title: Patterns of noncompliance in adolescent field-based accelerometer research.
abstract: BACKGROUND
  The primary purpose of this study was to investigate patterns of noncompliance in an adolescent field based accelerometer study. A further purpose was to investigate the effect of a cost efficient strategy (SMS reminder message) on the compliance of adolescents
  
  
  METHODS
  The research carried out in 2010 involved 117 second level students (12.41 ± .53 yrs) from 4 schools in a rural Irish town. The Actigraph accelerometer data were processed over 7 days to determine compliance level.
  
  
  RESULTS
  Students were more likely to remove their monitor in the evening period than at any other time, however if students removed their monitor after school it remained unworn for a significantly longer duration than in any other time period. Students who received a SMS message were significantly more likely (P = .008) to wear their monitor in the morning than those that did not.
  
  
  CONCLUSIONS
  Sending an SMS message each morning is effective for improving the number of students wearing monitors to school. The after school period is a critical period for nonwear time and should be targeted in future studies wishing to improve compliance.
authors.affiliation: School of Health and Human Performance, Dublin City University, Dublin, Ireland.
authors.forename: Sarahjane
authors.initials: S
authors.lastname: Belton
authors.forename: Wesley
authors.initials: W
authors.lastname: O'Brien
authors.forename: Eric E
authors.initials: EE
authors.lastname: Wickel
authors.forename: Johann
authors.initials: J
authors.lastname: Issartel
mesh_terms: D061725:Accelerometry; D056044:Actigraphy; D000293:Adolescent; D000704:Analysis of Variance; D015331:Cohort Studies; D015444:Exercise; D005260:Female; D006801:Humans; D007494:Ireland; D008297:Male; D009043:Motor Activity; D010349:Patient Compliance; D017010:Reminder Systems; D012424:Rural Population; D012574:Schools; D013334:Students / Q000523:psychology*; D013997:Time Factors