Table 1 Overview of the measurement schedule
Measurement methods | n | Measurement period I (Sept/Oct) | Sept/Oct–Apr/May | Measurement period II (Apr/May) |
|---|---|---|---|---|
Questionnaire | 1960 | One time | − | One time |
Anthropometry | 1960 | One time | − | One time |
Smartphone application | 1960 | Daily | Daily | − |
Food diary | 1960 | 3 days | − | − |
Actigraphy | 260 | 7 days | − | 7 days |
Light sensor | 260 | 7 days | − | 7 days |
Blood sample | 245 | − | − | One time |