title: [Trend analysis of acquired syphilis in Mexico from 2003 to 2013].
abstract: OBJECTIVE
  To identify the population group in which syphilis increase was concentrated.
  
  
  METHODS
  The information was collected from the Mexico health statistical yearbooks. The information disaggregated by sex, age group and state during the period 2003 to 2013 was used to form different databases. Linear regression analysis with confidence interval at 95% was used to evaluate changes over time in different population groups.
  
  
  RESULTS
  An increase of 0.67 cases per 100,000 population (95%CI 0.30-1.04) in men was detected from 2010. The increase was concentrated in each group of 20-24 and 25-44. The highest incidence of acquired syphilis was reported in the last two years: 2012 and 2013. The last year reported a 1.85 times higher incidence than reported in 2003. Aguascalientes, Distrito Federal, Durango, Mexico, Oaxaca, Puebla, Quintana Roo, Yucatan and Zacatecas reported that syphilis increased during the study period.
  
  
  CONCLUSIONS
  Acquired syphilis may be reemerging in our country among young men; this increase is not uniform across the country, it is necessary to focus intervention measures for this sexually transmitted infection.
authors.affiliation: Centro de Investigación sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Antonia
authors.initials: A
authors.lastname: Herrera-Ortiz
authors.affiliation: El Colegio de la Frontera Norte, Tijuana, Baja California, México.
authors.forename: Felipe J
authors.initials: FJ
authors.lastname: Uribe-Salas
authors.affiliation: Centro de Investigación sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Ma Leonidez
authors.initials: ML
authors.lastname: Olamendi-Portugal
authors.affiliation: Centro de Investigación sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Santa
authors.initials: S
authors.lastname: García-Cisneros
authors.affiliation: Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Carlos Jesús
authors.initials: CJ
authors.lastname: Conde-Glez
authors.affiliation: Centro de Investigación sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Sánchez-Alemán
mesh_terms: D000328:Adult; D017677:Age Distribution; D017714:Community-Acquired Infections / Q000453:epidemiology; D016208:Databases, Factual; D005260:Female; D062306:Geography, Medical; D006801:Humans; D016014:Linear Models; D008297:Male; D008800:Mexico / Q000453:epidemiology; D009017:Morbidity / Q000639:trends; D017678:Sex Distribution; D013587:Syphilis / Q000453:epidemiology*; D055815:Young Adult