correlation between There's a correlation between smoking and cancer.

negative correlation Some evidence even suggests there is a negative correlation between quality and expenditure in health care (= when one goes up, the other goes down).

positive correlation The study found a positive correlation between sleep and higher achievement at school (= when one increases, the other also increases).

correlation with Do sodium levels in the body have a direct correlation with high blood pressure?

correlation to Some are not convinced that the crackdown on drugs in the city has any correlation to the fall in violent crime.

There is a proven correlation between educational level and income.

correlation between sth and sth The research aims to identify if there is a correlation between corporate reputation and profits.

correlation with sth Does the way workers feel they are perceived by their employers have a correlation with ambition?

a clear/close/direct correlation Expenditure on training has a clear correlation with productivity.

low/little/no correlation Stocks do not respond to rate changes in the same way as bonds do, so there is little correlation between stock and bond value with respect to interest rates.