Research Article
Previous Preterm Birth and Current Maternal Complications as a Risk Factor of Subsequent Stillbirth
Table 1
Sociodemographic characteristics of study population at the time of the second pregnancy.
| | | Stillbirtha | Live birtha | valueb | | | (%) | (%) |
| | Maternal age | | | <0.0001 | | Less than 18 years | 532 (6.11) | 52064 (4.15) | | | 18 to 35 years | 7278 (83.59) | 1115315 (88.85) | | | Above 35 years | 897 (10.30) | 87917 (7.00) | | | Maternal race | | | <0.0001 | | White | 6220 (71.91) | 1041145 (84.44) | | | Black | 2429 (28.08) | 191852 (15.56) | | | Infant sex | | | <0.0001 | | Male | 4798 (53.09) | 662673 (51.22) | | | Female | 4239 (46.91) | 631160 (48.78) | | | Maternal educational level | | | <0.0001 | | Less than 12 years | 2040 (25.10) | 247616 (19.87) | | | 12 years or more | 6086 (74.90) | 998390 (80.13) | | | Paternal educational level | | | <0.0001 | | Less than 12 years | 882 (16.05) | 135495 (13.37) | | | 12 years or more | 4613 (83.95) | 877774 (86.63) | | | Marital status | | | <0.0001 | | Married | 5361 (61.23) | 901026 (71.80) | | | Not married | 3395 (38.77) | 353932 (28.20) | | | Maternal prenatal smoking | | | <0.0001 | | Yes | 2536 (30.18) | 283699 (22.69) | | | No | 5867 (69.82) | 966767 (77.31) | | | Number of fetuses | | | <0.0001 | | Singleton | 7944 (90.48) | 1227007 (96.76) | | | Twins | 836 (9.52) | 41131 (3.24) | |
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Columns do not total due to missing data.
bSignificant values are in bold font. values of 0.05 or less were considered significant.
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