up across different ethnic groups and genetic backgrounds. Their analysis found only modest genetic differences at liver-disease-related loci, even though inherited risk did slightly alter theoretical cut-offs for some body-shape markers. By contrast, waist-to-height ratio stayed remarkably steady, while more elaborate indices such as the visceral adiposity index shifted more noticeably as genetic risk increased.

In the US data, a waist-to-height ratio of 0.48 performed well in most groups, including non-Hispanic White, Black and Asian children, though the result was weaker in the “other Hispanic” category. The researchers also found that adding genetic risk scores offered little extra benefit, which strengthens earlier studies suggesting that waist-to-height ratio is a useful, low-cost screening tool for paediatric fatty liver disease. Separate studies in children have likewise pointed to the ratio as a simple way to flag abdominal obesity, a major driver of liver fat accumulation.

The findings could matter most in places where access to genetic testing is limited. The authors argue that primary care practices, school health programmes and community workers may be able to use the ratio as a frontline check, then refer children with a high reading for further assessment. That said, WHtR remains a screening measure rather than a diagnosis, and positive results still need clinical confirmation. Mayo Clinic’s paediatric guidance says MASLD is now the leading cause of liver disease in children and can affect a substantial share of those with obesity in the US, underscoring the need for early detection.