AUTOMATIC LINKAGE OF VITAL RECORDS
AUTOMATIC LINKAGE OF VITAL RECORDS
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DOI:
10.1126/science.130.3381.954
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发表时间:
1959-01-01
期刊:
影响因子:
56.9
通讯作者:
JAMES, AP
中科院分区:
文献类型:
--
作者:
NEWCOMBE, HB;KENNEDY, JM;JAMES, AP
Methods Of primary interest was the develop-ment of a procedure which would be fully automatic and free from piecemeal operations which might later limit the usefulness of the approach. This aim was achieved, chiefly because the use of a computer made it possible to compare each birth record in turn with all of the marriage records in appropriate sec-tions of the marriage file. Since groups of marriages were sometimes scanned a number of times, it is apparent that this operation could not have been carried out withconventional card-handling equipment. Thus, without the computer, a visual search through printed lists would have been required to achieve some of the linkages. To reduce the number of marriage records with which the computer must compare a birth record, it was decided to make use of both thehusband's surname and the wife's maiden name, these being present on both the marriage and the birth cards. The surnames were first reduced to phonetic codes, consisting in each case of the first letter of the name followed by three numeric digits and known as the Russell Soundex Code (8), the computer being used for the coding operation. The codes served two purposes: They were designed to remain unchanged with many of the common spelling variations and in the present application were thus expected to bring together linkable records which would have been widely separated if arranged in a strictly alphabetic sequence. The coding also simplified the subsequent use of the Datatron computer, which is essentially a mathematical instrument and works more readily with numbers than it does with letters. The extent to which twosurnames are more efficient than one for identify-ing a family group has probably not been generallyrecognized. Thus, of the various brides' maiden names encoun-tered in the marriage file, more than half recurred (in their coded forms) with frequencies in the range from 64 up to 1024 per 105. In contrast to this, nearly 80 percent of the pairs of family names (in their coded forms) were unique; that is, they occurred only once in our file in that particular combina-tion, and extremely few had frequencies exceeding 4 per 10 (see Fig. 1). This