Table 2 Results from the Multilevel Models Examining the Association between Daily Sleep Duration and Affect (N = 2,012; N_days = 14,811)

Fixed effects

Intercept

2.825

0.042

[2.743, 2.906]

< 0.001

0.163

0.014

[0.135, 0.191]

< 0.001

Daily sleep duration (linear)

0.024

0.004

[0.015, 0.032]

< 0.001

-0.012

0.002

[-0.017, -0.008]

< 0.001

Daily sleep duration (quadratic)

-0.009

0.001

[-0.011, -0.006]

< 0.001

0.004

0.001

[0.002, 0.005]

< 0.001

Daily sleep duration (cubic)

-0.001

0.000

[-0.002, -0.001]

< 0.001

0.001

0.000

[0.000, 0.001]

< 0.001

Depressed status

-0.421

0.051

[-0.522, -0.320]

< 0.001

0.194

0.018

[0.160, 0.229]

< 0.001

Daily sleep duration (linear) × Depressed status

0.035

0.011

[0.013, 0.058]

0.002

-0.036

0.006

[-0.048, -0.023]

< 0.001

Daily sleep duration (quadratic) × Depressed status

-0.012

0.003

[-0.018, -0.006]

< 0.001

0.004

0.002

[0.001, 0.007]

0.022

Daily sleep duration (cubic) × Depressed status

-0.003

0.001

[-0.004, -0.001]

< 0.001

0.002

0.000

[0.001, 0.002]

< 0.001

Average daily sleep duration

0.020

0.015

[-0.009, 0.048]

0.186

-0.018

0.005

[-0.028, -0.008]

< 0.001

Age

0.008

0.001

[0.006, 0.011]

< 0.001

-0.002

0.000

[-0.002, -0.001]

< 0.001

Gender

-0.036

0.030

[-0.095, 0.070]

0.237

-0.009

0.010

[-0.029, 0.011]

0.392

Race

-0.012

0.042

[-0.094, 0.070]

0.779

-0.051

0.014

[-0.079, -0.024]

< 0.001

Education

-0.051

0.030

[-0.111, 0.008]

0.091

-0.013

0.010

[-0.034, 0.007]

0.192

Anxiety disorder

-0.435

0.107

[-0.645, -0.225]

< 0.001

0.271

0.036

[0.200, 0.342]

< 0.001

Daily stressor (WP)

-0.149

0.008

[-0.164, -0.134]

< 0.001

0.168

0.004

[0.160, 0.177]

< 0.001

Daily positive events (WP)

0.090

0.008

[0.073, 0.106]

< 0.001

0.004

0.005

[-0.005, 0.013]

0.397

Weekend

0.036

0.007

[0.022, 0.051]

< 0.001

-0.030

0.004

[-0.038, -0.022]

< 0.001

Random effects

Intercept SD

0.646

0.209

Residual SD

0.383

0.212