Participants with a previous diagnosis of liver steatosis had higher ALT (median 84 U/L, range 44–162 U/L, vs 23.5 U/L, range 11–44 U/L, p < 0.001) and GGT (median 108.5 U/L, range 31–574 U/L, vs 17.5 U/L, range 11–52 U/L, p < 0.001), were older (median 12.7 years, range 11.7–14.5 years, versus 7.6 years, range 4.8–16.6 years, p = 0.042) and had more severe neurological disability (median 50.75%, range 41–70%, versus 78.5%, range 57–96%, p = 0.002) compared to participants without a previous diagnosis of liver steatosis. Here, GPT is linked to fatty liver disease.