We investigated correlation between psychological stress level and one of the physiological stress biomarkers, salivary cortisol level of healthy men and women, cadets of Air Force Academy. Salivary cortisol level of individuals correlated positively with psychological stress test score (r=0.319), but it could not compatible in normal healthy individuals. On the contrary, salivary cortisol level correlated highly with psychological stress test score in individuals, who belongs to the upper 25% group based on their salivary cortisol level (r=0.626). We report that psychological stress score based on self reporting and salivary cortisol level may not be compatible in healthy men and women, however, quantitative scales come from both of measurements can be used for same purpose in some of healthy individual with relatively higher stress level(>8.5 ng/ml cortisol). In comparison between groups, second grade cadets with relatively higher score in psychological stress test had significantly higher salivary cortisol level than third year cadets with relatively low stress score in psychological stress test (p<0.002). Second grade cadets had significantly lower number of white blood cells (p<0.02) and red blood cells (p<0.03) than third year cadets. We supposed that physiological reponses against to life stressors may relate to immunity in normal situation because second grade cadets represented higher stress level had lower number of blood cells.
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