Two dependent variables were explored separately in the logistic regression: «sharing» - injecting with used syringes or front/backloading i.e., employing a used syringe to prepare the drug solution, which is then divided into one or more syringes for injection and «reusing one's own syringes» - because these practices involve very different risks of transmitting infections and to avoid problems of co-linearity.
En la regresión logística se exploraron separadamente, como variables dependientes, inyectarse con jeringas usadas o diluir la droga en jeringas usadas «compartir», y reutilizar jeringas propias, por ser conductas que implican riesgos muy distintos de transmisión de infecciones y para evitar problemas de colinealidad.