Table 3.
Comparison of infant characteristics by participation in Upstate KIDS and by SART CORS linkage among the primary cohort, Upstate KIDS Study.
| Characteristic (as reported on birth certificate) | Participation in Upstate KIDSa | Linkage with SART CORSb | ||
|---|---|---|---|---|
| Yes (n=626) # (%) |
No (n=1,479) # (%) |
Yes (n=602) # (%) |
No (n=98) # (%) |
|
| Birth order: | ||||
| 1 | 449 (72) | 1005 (68) | 398 (66) | 63 (64) |
| 2 | 84 (13) | 249 (17) | 99 (16) | 14 (14) |
| ≥3 | 93 (15) | 225 (15) | 105 (17) | 21 (21) |
| Plurality of birth: | ||||
| Singleton | 449 (71) | 1005 (68) | 398 (66) | 63 (64) |
| Twin | 181 (29) | 480 (32) | 204 (34) | 35 (36) |
| Clinical estimate of gestation (weeks): | ||||
| <32 | 26 (5) | 66 (5) | 26 (5) | 5 (6) |
| 32–36 | 62 (11) | 200 (15) | 72 (14) | 11 (12) |
| ≥37 | 474 (84) | 1082 (80) | 432 (82) | 74 (82) |
| Mean (±SD) | 37.6 (2.7) | 37.4 (2.9) | 37.3 (2.9) | 37.3 (2.9) |
| Birth weight (grams): | ||||
| <2500 | 115 (18) | 306 (21) | 139 (23) | 19 (19) |
| 2500–2999 | 128 (20) | 336 (23) | 130 (22) | 24 (24) |
| 3000–3499 | 187 (30) | 393 (27) | 177 (29) | 26 (27) |
| 3500–3999 | 142 (23) | 330 (22) | 117 (19) | 24 (24) |
| ≥4000 | 54 (9) | 114 (8) | 39(6) | 5(5) |
| Mean (±SD) | 3064 (725) | 3004 (750) | 3000 (738) | 2967 (768) |
| Infant interhospital-transfer: | ||||
| No | 618 (99) | 1456 (99) | 594 (99) | 96 (98) |
| Yes, within 24 hours | 4 (1) | 18 (1) | 4 (1) | 2 (2) |
| After 24 hours | 3 (0) | 4 (0) | 3 (1) | 0 (0) |
| Abnormal conditions of the newborn: | ||||
| None | 506 (81) | 1132 (77)c | 474(79) | 75 (77) |
| Yes, any | 120 (19) | 347 (23) | 128 (21) | 23 (23) |
| Yes, assisted ventilation (immediately following delivery and/or >6 hours) | 55 (9) | 147 (10) | 57 (9) | 11 (11) |
| Yes, NICU admission | 107 (17) | 328 (22) | 118 (19) | 22 (21) |
| Yes, surfactant therapy | 7 (1) | 27 (2) | 8 (1) | 1 (1) |
| Yes, antibiotics for suspected sepsis | 45 (7) | 118 (8) | 42 (7) | 9 (9) |
| Congenital anomalies: | ||||
| None | 502 (81) | 1117 (76)c | 471 (78) | 72 (76) |
| Yes (any) | 120 (19) | 347 (24) | 130 (22) | 23 (24) |
| Fetal presentation: | ||||
| Cephalic | 527 (84) | 1253 (85) | 495 (82) | 81 (83)c |
| Breech | 92 (15) | 200 (14) | 100 (17) | 13 (13) |
| Other | 7 (1) | 26 (2) | 7 (1) | 4 (4) |
| Delivery Mode: | ||||
| Spontaneous | 234 (37) | 439 (30)d | 208 (35) | 31 (32) |
| Forceps (mid, low) | 2(0) | 10 (1) | 2 (0) | 0 (0) |
| Vacuum | 16 (3) | 48 (3) | 12 (2) | 1 (1) |
| Caesarean | 373 (60) | 981 (66) | 379 (63) | 66 (67) |
Note: Analysis limited to singletons and one randomly selected twin sib resulting in a loss of 10 and 20 mothers from the analysis of Upstate KIDS participation and SART CORS linkage, respectively. Significance tests for contingency tables, and mean (SD) correspond to chi-squared tests and two-sample t-tests, respectively.
a
Restricted to 2,115 mothers for whom ART was indicated on infants’ birth certificates.
b
Excludes mothers who did not report ART and who did not link to SART CORS.
c
P ≤0.03
d
P ≤0.01