Prevalence of high-risk human papillomavirus in an inner-city population with atypical squamous cells of undetermined significance.

OBJECTIVE

To compare the prevalence of high-risk human papillomavirus (HPV) in patients with atypical squamous cells of undetermined significance (ASCUS) cytology in an inner-city clinic and a private office population to determine if HPV screening is useful in either group before colposcopy.

METHODS

After an institutional review board approval at Hartford Hospital, we reviewed the charts of patients with ASCUS cytology and high-risk HPV DNA who were seen at the Community Health Services, Inc. in Hartford, CT (clinic patients), between January 1, 2000, and July 1, 2004, and at a private practice site in Hartford, CT (private patients), between January 1, 2004, and December 31, 2004. All charts were reviewed for demographic information, history of sexually transmitted diseases, tobacco, alcohol, and other drug use. A power analysis indicated that 32 patients would be needed in each group for a p <.05 with 80% confidence.

RESULTS

A total of 257 patient's charts were reviewed: 79 clinic charts and 178 private office charts. Three patients were eliminated due to a lack of HPV testing. High-risk HPV was identified in 94.9% of the clinic patients and 45.5% of the private patients. The populations were statistically different with regard to history of chlamydia (26.6% of clinic patients and 6.2% of private office patients; p <.0001), gonorrhea (11.4% clinic patients and 1.1% of private patients; p =.0005), and trichomonas (7.6% of clinic patients and 0% of private office patients; p =.0007). The prevalence of herpes simplex virus in clinic patients was 2.5%, whereas it was present in 6.2% of private patients (p =.35). Tobacco use was significantly higher in clinic patients (31.6% of clinic patients and 15.2% of private patients; p =.009).

CONCLUSIONS

In our study, 94.9% of the women in the clinic population with an ASCUS cytology had high-risk HPV compared with a rate of 45.5% in the private patients studied. Because most clinic patients with ASCUS have high-risk HPV, it is reasonable to defer reflex testing for HPV in these high-risk patients and proceed straight to colposcopy.