Vitamin B12 serum concentrations in 528 apparently healthy human subjects of ages 12-94.
Vitamin B12 serum concentrations in 528 apparently healthy human subjects of ages 12-94.
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528 名 12-94 岁健康受试者的维生素 B12 血清浓度。
DOI：
10.1093/geronj/12.1.32
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发表时间：
1957
期刊：
影响因子：
--
通讯作者：
Nathan W. Shock
中科院分区：
文献类型：
--
作者：
George W. Gaffney;A. Horonick;Kunio Okuda;Paul Meier;Bacon F. Chow;Nathan W. Shock
受试者是2个机构的老年人、男性医疗医院工作人员、州立监狱的男性囚犯和巴尔的摩人口的代表性样本，其中大多数是男性。只有17名20岁以下的受试者，在计算血清维生素B12对年龄的回归时，他们被排除在外。用微生物法测定空腹血清中维生素B12。各组血清维生素B12与年龄的回归系数均达到极显著水平。比较20 ~ 49岁和50 ~ 94岁的人群，在年轻组中，数值小于100、小于150和小于200 µg的发生率百分比。维生素B12/100毫升，0.83、7.02和23.2;老年组的相应百分比为18.2、45.4和74.0。F. C.艾特肯。
The subjects were elderly people in 2 institutions, male medical hospital staff, male inmates of a state prison and a representative sample of the population of Baltimore, most of them men. There were only 17 subjects under 20 years of age and in computing the regression of serum vitamin B12on age they were excluded. Vitamin B12was estimated microbiologically in samples of fasting serum. The regression coefficient of serum vitamin B12on age was highly significant for each of the groups. Comparison of those 20 to 49 years with those 50 to 94 years gave, in the younger group, a percentage incidence of values less than 100, less than 150 and less than 200 µg. vitamin B12per 100 ml., of 0.83, 7.02 and 23.2; corresponding percentages in the older group were 18.2, 45.4 and 74.0.-F. C. Aitken.