The effect of the treatment varies with different individuals.

疗效因人而异。

《新英汉大辞典》

they show variation in different individuals.

例如，它们在不同的人中显示差异。

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Different Individuals’ Preferences Can’t Be Combined

不同人的偏好不能加总

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It said that Forbes had applied "differing standards of proof for different individuals".

BBC: Forbes list understates my wealth, Saudi prince says

Nothing, not even Galton's original analysis, has anything to say about the likelihood of fragments of prints coinciding in different individuals.

ECONOMIST: Fingering fingerprints | The

However, I would not accept for a minute a verdict of psychopathy based on a selective combination of characteristics of half a dozen different individuals.

ECONOMIST: Google's search for cash