an increasing trendP < 0.001
The HCV antibody-positivity rate showed an increasing trend with ages (χ 2 line = 45.332, r = 0.011, P < 0.001) (Fig. 3 ).
The HCV antibody-positivity rate showed an increasing trend with ages (χ 2 line = 45.332, r = 0.011, P < 0.001) (Fig. 3 ).