Table 6. Effects of exposure to a forest environment on NK cell and activating NK cell.
| (A) Comparisons before and after the forest trip in Xitou for five days | |||||
|---|---|---|---|---|---|
| N = 11 | Pre-forest trip | Post-forest trip | Paired-difference | p-valuea | |
| NK cell level (%) | 22.49 ± 11.76 | 23.72 ± 15.05 | 1.23 | 0.411 | |
| Activating NK cell (%) | 0.83 ± 0.39 | 1.72 ± 0.1 | 0.89 | 0.002 | |
| (B) Comparisons before and after the forest trip and four days after returning to Taipei | ||||
|---|---|---|---|---|
| N = 7 | Pre-forest trip | Four days after | Paired-difference | p-value |
| NK cell level (%) | 20.51 ± 11.27 | 20.98 ± 10.99 | 0.47 | 0.746 |
| Activating NK cell (%) | 0.77 ± 0.38 | 1.13 ± 0.43 | 0.36 | 0.004 |
aP-value by using paired t-tests.
Participant characteristics: data was shown in average.
(A) group: age, 60.4 years; body mass index, 23.54 kg/m2; male, 27.3%; high-sensitivity C-reactive protein, 0.12 mg/L; systolic blood pressure, 113 mmHg.
(B) group: age, 61.8 years; body mass index, 23.57 kg/m2; male, 14.3%; high-sensitivity C-reactive protein, 0.13 mg/L; systolic blood pressure, 106 mmHg.