Comparisons of mean (SD) transductal velocity ratios between haemodynamically significant and non-significant ducts as assessed by various echocardiographic criteria for infants < 5 days old
| Echo criteria used to assess significance of PDA | Significant | Non-significant | p Value |
| LA/Ao > 1.48 | 1.5 (1.0) (n = 9) | 2.3 (1.1) (n = 12) | 0.10 |
| Reverse/absent diastolic flow3-150 | 1.7 (0.9) (n = 12) | 2.6 (1.4) (n = 7) | 0.14 |
Numbers in columns differ slightly due to unavailability of some variables in individual patients.
p Value assessed by Student's t test.
↵3-150 Reverse or absent diastolic flow in the descending aorta.
LA/Ao, left atrial diameter/aortic diameter ratio.