title: Extreme obesity: sociodemographic, familial and behavioural correlates in The Netherlands.
abstract: OBJECTIVE
  To investigate the relationship between sociodemographic, behavioural, and family characteristics and the body mass index (BMI) (weight (kg)/height (m2)) of extremely obese people.
  
  
  METHODS
  Self reported sociodemographic, behavioural, and familial characteristics and weight and height were obtained by postal questionnaire.
  
  
  METHODS
  Adult, obese Dutch people who, on their own initiative, contacted our hospital for information on obesity treatment were sent a questionnaire. A total of 244 of 690 subjects had returned the questionnaire within the stated period of 80 days. Due to missing data 19 subjects could not be included in this analysis, leaving 191 women and 34 men.
  
  
  RESULTS
  In women the BMI seemed to be significantly inversely associated with the level of education of the partner, the number of cups of coffee consumed, and number of cigarettes smoked a day. In addition, the BMI of women was positively related to BMI of their mothers. Together these variables explained 18.0% of the total variation in BMI. In men none of the selected variables was associated with their BMI.
  
  
  CONCLUSIONS
  As the selected variables explained almost one fifth of the total variation in BMI, the impact of sociodemographic, familial, and behavioural factors should have more recognition in strategies aimed at reducing obesity.
authors.affiliation: Department of Gastroenterology, Academic Medical Center, University of Amsterdam, The Netherlands.
authors.forename: M P
authors.initials: MP
authors.lastname: Merkus
authors.forename: L M
authors.initials: LM
authors.lastname: Mathus-Vliegen
authors.forename: C
authors.initials: C
authors.lastname: Broekhoff
authors.forename: A M
authors.initials: AM
authors.lastname: Heijnen
mesh_terms: D000328:Adult; D000428:Alcohol Drinking / Q000453:epidemiology; D015992:Body Mass Index; D003069:Coffee; D004522:Educational Status; D005190:Family; D005260:Female; D006801:Humans; D008297:Male; D009426:Netherlands / Q000453:epidemiology; D009765:Obesity / Q000453:epidemiology*; D015995:Prevalence; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology; D012923:Social Class; D018709:Statistics, Nonparametric
chemical_list: D003069:Coffee