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Figure 3: Patterns of hearing loss and asymmetry by exposure to gunfire, men only. (a) Thresholds by level of exposure - summary box plots extend from the 25th to 75th percentiles, with a midline at the median, "+" at the mean and vertical lines extending to the 5th and 95th percentiles. (b) Mean thresholds by ear and level of exposure - shaded region extends to the mean for men reporting no shooting, while "" shows the corresponding mean for the low exposure group and "" shows the corresponding mean for the high exposure group. (c) Asymmetry by right or left shooting exposure - individual subject differences between ears (left minus right) are summarized with box plots (described in a) for those who reported no shooting and those who reported shooting right and those who reported shooting left. (d) Mean asymmetry by shooting exposure - for individual subjects showing at least a 5 dB change from baseline at one or more high frequencies (3-8K Hz), the mean asymmetry (left minus right ear) over the high frequencies is plotted versus the maximum change from baseline. Filled circles and the solid line show subjects reporting no shooting, open circles and the fine dashed line show subjects who reported shooting right and squares and the heavy dashed line show subjects who reported shooting left. Lines illustrate trends using a cubic spline smoothing function

Figure 3: Patterns of hearing loss and asymmetry by exposure to gunfire, men only. (a) Thresholds by level of exposure - summary box plots extend from the 25<sup>th</sup> to 75<sup>th</sup> percentiles, with a midline at the median, □" shows the corresponding mean for the low exposure group and "" shows the corresponding mean for the high exposure group. (c) Asymmetry by right or left shooting exposure - individual subject differences between ears (left minus right) are summarized with box plots (described in a) for those who reported no shooting and those who reported shooting right and those who reported shooting left. (d) Mean asymmetry by shooting exposure - for individual subjects showing at least a 5 dB change from baseline at one or more high frequencies (3-8K Hz), the mean asymmetry (left minus right ear) over the high frequencies is plotted versus the maximum change from baseline. Filled circles and the solid line show subjects reporting no shooting, open circles and the fine dashed line show subjects who reported shooting right and squares and the heavy dashed line show subjects who reported shooting left. Lines illustrate trends using a cubic spline smoothing function">