Serum ALAT concentrations.

(A) The cumulative proportion of patients developing a serum ALAT concentration higher than 100 U/L, and (B) the number of patients with serum ALAT higher than 100 U/L at each time of measurement. Statistically significantly fewer patients in the group given UDCA exceeded this blood level (2.5 times the upper limit of normal), and, with one exception, the number of patients exceeding this level was always higher in the group not given UDCA.