GSTM1 and bulimia nervosa: In the ED group, the mean change in oxy-Hb concentration during the LFT in channel 18 was significantly correlated with the score on the drive for thinness subscale of the EDI-2 (r = 0.67, p < 0.01), and the mean change in channel 12 was significantly correlated with the score on the bulimia subscale of the EDI-2 (r = 0.56, p < 0.05).