The risk factors that increase the likelihood of detecting precancerous cells in the cervix during a Smear test are as follows:

* Onset of sexual activity at an early age
* Having multiple sexual partners
* History of sexually transmitted infection (STI) (e.g., gonorrhea, syphilis, herpes virus infection)
* Presence of genital warts (HPV infection)
* Inadequate genital hygiene
* Smoking