O'Brien J P
Arch Gen Psychiatry. 1977 Oct;34(10):1165-9. doi: 10.1001/archpsyc.1977.01770220047004.
At the Massachusetts General Hospital between 1964 and 1974, there was an estimated 118% increase in emergency ward admissions for drug overdose suicide attempts and an estimated 257% increase in such attempts by individuals in the 20- to 29-year age range. Approximately 67% of overdoses seen in 1972 and 1974 occurred in individuals under age 30. An increase in drug overdose suicide attempts by males was noted. By 1972, males were making approximately as many attempts as females. Based on extrapolations from the Massachusetts General Hospital drug overdose data, and not including an estimate of non-hospital-treated suicide attempts, an estimated annual (1972) suicide attempt rate of 337/100,000 (0.38%) was obtained for Boston. The estimated suicide attempt-completed suicide ratio for the Boston area was 39:1. These estimates should be interpreted as giving an approximate order of magnitude and not as specifying precise rates.
1964年至1974年间，麻省总医院因药物过量自杀未遂而急诊入院的人数估计增加了118%，20至29岁年龄段人群的此类未遂事件估计增加了257%。1972年和1974年所见的药物过量事件中，约67%发生在30岁以下人群。男性药物过量自杀未遂事件有所增加。到1972年，男性的未遂次数与女性大致相同。根据麻省总医院药物过量数据推断，且不包括未在医院治疗的自杀未遂估计数，得出波士顿1972年的自杀未遂年发生率估计为337/10万（0.38%）。波士顿地区自杀未遂与自杀死亡的估计比率为39:1。这些估计应理解为给出大致数量级，而非具体精确比率。
