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Group means and SDs of M and quantities used in the M calculation.
| Quantity | Mean, younger group | SD, younger group | Mean, older group | SD, older group |
|---|---|---|---|---|
| BOLD PSC (hypercapnia) | 9.012 | 2.545 | 10.273 | 2.707 |
| CBF PSC (hypercapnia) | 25.134 | 15.098 | 26.821 | 11.706 |
| M (%) | 9.492 | 2.606 | 10.722 | 2.946 |
