1.什么叫标化死亡比? 标化死亡比(SMR)是指观察人群的死亡数(O)与预期死亡数(E)的比值,习惯上将这比值乘以100来表示。如某厂砷作业工人十年间死于肺癌10人,这期间该厂各年龄组人年数(ni)及标准人群(对照组)肺癌的年龄别死亡率(ri)如表,以各年龄组的ni乘以ri,乘积相加,即为预期死亡数,本例为3.78人,则肺癌的标化死亡比为:10/3.78×100=264,故|SMR=O/E 1. What is the ratio of standardized deaths? The standardized death rate (SMR) is the ratio of observed deaths (O) to expected deaths (E), as is customary to multiply this ratio by 100. If a factory workers arsenic workers died of lung cancer in 10 years, the age of the plant during this period (ni) and standard population (control group) lung cancer age-specific mortality (ri) as shown in Table ni multiplied by ri, the product of the sum, that is, the expected number of deaths, in this case 3.78 people, the standard of death for lung cancer: 10 / 3.78 × 100 = 264, so | SMR = O / E