Joyce P R
Aust N Z J Psychiatry. 1987 Mar;21(1):82-6. doi: 10.3109/00048678709160903.
From 1974 to 1984 in New Zealand there was a significant decline in first psychiatric admissions for the functional psychoses. This decline is due to decreasing first admission rates for schizophrenia and depressive psychoses, despite an increasing first admission rate for mania. Although a small part of the declining first admission rate for schizophrenia may be due to the increasing diagnosis of mania, this is insufficient to explain all the decline and suggests an actual decline in the incidence of schizophrenia. Over this same period readmissions for functional psychoses increased, with the most marked increase being in manic readmissions. Although a variety of factors influence readmission rates, the marked rise in manic readmissions suggests broadening diagnostic criteria for mania.
1974年至1984年期间，新西兰功能性精神病首次入院治疗的人数显著下降。这种下降是由于精神分裂症和抑郁性精神病的首次入院率降低，尽管躁狂症的首次入院率有所上升。虽然精神分裂症首次入院率下降的一小部分原因可能是躁狂症诊断增加，但这不足以解释所有下降情况，表明精神分裂症的发病率实际有所下降。在同一时期，功能性精神病的再次入院人数增加，其中躁狂症再次入院人数增加最为显著。尽管多种因素影响再次入院率，但躁狂症再次入院人数的显著增加表明躁狂症的诊断标准在放宽。
