table 3. Comparison of mean ALT levels in serum according to the status of HGV and HCV RNAs
Viral marker statusa
No. positive
Mean ALT level ± SD (IU/liter)
HGV RNA alone
4
20.5 ± 8.3
HCV RNA alone
46
33.4 ± 29.0
Both HGV and HCV RNAs
7
52.7 ± 63.9
Neither HGV nor HCV RNA
343
16.8 ± 10.9
a Statistical analyses by Student’s t test: HCV RNA alone versus neither HGV nor HCV RNA, P <0.0001; both HGV and HCV RNAs versus neither HGV nor HCV RNA, P < 0.0001. Other comparisons among the four groups were not significant.