Table 2.
Correlation Matrix for Outcome Measures
| Bedtime | Latency | Sleep duration |
Wake time |
Bedtime cortisol |
Waking cortisol |
CAR | |
|---|---|---|---|---|---|---|---|
| Bedtime | 1.000 | ||||||
| Latency | −0.261 | 1.000 | |||||
| Sleep duration | −0.672 | −0.106 | 1.000 | ||||
| Wake time | 0.303 | 0.073 | 0.328 | 1.000 | |||
| Bedtime cortisol | −0.073 | 0.066 | 0.002 | 0.074 | 1.000 | ||
| Waking cortisol (next day) | −0.112 | 0.056 | 0.206 | 0.227 | 0.222 | 1.000 | |
| CAR | 0.145 | −0.230 | −0.204 | −0.235 | −0.154 | −0.457 | 1.000 |
Correlations between outcomes measured in the main analysis. Note that some measures are mathematically related to each other.