Table 4.
Comparison of infant characteristics at time of ROP study visits
| Infant Characteristics | ROP study visits | |||
|---|---|---|---|---|
| All visits (n=4238) |
Without AE (n=4173 visits) |
With AE (n=65 visits) |
p value* **(adjusted) |
|
| Weight (grams) mean (SD) | 2055 (585) | 2058 (585) | 1855 (557) | 0.006 (0.17) |
| PMA (weeks) mean (SD) | 36.3 (2.6) | 36.3 (2.6) | 35.5 (2.6) | 0.02 (0.57) |
| PNA (weeks) mean (SD) | 9.8 (3.3) | 9.8 (3.3) | 9.2 (3.2) | 0.12 |
| BIO exam occurred 1st and imaging occurred 2nd or was deferred n (%) | 2738 (66) | 2690 (66) | 48 (75) | 0.10 |
| Enteral nutritional status n (%) | 0.15§ | |||
| NPO | 322 (8) | 313 (7.5) | 9 (14) | |
| Partial enteral feeds | 675 (16) | 666 (16) | 9 (14) | |
| Full enteral feeds | 3241 (76) | 3194 (77) | 47 (72) | |
| Respiratory support status n (%) | 0.03^ (0.04) | |||
| Ventilator | 508 (12) | 492 (12) | 16 (25) | |
| CPAP | 975 (23) | 955 (23) | 20 (31) | |
| Nasal Cannula ≤2L/min | 1398 (33) | 1383 (33) | 15 (23) | |
| No Support | 1328 (32) | 1314 (32) | 14 (22) | |
§
NPO versus all other forms of nutrition support
^
ventilator versus all other forms of respiratory support
*
p value for difference between infants with and without AEs using two-sample t-test for mean and Chi-squared test for proportional difference
**
p value for multivariable logistic regression with weight, PMA, and ventilator support at ROP visit
Abbreviations: PMA, postmenstrual age; PNA, postnatal age; BIO binocular indirect ophthalmoscopy; NPO nils per os; CPAP all forms of nasal, continuous positive airway pressure; NC nasal cannula.
Percentages may not add up to 100% due to rounding.