Validity of Family Child Care Providers' Proxy Reports on Children's Physical Activity

Background: Interventions to promote physical activity (PA) in children attending family child care homes (FCCHs) require valid, yet practical, measurement tools. The aim of this study was to assess the validity of two proxy report instruments designed to measure PA in children attending FCCHs. Methods: A sample of 37 FCCH providers completed the Burdette parent proxy report, modified for the family child care setting for 107 children 3.4 +/- 1.2 years of age. A second sample of 42 FCCH providers completed the Harro parent and teacher proxy report, modified for the family child care setting, for 131 children 3.8 +/- 1.3 years of age. Both proxy reports were assessed for validity using accelerometry as a criterion measure. Results: Significant positive correlations were observed between provider-reported PA scores from the modified Burdette proxy report and objectively measured total PA (r = 0.30; p < 0.01) and moderate-to-vigorous PA (MVPA; r = 0.34; p < 0.01). Across levels of provider-reported PA, both total PA and MVPA increased significantly in a linear dose-response fashion. The modified Harro proxy report was not associated with objectively measured PA. Conclusion: Proxy PA reports completed by family child care providers may be a valid assessment option in studies where more burdensome objective measures are not feasible.