Table 2.
Characteristics of the Study Population
| Initial Examination (n = 4993) |
Worst Examination (n = 5140) |
|||||||
|---|---|---|---|---|---|---|---|---|
| ROP (n = 175) |
No ROP (n = 4818) |
ROP (n = 322) |
No ROP (n = 4818) |
|||||
| mHTN (n = 52) | No mHTN (n = 123) | mHTN (n = 912) | No mHTN (n = 3906) | mHTN (n = 76) | No mHTN (n = 246) | mHTN (n = 912) | No mHTN (n = 3906) | |
| Birth weight, g | ||||||||
| ≤700 | 20 (39) | 25 (20) | 36 (4) | 132 (3) | 27 (36) | 54 (22) | 36 (4) | 132 (3) |
| >700 to ≤1000 | 22 (42) | 57 (46) | 94 (10) | 205 (5) | 36 (47) | 117 (48) | 94 (10) | 205 (5) |
| >1000 | 10 (19) | 41 (33) | 782 (86) | 3569 (91) | 13 (17) | 75 (30) | 782 (86) | 3569 (91) |
| Mean (SD) | 823 (291.41) | 948 (276.60) | 1725 (699.82) | 2145 (798.41) | 815 (264.80) | 930 (305.39) | 1725 (699.82) | 2145 (798.41) |
| Initial Examination (n = 4996) |
Worst Examination (n = 5143) |
|||||||
|---|---|---|---|---|---|---|---|---|
| ROP (n = 176) |
No ROP (n = 4820) |
ROP (n = 323) |
No ROP (n = 4820) |
|||||
| mHTN (n = 52) | No mHTN (n = 124) | mHTN (n = 912) | No mHTN (n = 3908) | mHTN (n = 76) | No mHTN (n = 247) | mHTN (n = 912) | No mHTN (n = 3908) | |
| Gestational age, wk | ||||||||
| ≤27 | 22 (42) | 83 (67) | 60 (7) | 317 (8) | 34 (45) | 165 (67) | 60 (7) | 317 (8) |
| >27 | 30 (58) | 41 (33) | 852 (93) | 3591 (92) | 42 (55) | 82 (33) | 852 (93) | 3591 (92) |
| Mean (SD) | 28 (2.44) | 27 (2.40) | 32 (2.92) | 33 (3.49) | 28 (2.00) | 27 (2.53) | 32 (2.92) | 33 (3.49) |
| Erythropoietin received | ||||||||
| Yes | 14 (73) | 37 (30) | — | — | 22 (29) | 67 (27) | — | — |
| No | 38 (27) | 87 (70) | — | — | 54 (71) | 180 (73) | — | — |
Data are expressed as n (%), except where noted. mHTN, maternal new-onset gestational hypertension.