Objective:

To determine which factors are associated with the use of dual protection in obstetrics students from a public university in Lima, Peru.

Methods:

Analytical cross-sectional study, done in 217 obstetrics students from the Universidad Nacional Mayor de San Marcos. The chi-squared test was applied, in addition to the raw and adjusted prevalence ratio (PR).

Results:

The prevalence of the use of dual protection was 41,5%. In the bivariate analysis, the factors associated with it included: age from 25 to 29 years old (raw prevalence ratio: 1,57), Lima as a place of origin (raw prevalence ratio: 2,07), previous pregnancy (raw prevalence ratio: 1,91), previous abortion (raw prevalence ratio: 1,92), antecedent of STI in the couple (raw prevalence ratio: 1,81), knowledge about dual protection (raw prevalence ratio: 3,16), and orientation in family planning (raw prevalence ratio: 1,76). In the multivariate analysis, knowledge about contraceptive protection maintained its significant association (adjusted prevalence ratio: 2,44).

Conclusions:

Knowledge about contraceptive protection is the only reproductive factor that was associated with a higher probability of using this method.