Population features of sex and stress hormones levels in young men blood serum

Testosterone, estradiol, noradrenaline, adrenaline, cortisol levels in blood serum of Ukrainian and Indian young men and interrelations between those parameters, neuroticism and physical aggression were studied.Higher noradrenaline and estradiol contents were revealed in Indian men population as compared with Ukrainian one.Both in total group of participants and men of every population no interrelation between investigated parameters and neuroticism was found, but in Indian men the strong negative correlation between noradrenaline and physical aggression was observed.After division of all participants into 3 subgroups depending on neuroticism level, in persons with high neuroticism the significant positive correlation between neuroticism and cortisol and significant negative correlations between noradrenaline and neuroticism, between noradrenaline and physical aggression were observed.In individuals with middle neuroticism level the strong positive correlations between estradiol and neuroticism and between testosterone and physical aggression were found.Obtained results indicate the different contribution of cortisol and estradiol to formation of high and middle neuroticism levels.The increased content of noradrenaline in men of Indian population appears to provide the potent control of neuroticism and physical aggression expression.In all subgroups (Ukrainian and Indian men, persons with high and middle neuroticism) the strong positive correlation between testosterone to noradrenaline ratio and cortisol to noradrenaline ratio was found.