Barrett J C
J Epidemiol Community Health (1978). 1978 Dec;32(4):314-6. doi: 10.1136/jech.32.4.314.
Of the three factors, age at death, epoch of death, and epoch of birth, one seems almost superfluous. It may nevertheless be worthwhile to include all three in a mortality analysis, allowing for the constraints that the redundancy imposes. This procedure is applied to data for England and Wales on bladder cancer mortality from 1951 to 1970.
在死亡年龄、死亡时期和出生时期这三个因素中，有一个似乎几乎是多余的。然而，在死亡率分析中纳入所有这三个因素可能仍有价值，同时要考虑到冗余所带来的限制。此程序应用于1951年至1970年英格兰和威尔士膀胱癌死亡率的数据。
