. Author manuscript; available in PMC: 2009 Mar 4.

Published in final edited form as: Arch Pediatr Adolesc Med. 2008 Apr;162(4):305–311. doi: 10.1001/archpedi.162.4.305

Table 4.

Multivariate-Adjusted Interval Change in Weight-for-Length z Score Associated With Change in Sleep Duration From Ages 6 Months to 3 Years^a

Model	Change in Weight-for-Length z Score per Sleep Decrement of 1 h/d, β (95% CI)^b
Model 1, unadjusted	0.05 (0.02−0.07)
Model 2, model 1 + maternal education, income, prepregnancy BMI, marital status, prenatal smoking history, and breastfeeding duration and child's race/ethnicity and change in television viewing	0.05 (0.02−0.07)
Model 3, model 2 + child's birth weight and baseline weight-for-length z score	0.02 (0.003−0.05)

Abbreviations: BMI, body mass index (calculated as the weight in kilograms divided by the height in meters squared); CI, confidence interval.

The longitudinal data are from 1045 mother-infant pairs (2250 observations) from Project Viva.

Multivariate models combine associations of change in sleep duration from ages 6 months to 1 year with change in weight-for-length z score from ages 6 months to 1 year, change in sleep duration from ages 1 to 2 years with change in weight-for-length z score from ages 1 to 2 years, and change in sleep duration from ages 2 to 3 years with change in weight-for-length z score from ages 2 to 3 years.