Abstract
Background: The utility of self-report measures of physical activity (PA) in youth can be greatly enhanced by calibrating self-report output against objectively measured PA data.This study demonstrates the potential of calibrating self-report output against objectively measured physical activity (PA) in youth by using a commonly used self-report tool called the Physical Activity Questionnaire (PAQ). Methods. A total of 148 participants (grades 4 through 12) from 9 schools (during the 2009-2010 school year) wore an Actigraph accelerometer for 7 days and then completed the PAQ. Multiple linear regression modeling was used on 70% of the available sample to develop a calibration equation and this was cross validated on an independent sample of participants (30% of sample). Results: A calibration model with age, gender, and PAQ scores explained 40% of the variance in values for the percentage of time in moderate-to-vigorous PA (%MVPA) measured from the accelerometers (%MVPA = 14.56 - (sex*0.98) - (0.84*age) + (1.01*PAQ)). When tested on an independent, hold-out sample, the model estimated %MVPA values that were highly correlated with the recorded accelerometer values (r =.63) and there was no significant difference between the estimated and recorded activity values (mean diff. = 25.3 ± 18.1 min; p =.17). Conclusions: These results suggest that the calibrated PAQ may be a valid alternative tool to activity monitoring instruments for estimating %MVPA in groups of youth.
| Original language | English (US) |
|---|---|
| Article number | 461 |
| Journal | BMC Public Health |
| Volume | 14 |
| Issue number | 1 |
| DOIs | |
| State | Published - May 16 2014 |
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Keywords
- Accelerometry
- Measurement
- Public health
- Youth
ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health
Cite this
Calibration of self-report tools for physical activity research : The Physical Activity Questionnaire (PAQ). / Saint-Maurice, Pedro F.; Welk, Gregory J.; Beyler, Nicholas K.; Bartee, Roderick T.; Heelan, Kate A.
In: BMC Public Health, Vol. 14, No. 1, 461, 16.05.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Calibration of self-report tools for physical activity research
T2 - The Physical Activity Questionnaire (PAQ)
AU - Saint-Maurice, Pedro F.
AU - Welk, Gregory J.
AU - Beyler, Nicholas K.
AU - Bartee, Roderick T.
AU - Heelan, Kate A.
PY - 2014/5/16
Y1 - 2014/5/16
N2 - Background: The utility of self-report measures of physical activity (PA) in youth can be greatly enhanced by calibrating self-report output against objectively measured PA data.This study demonstrates the potential of calibrating self-report output against objectively measured physical activity (PA) in youth by using a commonly used self-report tool called the Physical Activity Questionnaire (PAQ). Methods. A total of 148 participants (grades 4 through 12) from 9 schools (during the 2009-2010 school year) wore an Actigraph accelerometer for 7 days and then completed the PAQ. Multiple linear regression modeling was used on 70% of the available sample to develop a calibration equation and this was cross validated on an independent sample of participants (30% of sample). Results: A calibration model with age, gender, and PAQ scores explained 40% of the variance in values for the percentage of time in moderate-to-vigorous PA (%MVPA) measured from the accelerometers (%MVPA = 14.56 - (sex*0.98) - (0.84*age) + (1.01*PAQ)). When tested on an independent, hold-out sample, the model estimated %MVPA values that were highly correlated with the recorded accelerometer values (r =.63) and there was no significant difference between the estimated and recorded activity values (mean diff. = 25.3 ± 18.1 min; p =.17). Conclusions: These results suggest that the calibrated PAQ may be a valid alternative tool to activity monitoring instruments for estimating %MVPA in groups of youth.
AB - Background: The utility of self-report measures of physical activity (PA) in youth can be greatly enhanced by calibrating self-report output against objectively measured PA data.This study demonstrates the potential of calibrating self-report output against objectively measured physical activity (PA) in youth by using a commonly used self-report tool called the Physical Activity Questionnaire (PAQ). Methods. A total of 148 participants (grades 4 through 12) from 9 schools (during the 2009-2010 school year) wore an Actigraph accelerometer for 7 days and then completed the PAQ. Multiple linear regression modeling was used on 70% of the available sample to develop a calibration equation and this was cross validated on an independent sample of participants (30% of sample). Results: A calibration model with age, gender, and PAQ scores explained 40% of the variance in values for the percentage of time in moderate-to-vigorous PA (%MVPA) measured from the accelerometers (%MVPA = 14.56 - (sex*0.98) - (0.84*age) + (1.01*PAQ)). When tested on an independent, hold-out sample, the model estimated %MVPA values that were highly correlated with the recorded accelerometer values (r =.63) and there was no significant difference between the estimated and recorded activity values (mean diff. = 25.3 ± 18.1 min; p =.17). Conclusions: These results suggest that the calibrated PAQ may be a valid alternative tool to activity monitoring instruments for estimating %MVPA in groups of youth.
KW - Accelerometry
KW - Measurement
KW - Public health
KW - Youth
UR - http://www.scopus.com/inward/record.url?scp=84902520283&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84902520283&partnerID=8YFLogxK
U2 - 10.1186/1471-2458-14-461
DO - 10.1186/1471-2458-14-461
M3 - Article
C2 - 24886625
AN - SCOPUS:84902520283
VL - 14
JO - BMC Public Health
JF - BMC Public Health
SN - 1471-2458
IS - 1
M1 - 461
ER -