Table 3

Age-specific reference data for the CARTs

Age (years)Supine-to-upright position ratio
n=464
Deep-breathing ratio
n=462
Valsalva maneuver ratio
n=377
NEstimate (95% CI)NEstimate (95% CI)NEstimate (95% CI)
20–29231.08 (1.05 to 1.11)221.17 (1.13 to 1.21)171.23 (1.10 to 1.35)
30–39531.06 (1.03 to 1.08)521.14 (1.11 to 1.17)471.19 (1.10 to 1.29)
40–49791.03 (1.02 to 1.05)771.11 (1.09 to 1.13)681.16 (1.09 to 1.23)
50–591381.01 (1.01 to 1.02)1401.08 (1.06 to 1.09)1191.13 (1.09 to 1.17)
60–691241.00 (1.00 to 1.00)1251.05 (1.04 to 1.06)971.09 (1.06 to 1.13)
70–79471.00 (1.00 to 1.00)461.02 (1.00 to 1.03)291.06 (1.01 to 1.11)
  • 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.