Table 4.
Associations between self-reported sleep and age in Lifebrain
| Sleep scale | Variables | edf/estimate | F/t | p |
|---|---|---|---|---|
| Quality | Age | 2.23 | 3.96 | .008 |
| Sex | −0.07 | −2.65 | .008 | |
| Latency | Age | 2.87 | 4.15 | .004 |
| Sex | −0.26 | −7.71 | 1.8e−14 | |
| Duration | Age | 4.15 | 9.00 | 1.1e−08 |
| Sex | −0.06 | −2.24 | .025 | |
| Efficiency | Age | 2.67 | 27.67 | <2e−16 |
| Sex | −0.17 | −4.89 | 1.1e−06 | |
| Problems | Age | 1.0 | 17.59 | 2.8e−05 |
| Sex | −0.04 | −2.58 | .01 | |
| Medication | Age | 1.02 | 79.78 | <2e−16 |
| Sex | −0.11 | −3.85 | .0001 | |
| Tiredness | Age | 4.13 | 13.99 | 9.4e−14 |
| Sex | −0.01 | −0.37 | .71 | |
| Global | Age | 2.59 | 7.74 | 2.6e−05 |
| Sex | −0.76 | −6.63 | 4.0e−11 |
GAMs are presented for each sleep variable, testing a smooth function of age and a linear function of sex. Study was included as a random effect term of no interest. effective degrees of freedom (edf) and F-values are provided for age, whereas the linear estimate and the t-values are provided for sex. Negative estimates/t-values indicate lower scores for men, that is, less sleep problems. Only cross-sectional data were included in these analyses.