Now, let us calculate the false/error rates of the SLR test when compared against the gold standard MRI test results (1).

The **false positive rate** of the SLR test **(Type I error)** is calculated as the ratio between the number of negative MRI results wrongly determined as positive results by the SLR test and the total number of negative MRI results.

The **false negative rate** of the SLR test **(Type II error)** is calculated as the ratio between the number of positive MRI results wrongly determined as negative results by the SLR test and the total number of positive MRI results.

**References:**

- Capra, F., Vanti, C., Donati, R., Tombetti, S., O’reilly, C. and Pillastrini, P., 2011. Validity of the straight-leg raise test for patients with sciatic pain with or without lumbar pain using magnetic resonance imaging results as a reference standard. Journal of manipulative and physiological therapeutics, 34(4), pp.231-238.

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