T0 | T1 | |||
---|---|---|---|---|
Education level | High | Low | High | Low |
Country | ||||
Sleep duration weekdays (h/day) a | ||||
Portugal | 3 (2–3) | 2 (2–3) | 3 (2–3) | 2 (2–3) |
The Netherlands | 3 (3–3) | 3 (2–3) | 3 (3–3) | 3 (3–3) |
Sleep duration weekend days (h/day) a | ||||
The Netherlands | 3 (3–3) | 3 (2–3) | 3 (3–3) | 3 (3–3) |