title: Physical activity and sedentary activity patterns among children and adolescents: a latent class analysis approach.
abstract: BACKGROUND
  While much is known about the overall levels of physical activity and sedentary activity among youth, few studies have attempted to define clusters of such behaviors. The purpose of this study was to identify and describe unique classes of youth based on their participation in a variety of physical activity and sedentary behaviors.
  
  
  METHODS
  Latent class analysis was used to characterize segments of youth based on patterns of self-reported and accelerometer-measured participation in 12 behaviors. Children and adolescents (N=720) from 6th-11th grade were included in the analysis. Differences in class membership were examined using multinomial logistic regression.
  
  
  RESULTS
  Three distinct classes emerged for boys and girls. Among boys, the 3 classes were characterized as "Active" (42.1%), "Sedentary" (24.9%), and "Low Media/Moderate Activity" (33.0%). For girls, classes were "Active" (18.7%), "Sedentary" (47.6%), and "Low Media/Functional Activity" (33.7%). Significant differences were found between the classes for a number of demographic indicators including the proportion in each class who were classified as overweight or obese.
  
  
  CONCLUSIONS
  The behavioral profiles of the classes identified in this study can be used to suggest possible audience segments for intervention and to tailor strategies appropriately.
authors: Center for Health Research, Kaiser Permanente, Portland, OR, USA.
authors: Carrie D
authors: CD
authors: Patnode
authors: Leslie A
authors: LA
authors: Lytle
authors: Darin J
authors: DJ
authors: Erickson
authors: John R
authors: JR
authors: Sirard
authors: Daheia J
authors: DJ
authors: Barr-Anderson
authors: Mary
authors: M
authors: Story
references: Psychol Med. 2007 Aug;37(8):1097-107
references: 17472759
references: JAMA. 2008 Jul 16;300(3):295-305
references: 18632544
references: J Pediatr. 2005 Jun;146(6):732-7
references: 15973308
references: J Behav Med. 2007 Dec;30(6):521-31
references: 17712619
references: Drug Alcohol Depend. 2006 Jul 27;83(3):199-209
references: 16359829
references: Med Sci Sports Exerc. 1998 Apr;30(4):629-33
references: 9565947
references: Drug Alcohol Depend. 2007 Feb 23;87(1):83-93
references: 16959436
references: Med Sci Sports Exerc. 2008 Apr;40(4):630-8
references: 18317384
references: Med Sci Sports Exerc. 2005 Nov;37(11 Suppl):S523-30
references: 16294115
references: Int J Obes Relat Metab Disord. 2004 Oct;28(10):1238-46
references: 15314635
references: Acta Paediatr. 2008 May;97(5):647-52
references: 18394111
references: Med Sci Sports Exerc. 1993 Jan;25(1):99-108
references: 8423762
references: Public Health Nutr. 2006 Apr;9(2):204-11
references: 16571174
references: Arch Pediatr Adolesc Med. 1999 Apr;153(4):409-18
references: 10201726
references: Pediatrics. 2001 Feb;107(2):423-6
references: 11158483
references: J Adolesc Health. 2008 Apr;42(4):369-77
references: 18346662
references: JAMA. 1998 Mar 25;279(12):938-42
references: 9544768
references: J Phys Act Health. 2009 Mar;6(2):144-52
references: 19420391
references: Am J Prev Med. 2005 Apr;28(3):259-66
references: 15766613
references: Med Sci Sports Exerc. 2008 Jan;40(1):181-8
references: 18091006
references: Am J Med. 1998 Aug;105(2):145-50
references: 9727822
references: Ann Behav Med. 2007 Feb;33(1):80-9
references: 17291173
references: Health Psychol. 2007 Jan;26(1):113-20
references: 17209704
references: Arch Pediatr Adolesc Med. 1996 Apr;150(4):356-62
references: 8634729
references: Addiction. 2007 Aug;102(8):1310-9
references: 17624981
references: Arch Pediatr Adolesc Med. 2003 Aug;157(8):797-802
references: 12912786
references: Am J Community Psychol. 2009 Dec;44(3-4):338-49
references: 19838791
references: J Health Commun. 1996 Jul-Sep;1(3):267-83
references: 10947364
references: Struct Equ Modeling. 2007;14(4):671-694
references: 19953201
references: Prev Med. 2007 Dec;45(6):442-6
references: 17719080
references: J Am Diet Assoc. 2003 Oct;103(10):1298-305
references: 14520247
references: Pediatrics. 2007 Dec;120 Suppl 4:S164-92
references: 18055651
references: Med Sci Sports Exerc. 2000 Sep;32(9):1610-6
references: 10994913
references: Addiction. 2007 Jan;102(1):94-104
references: 17207127
references: Am J Prev Med. 1999 Apr;16(3):222-9
references: 10198662
references: Pediatrics. 1993 Feb;91(2):499-501
references: 8424034