Report

ARTISTIC: a randomised trial of human papillomavirus (HPV) testing in primary cervical screening

Authors: Kitchener HC, Almonte M, Gilham C, Dowie R, Stoykova B, Sargent A, Roberts C, Desai M, Peto J

Journal: Health Technology Assessment Volume: 13 Issue: 51

Publication date: November 2009

DOI: 10.3310/hta13510

Citation:

Kitchener HC, Almonte M, Gilham C, Dowie R, Stoykova B, Sargent A, et al.ARTISTIC: a randomised trial of human papillomavirus (HPV) testing in primary cervical screening. Health Technol Assess 2009;13(51)


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  • Abstract

Abstract

Objectives

Primary cervical screening uses cytology to detect cancer precursor lesions [cervical intraepithelial neoplasia stage 3 or beyond (CIN3+)]. Human papillomavirus (HPV) testing could add sensitivity as an adjunct to cytology or as a first test, reserving cytology for HPV-positive women. This study addresses the questions: Does the combination of cytology and HPV testing achieve a reduction in incident CIN3+?; Is HPV testing cost-effective in primary cervical screening?; Is its use associated with adverse psychosocial or psychosexual effects?; and How would it perform as an initial screening test followed by cytology for HPV positivity?

Design

ARTISTIC was a randomised trial of cervical cytology versus cervical cytology plus HPV testing, evaluated over two screening rounds, 3 years apart. Round 1 would detect prevalent disease and round 2 a combination of incident and undetected disease from round 1.

Setting

Women undergoing routine cervical screening in the NHS programme in Greater Manchester.

Participants

In total 24,510 women aged 20-64 years were enrolled between July 2001 and September 2003.

Interventions

HPV testing was performed on the liquid-based cytology (LBC) sample obtained at screening. Women were randomised in a ratio of 3:1 to have the HPV test result revealed and acted upon if persistently positive in cytology-negative cases or concealed. A detailed health economic evaluation and a psychosocial and psychosexual assessment were also performed.

Main outcome measures

The primary outcome was CIN3+ in round 2. Secondary outcomes included an economic assessment and psychosocial effects. A large HPV genotyping study was also conducted.

Results

In round 1 there were 313 CIN3+ lesions, representing a prevalence in the revealed and concealed arms of 1.27% and 1.31% respectively (p = 0.81). Round 2 (30-48 months) involved 14,230 (58.1%) of the women screened in round 1 and only 31 CIN3+ were detected; the CIN3 rate was not significantly different between the revealed and concealed arms. A less restrictive definition of round 2 (26-54 months) increased CIN3+ to 45 and CIN3+ incidence in the arms was significantly different (p = 0.05). There was no difference in CIN3+ between the arms when rounds 1 and 2 were combined. Prevalence of high-risk HPV types was age-dependent. Overall prevalence of HPV16/18 increased with severity of dyskaryosis. Mean costs per woman in round 1 were 72 pounds and 56 pounds for the revealed and concealed arms (p < 0.001); an age-adjustment reduced these mean costs to 65 pounds and 52 pounds. Incremental cost-effectiveness ratio for detecting additional CIN3+ by adding HPV testing to LBC screening in round 1 was 38,771 pounds. Age-adjusted mean cost for LBC primary screening with HPV triage was 39 pounds compared with 48 pounds for HPV primary screening with LBC triage. HPV testing did not appear to cause significant psychosocial distress.

Conclusions

Routine HPV testing did not add significantly to the effectiveness of LBC in this study. No significant adverse psychosocial effects were detected. It would not be cost-effective to screen with cytology and HPV combined but HPV testing, as either triage or initial test triaged by cytology, would be cheaper than cytology without HPV testing. LBC would not benefit from combination with HPV; it is highly effective as primary screening but HPV testing has twin advantages of high negative predictive value and automated platforms enabling high throughput. HPV primary screening would require major contraction and reconfiguration of laboratory services. Follow-up continues in ARTISTIC while maintaining concealment for a further 3-year round of screening, which will help in screening protocol development for the post-vaccination era.

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