Rewat TaksinamaneeNongnuch Settasatian2011-02-242011-02-242010-05-052010-05-05Srinagarind Medical Journal (SMJ); Vo. 2 No. 1 January - March 1987; 15-22http://imsear.searo.who.int/handle/123456789/133723The reference interval of serum Y-glutamyltransferase for Thai people was carried out in 103 healthy men and 98 healthy woman. The enzyme activity ranged from 2.13 to 40.21 IU/L and 0.18 to 32.34 IU/L for men and women respectively. No singnificant difference of the enzyme activity between sexes was demonstrated ( p \> 0.05 ). However, the enzyme activity of subjects in both sexes which aged below 20 years showed a less activity and significant difference than those aged above 20 years. ( p \< 0.05 )en-USAcademic Affairs, Faculty of Medicine, Khon Kaen University, KhonKaen, ThailandOriginal Articles