Table 5.
Changes in ventilatory and cardiovascular variables from baseline during head down rotation (HDR) in the young and older subjects
| Variable | HDR | ||
|---|---|---|---|
| Young | Older | P value | |
| (n = 14) | (n = 10) | ||
| ▵Inspiratory time (ms) | −25 ± 67 | 72 ± 91 | 0.386 |
| ▵Expiratory time (ms) | 2 ± 120 | 46 ± 12 | 0.789 |
| ▵Ventilation (1 min−1) | 0.2 ± 0.5 | −0.9 ± 0.3* | 0.102 |
| ▵A Breathing frequency (breaths min−1) | 1 ± 1 | 0 ± 1 | 0.394 |
| ▵Tidal volume (ml) | −8 ± 50 | 56 ± 27 | 0.137 |
| ▵HR (beats min−1) | 3 ± 1* | −3 ± 1* | 0.002 |
| ▵MAP (mmHg) | 0 ± 1 | −5 ± 2* | 0.027 |
Values are mean ±s.e.m.P value represents the interaction term from the ANOVA (age x intervention).
*
P < 0.05 for change from baseline.