Evaluation of healthcare resource utilisation and costs associated with anogenital warts in South Africa.

Abstract

Background: Human papilloma virus (HPV), the most prevalent sexually transmitted infection worldwide, and in particular HPV 6 and 11, contribute to >90% of anogenital warts (AGW) cases, and high-risk HPV serotypes cause >95% of cervical cancers in South Africa (SA). The healthcare resource utilisation (HCRU) and costs related to AGW in SA remain poorly understood, in both the public and private sectors.

Objective: To assess the HCRU patterns and associated treatment costs for AGW across the public and private sectors.

Methods: A descriptive, questionnaire-based study was conducted, involving 50 subject matter experts (SMEs) from SA: 24 from the private sector and 26 from the public sector. The study explored resource use, treatment patterns and cost estimation based on SME responses.

Results: Findings revealed that public-sector SMEs treated a larger volume of AGW patients per month (1 - 300) than private-sector SMEs (0 - 20). Most AGW patients were female, comprising 78% in the public sector and 72% in the private sector. The occurrence of AGW was higher in the public sector, ranging between 21.4% and 34.4%, while in the private sector, the occurrence ranged from 13.1% to 23.2%. The weighted cost per patient per episode was higher for females than males in both sectors. In the private sector, costs were ZAR22 482 for females and ZAR17 812 for males, while in the public sector, costs were ZAR19 220 for females and ZAR14 271 for males. The higher costs for females were driven by invasive diagnostic procedures, including vulvar colposcopy and biopsy, and a higher frequency of medical visits (2.0 - 4.4 visits in the public sector). Recurrence rates of AGW were reported at 37.6% in the private sector and 43.9% in the public sector. The total estimated treatment cost of AGW was notably higher in the public sector for both males (ZAR93.6 - ZAR138.5 billion) and females (ZAR135.2 - ZAR207.7 billion), compared with the private sector (males: ZAR11.0 - ZAR19.4 billion; females: ZAR16.7 - ZAR28.3 billion). Female patients experienced a higher burden of diagnosis, recurrence and complications than males.

Conclusion: AGW imposes a substantial burden on SA's healthcare system, particularly in the public sector, where female patients face significant costs and complications. The use of a quadrivalent or nonavalent HPV vaccine, rather than a bivalent vaccine, could reduce the impact of AGW and its associated healthcare demands.