title: Stable patients and patients with advanced disease: consensus definitions to support sustained scale up of antiretroviral therapy.
abstract: As guidelines are evolving towards recommending starting antiretroviral therapy (ART) in all HIV-positive individuals irrespective of clinical and immunological status, HIV programmes will be challenged to manage an increasingly diverse set of patient needs. To support global guideline recommendations for differentiated service delivery, WHO developed consensus definitions for two distinct patient populations: patients presenting with advanced disease and patients who are stable on ART.
  
  
  
  An expert panel consisting of 73 respondents from 28 countries across all six WHO regions supported the development of these definitions. The panel included clinicians, researchers, programme managers, technical advisors and patient group representatives.
  
  
  
  Patients presenting with advanced disease at presentation to care were defined as CD4 count <200 CD4 cells/mm(3) or WHO Stage III & IV defining illness. Patients stable on ART were defined as those who were receiving ART for at least 1 year with no adverse drug reactions requiring regular monitoring, no current illnesses or pregnancy, a good understanding of lifelong adherence, and evidence of treatment success. Treatment success was defined as two consecutive undetectable viral load measures or, in the absence of viral load monitoring, rising CD4 counts or CD4 counts above 200 cells/mm(3) and an objective adherence measure.
  
  
  
  Patients who are stable on ART should be offered a less intensive care package that can lead to improved outcomes while saving resources, including less frequent clinic visits, out-of-clinic drug refills and reduced laboratory monitoring. This will allow for clinic resources to be directed towards reducing morbidity and mortality among patients presenting with advanced disease.
authors.affiliation: Department of HIV, World Health Organization, Geneva, Switzerland.
authors.forename: Greer
authors.initials: G
authors.lastname: Waldrop
authors.affiliation: Department of HIV, World Health Organization, Geneva, Switzerland.
authors.forename: Meg
authors.initials: M
authors.lastname: Doherty
authors.affiliation: Department of HIV, World Health Organization, Geneva, Switzerland.
authors.forename: Marco
authors.initials: M
authors.lastname: Vitoria
authors.affiliation: Department of HIV, World Health Organization, Geneva, Switzerland.
authors.forename: Nathan
authors.initials: N
authors.lastname: Ford
mesh_terms: D000328:Adult; D019380:Anti-HIV Agents / Q000627:therapeutic use*; D023241:Antiretroviral Therapy, Highly Active; D018791:CD4 Lymphocyte Count; D018450:Disease Progression; D015658:HIV Infections / Q000188:drug therapy*; D006304:Health Status; D006801:Humans; D018579:Patient Selection; D012720:Severity of Illness Index; D016896:Treatment Outcome; D019562:Viral Load
chemical_list: D019380:Anti-HIV Agents
keywords: advanced disease; antiretroviral therapy; cuidados diferenciados; differentiated care; enfermedad avanzada; maladie avancée; pacientes estables; patients stables; prise en charge différenciée; stable patients; terapia antirretroviral; traitement antirétroviral