Table 4.
Percentage of cases with some evidence of each of the 9 proposed phenotypes, and mean delivery gestational age (+/− SD) among those with and without each phenotype.
| Phenotype | Number of SPTB Cases with Phenotype (from total n=1025) |
Delivery Gestational Age (weeks, +/− SD) with Phenotype |
Delivery Gestational Age (weeks, +/− SD) without Phenotype |
p- value |
|---|---|---|---|---|
| Infection / Inflammation | ||||
| Strong Evidence | 86 (8.4) | 29.1 (3.4) | 30.1 (3.2) | 0.006 |
| Moderate Evidence | 98 (9.6) | 28.3 (3.6) | 30.2 (3.1) | <0.001 |
| Possible Evidence | 272 (26.5) | 29.9 (3.2) | 30.0 (3.2) | 0.620 |
| Any Evidence | 388 (37.9) | 29.6 (3.4) | 30.3 (3.1) | <0.001 |
| Decidual Hemorrhage | ||||
| Strong Evidence | 4 (0.4) | 27.6 (4.0) | 30.0 (3.2) | 0.131 |
| Moderate Evidence | 150 (14.6) | 29.4 (3.4) | 30.1 (3.2) | 0.008 |
| Possible Evidence | 202 (19.7) | 29.1 (3.5) | 30.2 (3.1) | <0.001 |
| Any Evidence | 316 (30.8) | 29.3 (3.5) | 30.3 (3.1) | <0.001 |
| Maternal Stress | ||||
| Strong Evidence | 47 (4.6) | 31.3 (2.7) | 29.9 (3.2) | 0.005 |
| Moderate Evidence | 306 (29.9) | 30.1 (3.3) | 30.0 (3.2) | 0.646 |
| Possible Evidence | 422 (41.2) | 29.6 (3.2) | 30.3 (3.2) | 0.001 |
| Any Evidence | 580 (56.6) | 29.8 (3.2) | 30.2 (3.2) | 0.081 |
| Cervical insufficiency | ||||
| Strong Evidence | 68 (6.6) | 27.1 (2.6) | 30.2 (3.2) | <0.001 |
| Moderate Evidence | 51 (5.0) | 28.2 (2.7) | 30.1 (3.2) | <0.001 |
| Possible Evidence | 22 (2.2) | 28.0 (2.5) | 30.0 (3.2) | 0.003 |
| Any Evidence | 119 (11.6) | 27.7 (2.7) | 30.3 (3.2) | <0.001 |
| Uterine distension | ||||
| Strong Evidence | -- | -- | -- | -- |
| Moderate Evidence | 175 (17.1) | 30.2 (2.8) | 30.0 (3.3) | 0.448 |
| Possible Evidence | 43 (4.2) | 30.3 (3.0) | 30.0 (3.2) | 0.539 |
| Any Evidence | 212 (20.7) | 30.2 (2.9) | 30.0 (3.3) | 0.418 |
| Placental dysfunction | ||||
| Strong Evidence | 39 (3.8) | 30.8 (3.0) | 30.0 (3.2) | 0.114 |
| Moderate Evidence | 84 (8.2) | 30.2 (3.4) | 30.0 (3.2) | 0.643 |
| Possible Evidence | 55 (5.4) | 30.2 (3.3) | 30.0 (3.2) | 0.639 |
| Any Evidence | 122 (11.9) | 30.0 (3.4) | 30.0 (3.2) | 0.855 |
| PPROM | ||||
| Strong Evidence | 211 (20.6) | 30.0 (3.0) | 30.0 (3.3) | 0.950 |
| Moderate Evidence | 141 (149 | 30.6 (3.2) | 29.9 (3.2) | 0.014 |
| Possible Evidence | 49 (4.8) | 29.7 (3.0) | 30.0 (3.2) | 0.440 |
| Any Evidence | 362 (35.3) | 30.2 (3.1) | 29.9 (3.3) | 0.078 |
| Maternal Co-morbidities | ||||
| Strong Evidence | 87 (8.5) | 30.7 (2.7) | 29.9 (3.3) | 0.029 |
| Moderate Evidence | 182 (17.8) | 30.4 (3.1) | 29.9 (3.2) | 0.040 |
| Possible Evidence | -- | -- | -- | -- |
| Any Evidence | 216 (21.1) | 30.3 (3.1) | 29.9 (3.2) | 0.102 |
| Familial | ||||
| Strong Evidence | 227 (22.2) | 30.4 (3.0) | 29.9 (3.3) | 0.023 |
| Moderate Evidence | 143 (14.0) | 29.9 (3.4) | 30.0 (3.2) | 0.801 |
| Possible Evidence | -- | -- | -- | -- |
| Any Evidence | 331 (32.3) | 30.2 (3.2) | 29.9 (3.2) | 0.113 |