Kinetics, Inc. included the following footnote in its December 31, 2013, financial statements:

We corrected the misstatement of capitalized advertising costs recorded in 2012 by adjusting operating expenses for 2013, and crediting the asset account. The result of this correction is to reduce income by $500,000 for 2013 [a material amount] and reduce recorded assets by a like amount.

How would you determine whether to include reference to the correction in the audit report? If reference is needed, how should it affect the type of audit opinion given?