Table 1 Maternal Characteristics and the analysis results of logistic regression
From: Establishment of a model for predicting preterm birth based on the machine learning algorithm
Variables | Non-preterm birth(N = 4778) | Preterm birth(N = 633) | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|---|---|
P | OR (95%CI) | P | OR (95%CI) | |||
Parity | 1.37 ± 0.68 | 1.49 ± 0.80 | 0.23 | 0.88(0.71~1.09) | ||
Number of neck loops | 0.38 ± 0.57 | 0.29 ± 0.53 | 0.15 | 0.83(0.64~1.07) | ||
Parturient woman age | 0.02 | 1.59(1.07~2.38) | 0.05 | 1.48(1.00~2.19) | ||
< 20 or > 35 | 453(79.3%) | 118(20.7%) | ||||
≥ 20 and ≤ 35 | 4325(89.4%) | 515(10.6%) | ||||
Abortion | 0.63 | 0.87(0.50~1.52) | ||||
≥ 3 or adverse pregnancy history was 1 | 245(82.5%) | 52(17.5%) | ||||
<3 | 4533(88.6%) | 581(11.4%) | ||||
Placenta previa | <0.01 | 4.62(1.86~11.52) | <0.01 | 4.24(1.72~10.44) | ||
Yes | 21(30%) | 49(70%) | ||||
No | 4757(89.1%) | 584(10.9%) | ||||
Preterm premature rupture of membranes | <0.01 | 172.36(103.14~288.06) | <0.01 | 164.76(99.06~274.03) | ||
Yes | 21(6.7%) | 291(93.3%) | ||||
No | 4757(93.3%) | 342(6.7%) | ||||
Hypertension | 0.99 | 0.99(0.48~2.08) | ||||
Yes | 108(73.5%) | 39(26.5%) | ||||
No | 4670(88.7%) | 594(11.3%) | ||||
Diabetes | 0.05 | 1.46(1.00~2.14) | 0.08 | 1.41(0.96~2.05) | ||
Yes | 448(75.3%) | 147(24.7%) | ||||
No | 4330(89.9%) | 486(10.1%) | ||||
Multiple pregnancies | <0.01 | 40.76(21.57~77.04) | <0.01 | 41.90(22.91~76.63) | ||
Yes | 21(12.4%) | 148(87.6%) | ||||
No | 4757(90.7%) | 485(9.3%) | ||||
Abnormal fetal position | <0.01 | 2.58(1.72~3.85) | <0.01 | 2.63(1.76~3.91) | ||
Yes | 247(60.2%) | 163(39.8%) | ||||
No | 4531(90.6%) | 470(9.4%) | ||||
Prenatal hemorrhage | <0.01 | 6.52(3.59~11.84) | <0.01 | 6.67(3.68~12.09) | ||
Yes | 47(26.3%) | 132(73.7%) | ||||
No | 4731(90.4%) | 501(9.6%) | ||||
Uterine abnormalities | 0.38 | 1.95(0.44~8.69) | ||||
Yes | 8(61.5%) | 5(38.5%) | ||||
No | 4770(88.4%) | 628(11.6%) | ||||
Scar uterus | <0.01 | 3.82(2.63~5.54) | <0.01 | 3.55(2.52~5.00) | ||
Yes | 391(71.7%) | 154(28.3%) | ||||
No | 4387(90.2%) | 479(9.8%) | ||||
Pregnancy complicated with uterine fibroids | 0.30 | 0.73(0.41~1.31) | ||||
Yes | 280(81.6%) | 63(18.4%) | ||||
No | 4498(88.8%) | 570(11.2%) | ||||
Fetal distress | 0.89 | 1.03(0.72~1.46) | ||||
Yes | 273(90.1%) | 30(9.9%) | ||||
No | 4372(88.3%) | 582(11.7%) | ||||
Doubt | 133(86.4%) | 21(13.6%) | ||||
Colonization of Streptococcus agalactiae | 0.04 | 0.48(0.25~0.95) | 0.04 | 0.49(0.25~0.95) | ||
Yes | 380(94.5%) | 22(5.5%) | ||||
No | 4398(87.8%) | 611(12.2%) | ||||
Amniotic fluid traits | 0.01 | 0.55(0.36~0.85) | 0.01 | 0.56(0.37~0.87) | ||
Abnormality | 968(94.8%) | 53(5.2%) | ||||
No abnormality | 3810(86.8%) | 580(13.2%) | ||||
Abnormal amniotic fluid volume | 0.35 | 1.27(0.77~2.10) | ||||
No | 4607(88.5%) | 596(11.5%) | ||||
Too little | 160(83.3%) | 32(16.7%) | ||||
Too much | 11(68.8%) | 5(31.3%) | ||||
Anemia | 0.40 | 1.19(0.80~1.76) | ||||
Yes | 479(80.1%) | 119(19.9%) | ||||
No | 4299(89.3%) | 514(10.7%) | ||||
Assisted pregnancy | 0.68 | 0.89(0.52~1.54) | ||||
Yes | 253(71.7%) | 100(28.3%) | ||||
No | 4525(89.5%) | 533(10.5%) | ||||
Fetal weight abnormality | <0.01 | 4.89(4.01~5.96) | <0.01 | 4.92(4.04~5.98) | ||
Normal | 4529(93.5%) | 317(6.5%) | ||||
Macrosomia | 191(90.5%) | 20(9.5%) | ||||
Low body weight baby | 58(16.4%) | 296(83.6%) | ||||