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Scatter plot showing Spearman correlation between the Hamilton Rating Scale for Depression (HRSD) and brain-derived neurotrophic factor (BDNF) levels before treatment of cases. HRSD A: HRSD score before starting treatment in cases. BDNF A: BDNF levels before starting treatment in patients (ng/ml). The scatter plot showed a significant linear negative correlation (rs = −0.317, p-value = 0.013) between HRSD scores and BDNF levels before treatment.
