18. BY : Wu Yingxin Xiang Zheng Yang Hong What’s the difference between AN and BN BACK Type AN Restricting type AN Binge/purge type BN Purging type BN Nonpurging type Weight < 85% of normal < 85% Normal Normal Binge( 暴食 ) No Yes Yes No Compensatory behavior No Yes after binge Yes Yes Amenorrhea( 闭经 ) Yes Yes Not always Not always