Table 2.
Associations between weekday and weekend sleep duration and overweight and obesity among adolescents (age 12–17, N = 1,254).
| Sleep duration, hours | p for Trend | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| < 7 | 7–8 | 8–9 | 9–10 | 10+ | |||||||
| Weekday | |||||||||||
| OR 95% CI |
OR 95% CI |
OR 95% CI |
OR 95% CI |
OR 95% CI |
|||||||
| Overall | |||||||||||
| Base model | 1.63 | (0.96, 2.77) | 1.06 | (0.73, 1.52) | Referent | 0.91 | (0.65, 1.27) | 0.72 | (0.46, 1.11) | 0.02 | |
| Model 2 | 1.73 | (1.00, 2.97) | 1.05 | (0.72, 1.53) | Referent | 0.94 | (0.67, 1.31) | 0.73 | (0.46, 1.17) | 0.03 | |
| Model 3 | 1.57 | (0.82, 3.01) | 0.94 | (0.61, 1.45) | Referent | 0.98 | (0.65, 1.46) | 0.59 | (0.32, 1.07) | 0.06 | |
| Females | |||||||||||
| Base model | 1.50 | (0.69, 3.29) | 1.17 | (0.69, 1.99) | Referent | 1.10 | (0.67, 1.78) | 0.90 | (0.48, 1.67) | 0.35 | |
| Model 2 | 1.81 | (0.80, 4.07) | 1.20 | (0.70, 2.07) | Referent | 1.11 | (0.68, 1.84) | 0.97 | (0.50, 1.86) | 0.34 | |
| Model 3 | 1.84 | (0.72, 4.70) | 1.02 | (0.52, 1.97) | Referent | 1.25 | (0.68, 2.31) | 0.98 | (0.42, 2.30) | 0.64 | |
| Males | |||||||||||
| Base Model | 1.69 | (0.81, 3.54) | 0.94 | (0.57, 1.57) | Referent | 0.77 | (0.49, 1.22) | 0.56 | (0.30, 1.06) | 0.02 | |
| Model 2 | 1.65 | (0.77, 3.52) | 0.94 | (0.56, 1.60) | Referent | 0.80 | (0.49, 1.27) | 0.54 | (0.27, 1.08) | 0.03 | |
| Model 3 | 1.60 | (0.71, 3.58) | 0.86 | (0.50, 1.48) | Referent | 0.76 | (0.46, 1.24) | 0.52 | (0.25, 1.06) | 0.04 | |
| Weekend | |||||||||||
| Overall | |||||||||||
| Base model | 1.35 | (0.65, 2.78) | 1.03 | (0.58, 1.84) | Referent | 0.93 | (0.62, 1.37) | 0.80 | (0.55, 1.15) | 0.06 | |
| Model 2 | 1.23 | (0.58, 2.58) | 1.08 | (0.60, 1.95) | Referent | 0.94 | (0.63, 1.41) | 0.78 | (0.54, 1.14) | 0.06 | |
| Model 3 | 1.03 | (0.38, 2.84) | 0.98 | (0.48, 1.99) | Referent | 0.91 | (0.56, 1.48) | 0.85 | (0.56, 1.33) | 0.03 | |
| Females | |||||||||||
| Base model | 1.90 | (0.57, 6.32) | 1.16 | (0.48, 2.81) | Referent | 1.05 | (0.55, 2.00) | 1.23 | (0.68, 2.21) | 0.94 | |
| Model 2 | 1.62 | (0.46, 5.69) | 1.13 | (0.45, 2.83) | Referent | 0.95 | (0.48, 1.86) | 1.07 | (0.58, 1.98) | 0.79 | |
| Model 3 | 1.60 | (0.28, 9.17) | 1.01 | (0.30, 3.36) | Referent | 1.01 | (0.44, 2.32) | 1.15 | (0.53, 2.50) | 0.71 | |
| Males | |||||||||||
| Base model | 1.18 | (0.47, 2.97) | 1.02 | (0.47, 2.25) | Referent | 0.90 | (0.54, 1.49) | 0.57 | (0.35, 0.93) | 0.01 | |
| Model 2 | 1.12 | (0.44, 2.89) | 1.09 | (0.48, 2.45) | Referent | 0.93 | (0.55, 1.56) | 0.56 | (0.34, 0.92) | 0.01 | |
| Model 3 | 1.03 | (0.38, 2.78) | 1.07 | (0.46, 2.48) | Referent | 0.92 | (0.53, 1.57) | 0.52 | (0.31, 0.88) | 0.01 | |
Weekday consists of sunday to thursday evenings. Weekend consists of Friday and saturday evenings.
Overweight-obese defined as body mass index > 85th percentile.
Base Model adjusted for sex (for overall analysis alone) and age.
Model 2: adjusted for covariates in base model and race, school type, parental marital status, home ownership, parental education.
Model 3: adjusted for covariates in Model 2 and moderate-vigorous physical activity (MVPA), teen sedentary time, teen frequency of beneficial foods eaten, teen frequency of detrimental foods eaten, and time spent watching television.
p-for-interaction between sex and sleep duration: 0.78 for weekday and 0.15 for weekend sleep duration.
OR Odds ratio, 95% CI 95% confidence interval.