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Correlations between different measures of time in bed and total sleep time
| Screening TIB | Screening TST | Diary TIB | Diary TST | Actigraphic TIB | Actigraphic TST | |
|---|---|---|---|---|---|---|
| Screening TIB | 0.611* | 0.747* | 0.656* | 0.645* | 0.331 | |
| Screening TST | 0.687* | 0.581* | 0.585* | 0.684* | ||
| Diary TIB | 0.836* | 0.901* | 0.650* | |||
| Diary TST | 0.813* | 0.557* | ||||
| Actigraphic TIB | 0.652* |
Indicates a significant association between the two variables (P < 0.01) using Spearman rank-order correlations (rS).
TIB, time in bed; TST, total sleep time.
