title: Factors associated with the failure of HIV-positive persons to return for scheduled medical visits.
abstract: OBJECTIVE
  To assess in an HIV-positive cohort the cumulative probability of failing to return for scheduled medical visits and to address the factors associated with follow-up discontinuation.
  
  
  METHODS
  This was a hospital-based cohort study conducted from January 1985 through September 1999. Out of 3,300 HIV-1 infected patients, 1,680 patients with CD4 count <500 cells/mL or with AIDS diagnosis were included in the analysis because they received scheduled medical visits for follow-up at our center. Baseline visit was the first visit when patients met the criteria for enrollment. The main outcome measure was failure to return for scheduled medical visits for at least 12 consecutive months.
  
  
  RESULTS
  The probability of returning decreased rapidly in the first months after the baseline visit. After 1 year since enrollment, 25% of patients failed to return and after 2 years 34% of patients failed to return. Most patients who failed to return for visits (78%) discontinued their follow-up within 6 months since enrollment. In multivariate analysis, patients in the intravenous drug use (IDU) category were most likely to fail to return for scheduled appointments, as were patients with higher CD4 count (CD4 >50 cells/microL) or patients without AIDS diagnosis. Patients with shorter follow-up had a higher risk of failing to return (odds ratio [OR]: 0.12, 0.36, 0.45, and 0.74 for >36, 24-36, 12-24, and 6-12 months of follow-up respectively vs. <6 months). Patients who were enrolled in more recent years had a higher compliance to follow-up visits (OR: 0.33, 0.63, and 0.61 for > or = 1997, 1995-1996, and 1988-1994 vs. <1988).
  
  
  CONCLUSIONS
  Patients in the IDU category, patients without AIDS diagnosis, or patients with higher CD4 counts are more likely to miss medical appointments and discontinue their follow-up. More recently enrolled patients have a lower risk of failing to return. It is possible that the recent and more effective anti-HIV treatment played a major role in increasing adherence to follow-up.
authors.affiliation: Unità Operativa di Malattie Infettive, Ospedali Riuniti di Bergamo, Largo Barozzi, Bergamo, Italy. aricirm@tin.it
authors.forename: Claudio
authors.initials: C
authors.lastname: Arici
authors.forename: Diego
authors.initials: D
authors.lastname: Ripamonti
authors.forename: Franco
authors.initials: F
authors.lastname: Maggiolo
authors.forename: Marco
authors.initials: M
authors.lastname: Rizzi
authors.forename: Maria Grazia
authors.initials: MG
authors.lastname: Finazzi
authors.forename: Patrizio
authors.initials: P
authors.lastname: Pezzotti
authors.forename: Fredy
authors.initials: F
authors.lastname: Suter
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001071:Appointments and Schedules; D015496:CD4-Positive T-Lymphocytes; D015331:Cohort Studies; D005260:Female; D015658:HIV Infections / Q000628:therapy*; D015497:HIV-1; D006801:Humans; D007558:Italy / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009819:Office Visits / Q000706:statistics & numerical data*; D010349:Patient Compliance / Q000706:statistics & numerical data*; D010352:Patient Dropouts / Q000706:statistics & numerical data*; D012307:Risk Factors; D015819:Substance Abuse, Intravenous; D013997:Time Factors