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Multivariate analysis of factors associated with normal alanine aminotransferase (ALT) levels
| Odds ratio (95% CI) | p Value | |
| Age (young) | 1.07 (1.03 to 1.12) | 0.0008 |
| Female gender (v male) | 2.83 (1.19 to 6.73) | 0.01 |
| Duration of contamination (long) | 1.19 (1.11 to 1.27) | 0.0001 |
| HLA-DRB1*11 (v other phenotypes) | 2.37 (0.99 to 5.66) | 0.050 |
