Table 2.
Sample characteristics at baseline as divided by tea consumed or chronic stress level.
| Parameter | Tea consumed | Chronic stress level | ||
|---|---|---|---|---|
| Control (n = 15) | GABA-enriched oolong (n = 15) | Low (n = 15) | High (n = 15) | |
| Gender (% male) | 33 | 40 | 47 | 27 |
| Age (years) | 21.00 ± 1.414 | 21.73 ± 1.710 | 21.27 ± 1.534 | 21.47 ± 1.685 |
| PSS score | 23.47 ± 8.551 | 28.87 ± 9.094 | 19.20 ± 5.401 | 33.13 ± 6.186* |
| Acute stress score | 0.537 ± 0.259 | 0.557 ± 0.306 | 0.381 ± 0.270 | 0.712 ± 0.171* |
| Average RR interval (ms) | 856.8 ± 120.0 | 864.1 ± 203.3 | 829.9 ± 112.5 | 891.0 ± 202.8 |
| TP | 3.379 ± 0.293 | 3.349 ± 0.268 | 3.377 ± 0.325 | 3.350 ± 0.228 |
| LF | 2.689 ± 0.387 | 2.762 ± 0.289 | 2.811 ± 0.380 | 2.641 ± 0.276 |
| HF | 2.849 ± 0.423 | 2.854 ± 0.357 | 2.816 ± 0.471 | 2.887 ± 0.287 |
| LF/HF | −0.159 ± 0.314 | −0.092 ± 0.322 | −0.006 ± 0.325 | −0.246 ± 0.260* |
| UNTRANSFORMED VALUES | ||||
| Acute stress score | 3.97 ± 0.522 | 4.40 ± 0.675 | 2.83 ± 0.401 | 5.53 ± 0.559 |
| TP (ms2) | 3026 ± 689 | 2636 ± 420 | 3099 ± 698 | 2563 ± 399 |
| LF (ms2) | 729 ± 214 | 699 ± 111 | 909 ± 215 | 520 ± 80 |
| HF (ms2) | 1017 ± 222 | 973 ± 217 | 1023 ± 234 | 967 ± 204 |
| LF/HF | 0.880 ± 0.189 | 0.996 ± 0.160 | 1.218 ± 0.207 | 0.658 ± 0.091 |
*
Significantly different (p < 0.05) than the corresponding value in the low chronic stress group.