Table 4.
Estimation of Age Effects on Subjective Minus Objective Sleep Duration (Hours) for Weekdays Only, Using Linear Mixed Effects Model With Random Intercepts Accounting for Clustering by Household, With Proxy Status and Demographic Variables, Survey of the Health of Wisconsin, 2014–2017
| Proxy Reported | Self-Reported | |||||||
|---|---|---|---|---|---|---|---|---|
| Characteristic | Model 1 | Model 2 | Model 1 | Model 2 | ||||
| Estimate | 95% CI | Estimate | 95% CI | Estimate | 95% CI | Estimate | 95% CI | |
| Age | −0.06 | −0.1, 0.005 | −0.06 | −0.1, 0.004 | −0.1 | −0.2, 0.05 | −0.1 | −0.3, 0.04 |
| Sex | ||||||||
| Male | 0.1 | −0.1, 0.3 | 0.01 | −0.5, 0.5 | ||||
| Female | 0.00 | Referent | 0.00 | Referent | ||||
| Race/ethnicity | ||||||||
| White | 0.00 | Referent | 0.00 | Referent | ||||
| Black | −0.5 | −1.0, −0.1 | 1.0 | 0.2, 1.8 | ||||
| Hispanic | 0.2 | −0.5, 0.8 | −0.8 | −1.8, 0.2 | ||||
| Other | 0.07 | −0.4, 0.5 | −0.9 | −2.0, 0.2 | ||||
| Household income per person, per $1,000 | −0.002 | −0.01, 0.008 | 0.004 | −0.02, 0.02 | ||||
| Rural/urban status | ||||||||
| Rural | 0.00 | Referent | 0.00 | Referent | ||||
| Urban | −0.2 | −0.4, 0.1 | −0.4 | −1.0, 0.1 | ||||
| BMI percentile | 0.004 | −0.0005, 0.008 | 0.001 | −0.007, 0.01 | ||||
Abbreviations: BMI, body mass index; CI, confidence interval.