METHOD OF ESTIMATING INDIVIDUAL RISK OF INFECTING WITH SEXUALLY COMMUNICATED INFECTIONS Russian patent published in 2005 - IPC

FIELD: epidemiology and dermatology.

SUBSTANCE: invention, in particular, relates to such infective diseases as syphilis, gonorrhea, chancroid, urogenital chlamidiosis, etc. By questioning a person, additional information is collected concerning sexual partners during a year and average number of coituses with one partner. Probability of contacting a contagious sexual partner in male/female population (P_m/f) is then found from following formula: P_m/f ~ (mD_f/mQ_f/m)/(Mq_f/mAP), where m/M represents infection danger factor (m is annual number of diseased persons and M population number); D_f/m duration of infection period for women and men, respectively; Q_f/m percentage of women and men, respectively, in population; A percentage of sexually active persons in population; and P percentage of persons with polygamous behavior in sexually active population. After that, contagion probability is determined by calculating annual individual infection risk using following formula: annual individual infection risk , where is average probability of contagion with given sexually communicating infection caused by one coitus; average number of coituses with each partner; probability for each partner to be infected and N number of sexual partners in unit time period.

EFFECT: enabled estimation of individual risk of infecting with different sexually communicated infections in regard to different infections and regarding selected population.

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