If the population tested is representative of the general population, then what are the PV+ and PV

Question:

If the population tested is representative of the general population, then what are the PV+ and PVˆ’ using this test?

Hypertension
Laboratory measures of cardiovascular reactivity are receiving increasing attention. Much of the expanded interest is based on the belief that these measures, obtained under challenge from physical and psychological stressors, may yield a more biologically meaningful index of cardiovascular function than more traditional static measures. Typically, measurement of cardiovascular reactivity involves the use of an automated blood-pressure monitor to examine the changes in blood pressure before and after a stimulating experience (such as playing a video game). For this purpose, blood-pressure measurements were made with the Vita- Stat blood-pressure machine both before and after playing a video game. Similar measurements were obtained using manual methods for measuring blood pressure. A person was classified as a €œreactor€ if his or her DBP increased by 10 mm Hg or more after playing the game and as a nonreactor otherwise. The results are given in Table 3.11.

Table 3.11: Classification of cardiovascular reactivity using an automated and a manual sphygmomanometer

ADBP, manual ADBP, automated <10 210 51 <10 15 210