title: [The brachial and cephalic perimeters as indicators of poverty and acute diarrhea in children under five years in Bogotá].
abstract: OBJECTIVE
  To assess the relationship between nutritional status and some factors related with poverty (acute diarrhea and overcrowding) in children less than 6 years of age in Bogotá.
  
  
  METHODS
  A community-based, cross-sectional study, was conducted during 2000 in the urban area of Bogotá, using a household interview survey. 3081 adults having in their homes children under five years were interviewed. This number of participants was calculated to obtain a representative sample of the city for estimating a binomial population parameter. A multistage sampling was carried out. The sample size was reduced to 2833 with the elimination of cases missing scores on dependent variables (DVs). Cephalic and brachial perimeters (continuous variables), used as a proxy of nutritional status (DVs), were selected as the main outcome measures. A 2 x 2 x 2 multivariate analysis of variance was performed on two DVs. Independent variables were overcrowding (as a measure of marginalization) and recent acute diarrhea. The analyses included sequential adjustment for nonorthogonality.
  
  
  RESULTS
  DVs showed a low correlation (r=0.3) and a symmetric distribution. Evaluation of assumptions of linearity and multicollinearity were satisfactory. The omnibus test, using Wilk's criterion, showed that combined DVs were significantly affected by recent acute diarrhea (F=9.65 p=0.000), age less than 1 year (F=350.81 p=0.000) and the interaction acute diarrhea x overcrowding (F=6.25 p=0.000). In order to evaluate the impact of each main effect on the individual DVs, a Roy-Bargmann stepdown analysis was carried out. Homogeneity of regression was achieved for all components of the stepdown analysis. The brachial perimeter has a unique contribution to predict recent acute diarrhea (Roy-Bargmann F(1,1)=13.1 p=0.000). The cephalic perimeter has a unique contribution to predict acute diarrhea and overcrowding (Roy-Bargmann F(1,1)=10.22 p=0.001).
  
  
  CONCLUSIONS
  Recent acute diarrhea and overcrowding are related with poor nutritional status. Brachial and cephalic perimeters could be attractive indicators of different varieties of nutritional deficiency.
authors.affiliation: Facultad de Medicina, Universidad Nacional de Colombia. rsanchezpe@unal.edu.co
authors.forename: Ricardo
authors.initials: R
authors.lastname: Sánchez
authors.forename: Jairo
authors.initials: J
authors.lastname: Echeverri
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Pardo
mesh_terms: D000886:Anthropometry; D002508:Cephalometry; D002675:Child, Preschool; D003105:Colombia / Q000453:epidemiology; D003430:Cross-Sectional Studies; D003968:Diarrhea, Infantile / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D006305:Health Status Indicators; D006801:Humans; D007223:Infant; D008297:Male; D009752:Nutritional Status; D011203:Poverty; D011237:Predictive Value of Tests; D012959:Socioeconomic Factors
vernacular_title: Perímetros braquial y cefálico como indicadores de pobreza y enfermedad diarréica aguda en niños menores de 5 ańos, en Bogotá.