Table 2B.
Anatomic, Volumetric, and Functional Echocardiographic Data at 36 Weeks PMA
| Post-Menstrual Age at Birth (Weeks) | p-value* | ||||||
|---|---|---|---|---|---|---|---|
| n | 23 to 26 (N=126) |
n | 27 to 29 (N=114) |
n | 30 to 33 (N=34) |
||
| Med(IQR) or n(%) | Med(IQR) or n(%) | Med (IQR) or n (%) | |||||
| PDA | 129 | 20 (15.5%) | 114 | 12 (10.5%) | 34 | 2 (5.9%) | 0.3 |
| ASD/PFO | 129 | 100 (77.5%) | 114 | 87 (76.3%) | 34 | 28 (82.4%) | 0.7 |
| VSD | 129 | 4 (3.1%) | 114 | 2 (1.8%) | 34 | 1 (2.9%) | 0.7 |
| RVDd | 114 | 0.84 (0.64-1.04) | 101 | 0.81 (0.66-0.98) | 30 | 0.71 (0.58-0.83) | 0.03 |
| LVDd | 115 | 1.77 (1.59-1.91) | 106 | 1.72 (1.62-1.87) | 31 | 1.72 (1.53-1.84) | 0.6 |
| LVEF | 114 | 68 (63.3-73.0) | 105 | 66.5 (62.4-71.8) | 31 | 64.6 (62.6-69.3) | 0.1 |
| FS (%) | 115 | 35.3 (31.7-39.2) | 106 | 33.9 (31.0-38.2) | 31 | 32.6 (31.2-36.2) | 0.08 |
| LV mass (g) | 114 | 5.36 (4.33-6.91) | 104 | 5.77 (4.54-7.02) | 31 | 4.72 (4.14-5.85) | 0.1 |
| LVMPI | 116 | 0.35 (0.28-0.44) | 108 | 0.33 (0.27-0.41) | 31 | 0.32 (0.19-0.41) | 0.08 |
| RVMPI | 111 | 0.25 (0.18-0.35) | 101 | 0.25 (0.17-0.35) | 29 | 0.20 (0.11-0.30) | 0.09 |
| TR jet peak velocity | 13 | 2.84 (2.71-3.00) | 4 | 2.76 (2.47-3.05) | 1 | 2.43 (2.43-2.43) | 0.3 |
| RV pressure estimate | 14 | 31.9 (27.0-36.0) | 4 | 30.5 (24.4-37.1) | 2 | 12.06 (0.50-23.62) | 0.2 |
| AT/ET | 115 | 0.31 (0.25-0.39) | 104 | 0.33 (0.27-0.43) | 31 | 0.76 (0.64-1.02) | 0.2 |
| Mitral Valve E | 65 | 0.86 (0.71-0.93) | 67 | 0.80 (0.68-0.92) | 19 | 0.61 (0.50-0.72) | 0.5 |
| Tricuspid Valve E | 59 | 0.65 (0.56-0.74) | 66 | 0.62 (0.54-0.70) | 20 | 0.6 | |
PDA = patent ductus arteriosus, ASD = atrial septal defect, PFO = patent foramen ovale, VSD = ventricular septal defect, RVDd = right ventricular end-diastolic dimension in diastole, LVDd = left ventricular end-diastolic dimension in diastole, LVEF = left ventricular ejection fraction, FS = fractional shortening, LV = left ventricular, MPI = myocardial performance index, TR tricuspid regurgitant, AT = acceleration time, ET = ejection time
*
P-value was obtained using a non-parametric Wilcoxon Signed Rank Test for paired data.