Age-specific reference data for the CARTs
| Supine-to-upright-position ratio n=377 | Deep-breathing ratio n=373 | Valsalva manoeuvre ratio n=310 | ||||
| Age (years) | N | Estimate (95% CI) | N | Estimate (95% CI) | N | Estimate (95% CI) |
| 20–29 | 23 | 1.09 (1.04 to 1.13) | 22 | 1.17 (1.11 to 1.23) | 17 | 1.28 (1.18 to 1.38) |
| 30–39 | 47 | 1.06 (1.03 to 1.09) | 46 | 1.14 (1.10 to 1.18) | 43 | 1.23 (1.16 to 1.30) |
| 40–49 | 69 | 1.04 (1.01 to 1.06) | 67 | 1.11 (1.08 to 1.14) | 58 | 1.18 (1.13 to 1.23) |
| 50–59 | 117 | 1.01 (1.00 to 1.02) | 119 | 1.08 (1.07 to 1.10) | 101 | 1.13 (1.06 to 1.20) |
| 60–69 | 96 | 1.00 (1.00 to 1.00) | 95 | 1.06 (1.04 to 1.07) | 77 | 1.08 (1.00 to 1.18) |
| 70–79 | 25 | 1.00 (1.00 to 1.00) | 24 | 1.03 (1.00 to 1.05) | 14 | 1.03 (1.00 to 1.16) |
The results are estimated from the median age of the specific age spans and are presented as ratios with 95% CI.
CARTs, cardiovascular autonomic reflex tests.