an increasing trendP < .001
We also detected an increasing trend in younger whites, where the proportion of IDU-IE increased from 57.0% in 2000 to 80.3% in 2013 ( P < .001) (Figure 1 D).
We also detected an increasing trend in younger whites, where the proportion of IDU-IE increased from 57.0% in 2000 to 80.3% in 2013 ( P < .001) (Figure 1 D).