Table 1.
Patient demographics and comparisons between the readmitted group and the not readmitted group.
| Characteristics | All patients (N=32,645) | Readmitted (n=170) | Not readmitted (n=32,475) | P value | |||||||
| Maternal age, mean (SD) | 30.5 (5.3) | 32.9 (5.7) | 30.5 (5.3) | <.001 | |||||||
| Parity, n (%) | .29 | ||||||||||
|
|
Nulliparous | 10,786 (33) | 61 (35.9) | 10,725 (33) |
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Multiparous | 17,946 (55) | 95 (55.9) | 17,851 (55) |
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Unknown | 3913 (12) | 14 (8.2) | 3899 (12) |
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| Gestational age at delivery in weeks, mean (SD) | 38.9 (2.4) | 37.7 (2.5) | 38.9 (2.4) | <.001 | |||||||
| Race, n (%) | <.001 | ||||||||||
|
|
White | 26,188 (80.2) | 130 (76.5) | 26,058 (80.2) |
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Black | 1221 (3.7) | 18 (10.6) | 1203 (3.7) |
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Asian Indian | 2532 (7.8) | 12 (7.1) | 2520 (7.8) |
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Asian, other | 855 (2.6) | 3 (1.8) | 852 (2.6) |
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|
|
American Indian or Native | 457 (1.4) |
1 (0.6) |
456 (1.4) |
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|
|
Native Hawaiian | 67 (0.2) | 0 (0) | 67 (0.2) |
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|
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Unknown or other | 1325 (4.1) | 6 (3.5) | 1319 (4.1) |
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| Hispanic, n (%) | .05 | ||||||||||
|
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Yes | 2937 (9) | 8 (4.7) | 2929 (9) |
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No | 29,708 (91) | 162 (95.3) | 29,546 (91) |
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| BMIa, mean (SD) | 26.5 (8.6) | 28.7 (8.6) | 26.5 (8.9) | .001 | |||||||
| Mode of delivery, n (%) | <.001 | ||||||||||
|
|
Vaginal | 20,217 (61.9) | 76 (44.7) | 20,141 (62) |
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Vaginal vacuum | 1695 (5.2) | 8 (4.7) | 1687 (5.2) |
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Vaginal forceps | 582 (1.8) | 3 (1.8) | 579 (1.8) |
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Cesarean section | 10,151 (31.1) | 83 (48.8) | 10,068 (31) |
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| Hypertension diagnosis, n (%) | 2952 (9) | 96 (56.5) | 2856 (8.8) | <.001 | |||||||
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Chronic hypertension | ||||||||||
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|
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Without preeclampsia | 299 (1) | 16 (9.4) | 283 (0.9) |
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With preeclampsia | 284 (0.9) | 15 (8.8) | 269 (0.8) |
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Gestational hypertension | 793 (2.4) | 13 (7.6) | 780 (2.4) |
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Preeclampsia | ||||||||||
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|
Mild | 582 (1.8) | 26 (15.3) | 556 (1.7) |
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Severe | 828 (2.5) | 18 (10.6) | 810 (2.5) |
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Unspecified | 166 (0.5) | 8 (4.7) | 158 (0.5) |
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aBMI: weight in kilograms divided by the square of height in meters.