title: Mother-reported sleep, accelerometer-estimated sleep and weight status in Mexican American children: sleep duration is associated with increased adiposity and risk for overweight/obese status.
abstract: We know of no studies comparing parent-reported sleep with accelerometer-estimated sleep in their relation to paediatric adiposity. We examined: (i) the reliability of mother-reported sleep compared with accelerometer-estimated sleep; and (ii) the relationship between both sleep measures and child adiposity. The current cross-sectional study included 303 Mexican American mother-child pairs recruited from Kaiser Permanente Northern California. We measured sleep duration using maternal report and accelerometry and child anthropometrics. Concordance between sleep measures was evaluated using the Bland-Altman method. We conducted zero-ordered correlations between mother-reported sleep, accelerometer-estimated sleep and child BMI z-scores (BMIz). Using linear regression, we examined three models to assess child BMIz with mother-reported sleep (model 1), accelerometer-estimated sleep (model 2) and both sleep measures (model 3). Children had an average age of 8.86 years (SD = 0.82). Mothers reported that their child slept 9.81 ± 0.74 h [95% confidence interval (CI): 9.72, 9.89], compared to 9.58 ± 0.71 h (95% CI: 9.50, 9.66) based on accelerometry. Mother-reported sleep and accelerometer-estimated sleep were correlated (r = 0.33, P < 0.001). BMIz outcomes were associated negatively with mother-reported sleep duration (model 1: β = -0.13; P = 0.02) and accelerometer-estimated sleep duration (model 2: β = -0.17; P < 0.01). Accounting for both sleep measures, only accelerometer-measured sleep was related to BMIz (model 3: β = -0.14, P = 0.02). Each sleep measure was related significantly to adiposity, independent of covariates. Accelerometry appeared to be a more reliable measure of children's sleep than maternal report, yet maternal report may be sufficient to examine the sleep-adiposity relationship when resources are limited.
authors: Division of General Pediatrics, University of California at San Francisco, San Francisco, CA, USA.
authors: Suzanna M
authors: SM
authors: Martinez
authors: Louise C
authors: LC
authors: Greenspan
authors: Nancy F
authors: NF
authors: Butte
authors: Steven E
authors: SE
authors: Gregorich
authors: Cynthia L
authors: CL
authors: De Groat
authors: Julianna
authors: J
authors: Deardorff
authors: Carlos
authors: C
authors: Penilla
authors: Lauri A
authors: LA
authors: Pasch
authors: Elena
authors: E
authors: Flores
authors: Jeanne M
authors: JM
authors: Tschann
mesh_terms: D061725:Accelerometry; D050154:Adiposity / Q000208:ethnology / Q000502:physiology*; D015992:Body Mass Index; D001835:Body Weight; D002140:California; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D017058:Mexican Americans; D009035:Mothers; D009765:Obesity / Q000208:ethnology / Q000503:physiopathology*; D050177:Overweight / Q000208:ethnology / Q000503:physiopathology*; D015203:Reproducibility of Results; D012307:Risk Factors; D012890:Sleep / Q000502:physiology*; D013997:Time Factors
keywords: Mexican American; paediatric obesity; parent report; reliability; sleep measurement