Table 1.
Characteristics of Study Infants by Preoperative Brain Injury
| n † | No Brain Injury* n = 9 |
Brain Injury* n = 10 |
Combined* n = 19 |
Equivalence§ | |
|---|---|---|---|---|---|
| Birth gestational age (weeks) | 19 | 38 39 39 | 37 37 38 | 37 38 39 | E |
| Birth weight (grams) | 19 | 3076 3418 3460 | 2663 3192 3494 | 2769 3360 3488 | NE |
| Apgar Score 1-min | 19 | 8 8 9 | 4.5 7 7 | 7 8 8 | NE |
| Apgar Score 5-min | 19 | 8 9 9 | 7.2 8 8 | 8 8 9 | NE |
| Age at MRI 1 (days)‡ | 19 | 6 8 13 | 6 7 8 | 6 8 10.5 | NE |
| Postmenstrual age MRI 1 (weeks) | 19 | 39.71 39.86 40.14 | 37.75 38.50 40.00 | 38.50 39.71 40.21 | E |
| Age at Surgery (days) | 19 | 6.0 8.0 13.0 | 8.0 8.0 13.8 | 6.0 8.0 13.5 | NE |
| Age at MRI 2 (days)‡ | 16 | 18 19 35 | 26 34 36 | 18 32 36 | NE |
| Postmenstrual age MRI 2 (weeks) | 16 | 40.7 41.6 43.3 | 40.3 42.3 43.2 | 40.7 42.1 43.4 | E |
| Days between MRI 1 and MRI 2‡ | 16 | 8.0 12.0 29.0 | 13.0 27.0 30.0 | 9.5 14.5 29.0 | E |
Abbreviations:
MRI = magnetic resonance imaging
E = equivalent
NE= non-equivalent
Specific notes:
*
a b c represent the lower quartile a, the median b, and the upper quartile c for continuous variables
†
n is the number of non–missing values
‡
MRI 1 = Preoperative brain MRI; MRI 2 = Postoperative brain MRI