comparison

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comparison

the basis of analytical epidemiology, the statistical comparison between groups.

comparison groups
the groups between which a statistical comparison is to be made.
comparison population
the population in which a comparison between groups is to be conducted. All of the groups to be used comprise the population.
References in classic literature ?
It reminded me of our old acquaintance; it seemed the natural sequel of it; it showed me that he was unchanged; it relieved me of any uneasiness I might have felt, in comparing my merits with his, and measuring my claims upon his friendship by any equal standard; above all, it was a familiar, unrestrained, affectionate demeanour that he used towards no one else.
I remember that at a later period of my "time," I used to stand about the churchyard on Sunday evenings when night was falling, comparing my own perspective with the windy marsh view, and making out some likeness between them by thinking how flat and low both were, and how on both there came an unknown way and a dark mist and then the sea.
One day I sat down and watched Bacchus seated on the hearthrug, with his moony eyes looking into space so thoughtfully and patiently that I apologized for comparing you to him.
Neither could I be wholly unmoved, after comparing the living with the dead, when I considered how all these pure native virtues were prostituted for a piece of money by their grand-children; who, in selling their votes and managing at elections, have acquired every vice and corruption that can possibly be learned in a court.
The secretary urged her, in his chief's name, to commit no imprudence, to stay at home all day and to be careful of drafts; and Carlotta could not help, after he had gone, comparing this unusual and unexpected advice with the threats contained in the letter.