Table 3 Birth Outcomes by joint trajectory groups
| Â | Total | Group 1: Normal | Group 2: Low Normal | Group 3: High Normal | Group 4: Abnormal | P value* |
|---|---|---|---|---|---|---|
Gestational Age (weeks) (%) | N = 1532 | N = 764 | N = 382 | N = 316 | N = 70 | < 0.0001 |
 Term (≥ 37) | 1262 (82) | 642 (84) | 341 (89) | 244 (77) | 35 (50) |  |
 Any Preterm (<  37) | 270 (18) | 122 (16) | 41 (11) | 72 (23) | 35 (50) |  |
  Late Preterm (34–37) | 93 (6) | 45 (6) | 19 (5) | 20 (7) | 9 (13) |  |
  Moderately Preterm (32–34) | 120 (8) | 52 (7) | 14 (4) | 38 (12) | 16 (23) |  |
  Very Preterm (28–32) | 57 (4) | 25 (3) | 8 (2) | 14 (4) | 10 (14) |  |
Birthweight (g) (%) | N = 1530 | N = 763 | N = 384 | N = 312 | N = 71 | < 0.0001 |
 Normal (≥2500) | 1333 (87) | 675 (88) | 342 (89) | 268 (86) | 48 (68) |  |
 Any LBW (< 2500) | 197 (13) | 88 (12) | 42 (11) | 44 (14) | 23 (32) |  |
  LBW (< 2500) | 159 (10) | 75 (10) | 37 (10) | 34 (11) | 13 (18) |  |
  Very LBW (< 1500) | 38 (3) | 13 (2) | 5 (1) | 10 (3) | 10 (14) |  |
 Mean (SD) | 3116 (644) | 3146 (616) | 3158 (550) | 3110 (686) | 2580 (934) |  |