aggregation

...In the past, such individual health checkups were distinguished from group health checkups, and the latter were called mass examinations, but nowadays the term health checkup refers to mass examinations, and the two are often used synonymously.
[Health Checkups and Groups]
The groups that are the subject of health examinations are either social groups (what R. M. McIver calls associations) or non-social groups (aggregations). The former are places of business, government offices, schools, neighborhoods, households, etc. (or the social groups within them).

*Some terminology explanations that mention "aggregation" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…かつてはこのような個人の健康診断と集団のそれとを区別して，後者を集団検診mass examinationとよんだが，現在では健康診断といえば集団検診をさし，同義に用いられることが多い。
［健康診断と集団］
　健康診断の対象となる集団には，社会集団(R.M.マッキーバーのいうアソシエーションassociation)の場合と，非社会的な集団(アグリゲーションaggregation)の場合とがある。前者は，事業所，官公庁，学校，地域，家庭など(またはその内部の社会集団)である。…

※「aggregation」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報