Table 1.
Results of two-way repeated-measures ANOVA for hemodynamic responses and oxygenation changes in the relatively deeper layer over the forehead in response to hypoxia.
| Items | Variables | Results of two-way repeated measures ANOVA | |||
|---|---|---|---|---|---|
| Deoxy-Hb |
Ch | 1.00 | 10.10 | 0.007** | 0.42 |
| Error |
14.00 |
— |
— |
— |
|
| Time | 2.80 | 230.52 | 0.000*** | 0.94 | |
| Error |
39.26 |
— |
— |
— |
|
| Ch* time | 1.50 | 6.98 | 0.008** | 0.33 | |
| Error |
20.97 |
— |
— |
— |
|
| Oxy-Hb |
Ch | 1.00 | 17.62 | 0.001** | 0.56 |
| Error |
14.00 |
— |
— |
— |
|
| Time | 3.65 | 61.14 | 0.000*** | 0.81 | |
| Error |
51.08 |
— |
— |
— |
|
| Ch* time | 3.01 | 8.50 | 0.000*** | 0.38 | |
| Error |
42.14 |
— |
— |
— |
|
| Total-Hb |
Ch | 1.00 | 1.16 | 0.299 | 0.08 |
| Error |
14.00 |
— |
— |
— |
|
| Time | 3.99 | 30.75 | 0.000*** | 0.69 | |
| Error |
55.91 |
— |
— |
— |
|
| Ch* time | 2.81 | 1.93 | 0.144 | 0.12 | |
| Error |
39.30 |
— |
— |
— |
|
| Ch | 1.00 | 17.62 | 0.001** | 0.56 | |
| Error |
14.00 |
— |
— |
— |
|
| Time | 3.65 | 61.14 | 0.000*** | 0.81 | |
| Error |
51.08 |
— |
— |
— |
|
| Ch* time | 3.01 | 8.50 | 0.000*** | 0.38 | |
| Error | 42.14 | — | — | — | |
The effects of hypoxia on changes in hemodynamics in the relatively deep layer over the forehead (time) and the difference in hemodynamic responses between FPL and FPR (channel; Ch) were analyzed using two-way repeated-measures ANOVA (Ch × time) in conjunction with the Bonferroni post hoc test for multiple comparisons. Asterisks indicate significant main effects of time or Ch or interaction at *, **, and ***.
Oxy-Hb, oxygenated hemoglobin; deoxy-Hb, deoxygenated hemoglobin; total-Hb, total hemoglobin; , tissue oxygen saturation; FPL, left frontal pole; FPR, right frontal pole; ANOVA, analysis of variance.