Table 2.
Dynamic upper airway responses
| Outcome | African-American Median (range) | Caucasian Median (range) | M-W P-value | Probabilistic Index* | Observed Median Difference | Population Median Difference | 95% CI of the Population Difference |
|---|---|---|---|---|---|---|---|
| SPF (activated) | 9.6 (-8.8, 46.1) | 9.0 (-8.6, 64.3) | 1.00 | 0.00 | 0.6 | 0.0 | -5.0, 5.1 |
| Pcrit (activated) | -25.0 (-25.0, -2.8) | -25.0 (-25.0, -3.8) | 0.89 | 0.02 | 0.0 | 0.0 | 0.0, 1.1 |
| SPF (hypotonic) | 12.8 (-20.4, 46.4) | 8.1 (-5.0, 53.8) | 0.39 | 0.14 | 4.7 | 3.4 | -5.4, 9.5 |
| Pcrit (hypotonic) | -18.8 (-25.0, -2.8) | -24.8 (-25.0, -3.6) | 0.41 | 0.13 | 6.0 | 0.0 | -0.5, 5.5 |
SPF, slope of the pressure-flow response (ml/s/cm H2O); Pcrit, critical closing pressure (cm H2O); M-W, Mann-Whitney P-value; CI, 95% confidence interval.
*
Probabilistic Index = [2(U/mn) -1], where U/mn is the Mann-Whitney Ustatistic divided by the product of the 2 sample sizes