15th February 2024

A team in the ICU department have noted that some patients with low calcium levels have long QTc intervals and would like to establish if there is a correlation between the two variables.

A team in the ICU department have noted that some patients with low calcium levels have long QTc intervals and would like to establish if there is a correlation between the two variables. They collected the patient’s calcium levels on blood tests along with the QTc interval obtained from the patient’s ECG performed on the same day. 

Assuming a normal distribution and linear relationship between both variables, which of the following statistical tests is most appropriate?