A nurse is collecting data from a client who is African-American. Which of the following areas should the nurse check to determine the presence of pallor?

"I should consume no more than 2,000 milligrams of sodium per day." This is an appropriate statement because consuming too much sodium is associated with an increased risk for hypertension.

Choice A is not correct because there is not enough evidence to support the idea that consuming fish once per week can prevent hypertension.

Choice B is not correct because maintaining a healthy weight is important, but is not as directly related to preventing hypertension as reducing sodium intake.

Choice D is not correct because exercising 30 minutes three times per week is not enough to prevent hypertension.

Palpable area of induration, greater than 10 mm (0.4 in) in diameter. This indicates a positive tuberculin skin test (TST) reaction for a person with no known risk factors for TB infection. A positive TST reaction means that the person has been infected with Mycobacterium tuberculosis, the bacterium that causes TB disease, and needs further testing to confirm the diagnosis and rule out active TB disease.

The other choices are not correct because:

- Choice A. Nonpalpable area of redness, less than 5 mm (0.2 in) in diameter. This indicates a negative TST reaction for any person, regardless of their risk factors for TB infection. A negative TST reaction means that the person has not been infected with Mycobacterium tuberculosis or has a very low level of immune response to the bacterium.

- Choice B. Area of ecchymosis, greater than 12 mm (0.5 in) in diameter. This indicates a bruise or bleeding under the skin, not a TST reaction. Ecchymosis is not caused by the injection of tuberculin purified protein derivative (PPD) into the skin, but by trauma or injury to the blood vessels.

- Choice C. Tenderness at the injection site. This indicates a mild local reaction to the injection of tuberculin PPD into the skin, not a TST reaction. Tenderness is not measured in millimeters of induration (firm swelling), which is the standard way of reading TST results.