title: Assessment of Physical Activity by Accelerometer and IPAQ-Short Version in Patients with Chronic Kidney Disease Undergoing Hemodialysis.
abstract: OBJECTIVE
  To compare the short version of International Physical Activity Questionnaire (IPAQ) and the accelerometer measurement of physical activity (PA) in patients undergoing hemodialysis.
  
  
  METHODS
  Sample consisted of 40 patients (19 men) aged 45 ± 16 years. Patients reported their PA using the IPAQ during a face-to-face interview, and wore an Actigraph GT3-X accelerometer for 1 week to obtain minutes per day of light PA, moderate-to-vigorous PA (MVPA) and total PA as well as raw counts per day (vector magnitude).
  
  
  RESULTS
  All PA-related variables were significantly correlated among instruments (r = 0.34-0.47) when analyzed as a group. However, when analyzed separately by gender, the relationships were present for women only (r = 0.46-0.62). IPAQ significantly underestimated light PA (IPAQ vs. accelerometer: 180.0 vs. 251.1 min/day, p = 0.019), but no differences were found between methods for MVPA and total PA.
  
  
  CONCLUSIONS
  Modest correlations were found between self-reported PA time by IPAQ (short version) and accelerometer, but only in women. However, the IPAQ may underestimate light PA, which is the main form of PA in this population.
authors.affiliation: UNESP, Rio Claro, Bauru, Brazil.
authors.forename: Clara Suemi da Costa
authors.initials: CS
authors.lastname: Rosa
authors.forename: Luis
authors.initials: L
authors.lastname: Gracia-Marco
authors.forename: Alan R
authors.initials: AR
authors.lastname: Barker
authors.forename: Ismael Forte
authors.initials: IF
authors.lastname: Freitas
authors.forename: Henrique Luiz
authors.initials: HL
authors.lastname: Monteiro
mesh_terms: D061725:Accelerometry; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D006435:Renal Dialysis; D051436:Renal Insufficiency, Chronic / Q000473:pathology / Q000534:rehabilitation* / Q000628:therapy*; D057566:Self Report; D012737:Sex Factors; D011795:Surveys and Questionnaires