Table 4.
Participant characteristics and outcomes stratified by concordance of GBS cultures
| Concordant n=501 | Discordant n=58 | P | Remained Negative n=409 | Positive to Negative n=17 | P | Remained Positive n=92 | Negative to Positive n=41 | P | |
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Maternal age (yrs) | 32.1 ± 5.1 | 30.5 ± 7.1 | 0.09 | 32.3 ± 5.1 | 31.0 ± 6.3 | 0.31 | 31.4 ± 5.4 | 30.3 ± 7.5 | 0.39 |
|
| |||||||||
| Gestational age (wks) | |||||||||
| Antepartum culture | 35.9 ± 0.9 | 35.7 ± 0.7 | 0.15 | 35.8 ± 0.9 | 35.7 ± 0.7 | 0.66 | 36.0 ± 0.9 | 35.7 ± 0.7 | 0.04 |
| Intrapartum culture | 39.4 ± 1.3 | 39.2 ± 1.3 | 0.31 | 39.4 ± 1.3 | 39.0 ± 1.6 | 0.23 | 39.4 ± 1.1 | 39.3 ± 1.3 | 0.51 |
|
| |||||||||
| Interval between cultures (wks) | 3.5 ± 1.3 | 3.5 ± 1.5 | 0.99 | 3.5 ± 1.3 | 3.2 ± 1.4 | 0.40 | 3.4 ± 1.4 | 3.6 ± 1.5 | 0.46 |
|
| |||||||||
| Race/ethnicity | 0.008 | 0.09 | 0.16 | ||||||
| White | 309 (61.7) | 29 (50.0) | 254 (62.1) | 11 (64.7) | 55 (59.8) | 18 (43.9) | |||
| Asian/Pacific Islander | 74 (14.8) | 3 (5.2) | 66 (16.1) | 0 (0.0) | 8 (8.7) | 3 (7.3) | |||
| Black | 61 (12.2) | 13 (22.4) | 43 (10.5) | 5 (29.4) | 18 (19.6) | 8 (19.5) | |||
| Hispanic | 43 (8.6) | 10 (17.2) | 34 (8.3) | 1 (5.9) | 9 (9.8) | 9 (22.0) | |||
| Other or >1 race/ethnicity | 14 (2.8) | 3 (5.2) | 12 (2.9) | 0 (0.0) | 2 (2.2) | 3 (7.3) | |||
|
| |||||||||
| NAAT result | <0.0001 | <0.0001 | 0.01 | ||||||
| Positive | 91 (18.2) | 38 (65.5) | 5 (1.2) | 5 (29.4) | 86 (93.5) | 33 (80.5) | |||
| Negative | 399 (79.6) | 19 (32.8) | 395 (96.6) | 11 (64.7) | 4 (4.4) | 8 (19.5) | |||
| Indeterminate | 11 (2.2) | 1 (1.7) | 9 (2.2) | 1 (5.9) | 2 (2.2) | 0 | |||
|
| |||||||||
| Neonatal sepsis evaluation | 98 (19.6) | 14 (24.1) | 0.41 | 73 (17.9) | 5 (29.4) | 0.21 | 25 (27.2) | 9 (22.0) | 0.52 |
|
| |||||||||
| Any NICU admission | 112 (22.4) | 14 (24.1) | 0.76 | 83 (20.3) | 5 (29.4) | 0.36 | 29 (31.5) | 9 (22.0) | 0.26 |
Data are presented as mean ± standard deviation or n (%)