Are subsyndromal symptomatic depression and
major depressive disorder distinct disorders?
Zhenghui YI, Yiru FANG
上海精神医学（Shanghai Archives of Psychiatry）
命名：
subsyndromal depressive symptoms (SDS)
Subsyndromal Symptomatic Depression(SSD)
subthreshold depression(StD)
sub-clinical depression
诊断指标：
评分量表
汉密尔顿评分
Hamilton Depression Rating Scale (HAM-D) score
症状：
睡眠障碍、长时间疲劳、反复想到死亡、注意力难以集中
sleep disturbances (44.7%)
prolonged fatigue (42.1%)
repetitive thoughts of death (31%)
difficulty concentrating (22.7%)
SSD和MDD或不属于同一谱系
SSD和MDD在人格特征、神经生化特征、和基因表达等方面存在显著异质性，提示它们不属于同一谱系疾病，应作为独立的精神障碍予以治疗。
Significant heterogeneity between SSD and MDD in personality
traits, neurobiochemical characteristics,and gene
expression suggests that they do not belong to the same
spectrum of disease and should therefore be treated as
independent mental disorders.