title: [Differences in the use of family planning methods by adolescent females according to the education model utilized during pregnancy. Monterrey, Mexico].
abstract: BACKGROUND
  The objective was to compare the use of family planning methods during the immediate postpartum period and two years following childbirth among the adolescent females who had followed two different intervention programs during their pregnancies.
  
  
  METHODS
  A quasi-experimental study was designed. A total of 62 pregnant adolescents were selected to comprised two intervention groups, the PRECEDE model and the Health Belief model (MCS) groups. Non-parametric statistical tests were employed and 95% confidence intervals estimated.
  
  
  RESULTS
  The average starting knowledge in the MCS groups was 69.12 points (95% CI 63.27-74.97) and ending 89.71 points (95% CI 86.24-93.17), while the starting knowledge for the PRECEDE group was 49.39 points (95% Cl 42.24-56.54) and ending 75.25 points (95% CI 71.12-79.38). IN the immediate postpartum, 93% (95% CI 83.5-100) of the adolescents in the PRECED group accepted the use of a family planning method similar to that employed by the MCS group, of 94.2 (95% CI 86.3-100). As regards the continued use of the method, that is, two years later, the PRECEDE strategy had a greater effect that the MCS strategy, respectively 92% (95% Cl 82-100) and 72% (95% CI 56.9-87.1).
  
  
  CONCLUSIONS
  A difference was found to exist between models as regards the use of family planning methods 2 years following childbirth. The PRECEDE program is proposed as the education strategy for preventing a second pregnancy among adolescent females.
authors.affiliation: Unidad de Investigación Epidemiológica y en Servicios de Salud, Instituto Mexicano del Seguro Social Monterrey, México. gmnunezr@cis.gob.mx
authors.forename: Georgina Mayela
authors.initials: GM
authors.lastname: Núñez Rocha
authors.forename: María de Jesús
authors.initials: Mde J
authors.lastname: Alanís Alanís
authors.forename: Jorge
authors.initials: J
authors.lastname: Alanís Salazar
authors.forename: Ana María
authors.initials: AM
authors.lastname: Salinas Martínez
authors.forename: M E
authors.initials: ME
authors.lastname: Garza Elizondo
authors.forename: Enrique
authors.initials: E
authors.lastname: Villarreal Ríos
mesh_terms: D000293:Adolescent; D000328:Adult; D016001:Confidence Intervals; D005193:Family Planning Services / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008800:Mexico; D049590:Postpartum Period; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D012959:Socioeconomic Factors; D018709:Statistics, Nonparametric; D013997:Time Factors