TABLE 3.
Regression Models: Sleep Duration, Weekend Oversleep, and Daytime Sleepiness
| Variable | Sleep Duration | Weekend Oversleep | Daytime Sleepiness | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
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| B | 95% CI | t | η2 | B | 95% CI | t | η2 | B | 95% CI | t | η2 | |
| Univariate models | ||||||||||||
| Gender (male) | −33.51 | (−58.01, −9.01) | −2.70* | 0.04 | −20.01 | (−45.76, −5.74) | −1.53 | 0.00 | −0.25 | (−1.83, 1.33) | −0.31 | 0.00 |
| Age | 0.06 | (−1.49, 1.62) | 0.08 | 0.00 | −0.69 | (−2.27, 0.89) | −0.86 | 0.00 | 0.01 | (−0.08, 0.11) | 0.25 | 0.00 |
| Ethnicity (Caucasian) | −13.01 | (−34.06, 8.03) | −1.22 | 0.00 | 21.68 | (0.27, 43.11) | 1.99 | 0.01 | 0.00 | (−1.33, 1.33) | 0.01 | 0.00 |
| Employment status (employed) | 21.56 | (−3.53, 46.66) | 1.69 | 0.01 | −8.03 | (−34.09, 18.04) | −0.61 | 0.00 | −1.08 | (−2.67, 0.51) | −1.33 | 0.01 |
| Subjective SEP | 8.68 | (2.89, 14.47) | 2.96** | 0.05 | −8.05 | (−14.08, −2.02) | −2.64** | 0.04 | −0.67 | (−1.04, −0.30) | −3.57** | 0.07 |
| Household income (in $10k) | 3.22 | (1.04, 5.41) | 2.91** | 0.04 | −4.04 | (−6.28, −1.78) | −3.54** | 0.07 | −0.20 | (−0.35, −0.06) | −2.85** | 0.05 |
| Education (in years) | −0.25 | (−3.43, 2.94) | −0.16 | 0.00 | −1.29 | (−4.61, 2.02) | −0.77 | 0.00 | −0.06 | (−0.27, 0.15) | −0.58 | 0.00 |
| Paired SEP models (covariate: gender) | ||||||||||||
| Subjective SEP | 7.24 | (0.57, 13.91) | 2.14* | 0.03 | −2.73 | (−9.70, 4.24) | −0.77 | 0.00 | −0.52 | (−0.95, −0.09) | −2.37* | 0.03 |
| Household income (in $10k) | 1.89 | (−0.59, 4.38) | 1.50 | 0.01 | −3.38 | (−5.99, −0.77) | −2.56** | 0.04 | −0.10 | (−0.27, 0.05) | −1.34 | 0.01 |
| Adjusted R2 = 0.09, F = 6.69** | Adjusted R2 = 0.06, F = 4.81** | Adjusted R2 = 0.06, F = 4.65** | ||||||||||
| Subjective SEP | 9.35 | (3.38, 15.33) | 3.09** | 0.05 | −7.55 | (−13.80, −1.29) | −2.38** | 0.03 | −0.69 | (−1.06, 0.30) | −3.53* | 0.07 |
| Education (in years) | −1.48 | (−4.69, 1.73) | −0.91 | 0.01 | −0.31 | (−3.67, 3.05) | −0.85 | 0.00 | 0.30 | (−0.18, 0.23) | 0.28 | 0.00 |
| Adjusted R2 = 0.08, F = 5.73** | Adjusted R2 = 0.03, F = 2.90* | Adjusted R2 = 0.05, F = 4.30** | ||||||||||
| Post hoc models (covariates: gender, mental health, & stress) | ||||||||||||
| Subjective SEP | 7.52 | (0.79, 14.25) | 2.21* | 0.03 | −0.95 | (−7.76, 5.86) | −0.28 | 0.00 | −0.41 | (−0.82, 0.00) | −1.95* | 0.02 |
| Household income (in $10k) | 1.38 | (−0.67, 3.44) | 1.33 | 0.01 | −2.70 | (−4.79, −0.61) | −2.55** | 0.04 | −0.08 | (−0.21, 0.05) | −1.28 | 0.01 |
| Adjusted R2 = 0.08, F = 4.84** | Adjusted R2 = 0.12, F = 5.45** | Adjusted R2 = 0.13, F = 7.22** | ||||||||||
| Subjective SEP | 9.06 | (2.94, 15.19) | 2.92** | 0.05 | −5.66 | (−11.90, 0.59) | −1.79*** | 0.02 | −0.60 | (−0.98, −0.23) | −3.18** | 0.06 |
| Education (in years) | −1.57 | (−4.86, 1.73) | −0.94 | 0.01 | −0.34 | (−3.71, 3.02) | −0.20 | 0.00 | 0.09 | (−0.11, 0.29) | 0.88 | 0.01 |
| Adjusted R2 = 0.07, F = 4.34** | Adjusted R2 = 0.08, F = 4.54** | Adjusted R2 = 0.12, F = 6.71** | ||||||||||
Note. N = 177. Univariate models include each variable entered singularly. Paired models include both variables simultaneously, with covariates indicated (covariate B coefficients not shown). Models are consistent when age, ethnicity, and employment status are also included as covariates (results not shown). CI = confidence interval; SEP = socioeconomic position. Bolded values indicate statistical significance.
*
p < :05.
**
p < :01.
***
p < :08.