Proportion of cases with a noticeable change in Doppler sounds (S-test)
POSITIVE
The proportions of positive S-tests for each dose group, as determined by rater 1, were 50.8% (0.1 mL/kg), 73.2% (0.3 mL/kg), and 78.1% (0.5 mL/kg) (Positive results in the S-test as determined by rater 1 and rater 2.CI, confidence interval; OR, odds ratio; S-test, precordial Doppler sound test.