Table 4.

Potential causes of error when evaluating urine via dipstick method [32].

• Refrigerated urine sample did not return to ambient temperature before testing

• Disinfectant-contaminated urine-from skin or cleaning before collection

• Reactive stripes expired

• Improper air- or light-exposure storage

• Transfer of chemical reagents from one study to the next while the report is vertically interpreted rather than for the horizontal

• Tests read at the wrong time

• Urine with a high pigmentation

• Failure to use urinary monitoring to test strip accuracy