compare A to B?

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This figure compares the beneficial effects of physical activity to the positive relationships ?

What does "compare ... to..." mean?

Context:

This figure compares the beneficial effects of physical activity on the brains of healthy aging individuals (n = 299) to the positive relationships between exercise and brain structure in cognitively impaired persons with either mild cognitive impairment or Alhzeimer's (n = 127).

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@oristarA,

The comparison is between healthy people and those with a cognitive impairment to determine the benefits of exercise on both groups.

This figure compares the beneficial effects of physical activity on the brains of healthy aging individuals (n = 299) to the positive relationships between exercise and brain structure in cognitively impaired persons with either mild cognitive impairment or Alzheimer's (n = 127).

The sentence isn't well written so I can see why it was confusing.

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@boomerang,

Thanks.

But I have failed to understand you, Boomerang.

Sure the comparison is happended between healthy people and the ill ones. But, for example, though we can compare the body weight between the two groups, we cannot compare the body weight of A group to the height of B group.

And now, in the thread, A = the beneficial effects of physical activity; B = the positive relationships. That is why it causes confusion.

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@oristarA,

The "positive relationship" is the relationship between activity and brain structure, not a positive relationship as in an interpersonal relationship (like love).

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@oristarA,

Beneficial effects = positive relationships.

The author is trying to use two different phrases to say the same thing in an effort not to repeat himself. It could be written as below.

Quote:

This figure compares the beneficial effects of physical activity on the brains of healthy aging individuals (n = 299) to the beneficial effects of physical activity on the brains of cognitively impaired persons with either mild cognitive impairment or Alhzeimer's (n = 127).

1 Reply

@engineer,

engineer wrote:

Beneficial effects = positive relationships.

The author is trying to use two different phrases to say the same thing in an effort not to repeat himself. It could be written as below.

Quote:
This figure compares the beneficial effects of physical activity on the brains of healthy aging individuals (n = 299) to the beneficial effects of physical activity on the brains of cognitively impaired persons with either mild cognitive impairment or Alhzeimer's (n = 127).

Cool.
Got it.
Thank you.

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compare A to B?

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