Table 2.
Characteristics of treated versus nontreated infants
| Characteristic | Treated (n=10) | Nontreated (observation and normal) (n=145) | P value |
|---|---|---|---|
| Gestational age (wk) | 29.2±1.4 | 29.6±2.0 | 0.583a) |
| <28 | 2 (20.0) | 36 (24.8) | >0.999b) |
| ≥28 | 8 (80.0) | 109 (75.2) | |
| <30 | 7 (70.0) | 68 (46.9) | 0.199b) |
| ≥30 | 3 (30.0) | 77 (53.1) | |
| <31 | 9 (90.0) | 94 (64.8) | 0.166b) |
| ≥31 | 1 (10.0) | 51 (35.2) | |
| Body weight (kg) | 1,240±237 | 1,295±335 | 0.607c) |
| <1 | 1 (10.0) | 31 (21.4) | 0.689b) |
| ≥1 | 9 (90.0) | 114 (78.6) | |
| <1.5 | 9 (90.0) | 101 (69.7) | 0.283b) |
| ≥1.5 | 1 (10.0) | 44 (30.3) | |
| Female sex | 7 (70.0) | 77 (53.1) | 0.346b) |
| Breech | 5 (50.0) | 43 (29.7) | 0.286b) |
| USG1_d (day) | 63±17 | 65±26 | 0.865a) |
| USG1_PMA (wk) | 38.2±1.7 | 38.8±2.5 | 0.732c) |
| <37 | 2 (20.0) | 33 (22.8) | >0.999b) |
| ≥37 | 8 (80.0) | 112 (77.2) | |
| <38 | 5 (50.0) | 72 (49.7) | >0.999b) |
| ≥38 | 5 (50.0) | 73 (50.3) | |
| <40 | 8 (80.0) | 105 (72.4) | 0.730b) |
| ≥40 | 2 (20.0) | 40 (27.6) | |
| USG2_d (day) | 98±23 | 97±27 (N=13) | 0.933a) |
| USG2_PMA (wk) | 43.2±2.2 | 43.3±2.9 (N=13) | 0.894a) |
Values are presented as mean±standard deviation or number (%).
USG1_d, postnatal day of first ultrasonography; USG1_PMA, postmenstrual age at first ultrasonography; USG2_d, postnatal day of second ultrasonography; USG2_PMA, postmenstrual age of second ultrasonography.
a)
t test,
b)
Fisher exact test,
c)
Mann-Whitney U test.