Table 1
Pearson's correlation coefficient (r) and concentrations of passive saliva (P) and cotton saliva (C) melatonin for all, lower-level (<6 pg/mL), and higher-level (>6 pg/mL) samples.
| Mean and standard deviation (SD) | r | ||
|---|---|---|---|
| P (pg/mL) | C (pg/mL) | P vs. C | |
| <6 pg/mL | 3.14 (1.10) | 3.04 (1.04) | 0.01 |
| >6 pg/mL | 24.22 (14.82) | 4.91 (1.55)** | 0.44* |
| All | 15.43 (15.40) | 4.13 (1.63)** | 0.62** |
**p < 0.01
Figure 1
Scatter plots of melatonin concentrations between passive and cotton saliva collection for all (a), lower-level (b), and higher-level (c) samples.
Figure 2
BA plots of passive and cotton saliva collection for all (a), lower-level (b), and higher-level (c) samples.