Meanings of associated with elevation in English

In the tropics, the key temperature gradient is associated with elevation.

Now only cosmetic change, but also it is associated with elevation of lipid and glucose level.

The plasma leptin level increase was not associated with elevation of body mass index, even though these two variables were highly correlated.

Hence, the involvement of abiotic factors such as temperature and drought in the chemical polymorphism of O. vulgare associated with elevation is briefly discussed.