title: Co-occurrence of leading lifestyle-related chronic conditions among adults in the United States, 2002-2009.
abstract: BACKGROUND
  Public health and clinical strategies for meeting the emerging challenges of multiple chronic conditions must address the high prevalence of lifestyle-related causes. Our objective was to assess prevalence and trends in the chronic conditions that are leading causes of disease and death among adults in the United States that are amenable to preventive lifestyle interventions.
  
  
  METHODS
  We used self-reported data from 196,240 adults aged 25 years or older who participated in the National Health Interview Surveys from 2002 to 2009. We included data on cardiovascular disease (coronary heart disease, angina pectoris, heart attack, and stroke), cancer, chronic obstructive pulmonary disease (emphysema and chronic bronchitis), diabetes, and arthritis.
  
  
  RESULTS
  In 2002, an unadjusted 63.6% of participants did not have any of the 5 chronic conditions we assessed; 23.9% had 1, 9.0% had 2, 2.9% had 3, and 0.7% had 4 or 5. By 2009, the distribution of co-occurrence of the 5 chronic conditions had shifted subtly but significantly. From 2002 to 2009, the age-adjusted percentage with 2 or more chronic conditions increased from 12.7% to 14.7% (P < .001), and the number of adults with 2 or more conditions increased from approximately 23.4 million to 30.9 million.
  
  
  CONCLUSIONS
  The prevalence of having 1 or more or 2 or more of the leading lifestyle-related chronic conditions increased steadily from 2002 to 2009. If these increases continue, particularly among younger adults, managing patients with multiple chronic conditions in the aging population will continue to challenge public health and clinical practice.
authors.affiliation: Centers for Disease Control and Prevention, 4770 Buford Hwy, MS K67, Atlanta, GA 30341, USA. eford@cdc.gov
authors.forename: Earl S
authors.initials: ES
authors.lastname: Ford
authors.forename: Janet B
authors.initials: JB
authors.lastname: Croft
authors.forename: Samuel F
authors.initials: SF
authors.lastname: Posner
authors.forename: Richard A
authors.initials: RA
authors.lastname: Goodman
authors.forename: Wayne H
authors.initials: WH
authors.lastname: Giles
mesh_terms: D000328:Adult; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000523:psychology; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D033182:Intention; D012944:Social Support