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The data in this table were collected from five healthy volunteers, with a mean age of 25 and BMI of 22.0.
| Time of Day | Mean Optic Nerve Sheath Diameter (mm) | Mean Breath-holding Index | Mean Rapid Ultrasonographic Brain Index (RUBI) |
|---|---|---|---|
| 8:00 AM | 3.28 | 1.13 | 0.01 |
| 12:00 PM | 3.35 | 1.12 | 0.01 |
| 5:00 PM | 3.27 | 1.03 | 0.01 |
