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Table 3 Maternal outcomes stratified by maternal vitamin D status in the first trimester

From: Relationship between maternal vitamin D status in the first trimester of pregnancy and maternal and neonatal outcomes: a retrospective single center study

Maternal
Outcomes
25(OH)D status(nmol/L) χ2/F/H
P- value
  < 50
(N = 15,696)
50–74.9
(N = 6981)
≥75
(N = 717)
Total
(N = 23,394)
 
Gestational Age (weeks) (Mean±SD)a 38.9 ± 1.4 38.9 ± 1.4 38.8 ± 1.2 38.9 ± 1.4 3.327
.036&
Gestational Age(weeks) (Category)      8.023
.431*
< 28 3 0 0 3  
28–31 + 6 54(0.3) 26(0.4) 0 80(0.3)  
32–33 + 6 101(0.6) 31(0.4) 4(0.6) 136(0.6)  
34–36 + 6 692(4.4) 324(4.6) 32(4.5) 1048(4.5)  
≥37 14,846(94.6) 6600(94.5) 681(95.0) 22,127(94.6)  
Cesarean section 6715(42.8) 3028(43.4) 301(42.0) 10,044(42.9) 0.969
.616*
Premature rupture of membranes 18(0.1) 12(0.2) 0 30(0.1) 2.185
.335*
Gestational diabetesa 1680(10.7) 831(11.9) 73(10.2) 2584(11.0) 7.648
.022*
Preeclampsia 440(1.9) 162(2.3) 11(1.5) 613(2.6) 7.832
.020*
Intrahepatic cholestasis 108(0.7) 38(0.5) 8(1.1) 154(0.7) 3.894
.143*
Intrauterine infection 330(2.1) 115(1.6) 10(1.4) 455(1.9) 6.422
.040*
2-h postpartum hemorrhage(ml) 256 ± 149 255 ± 106 244 ± 84 255 ± 137 .001
.797#
  1. * chi-square test; # Kruskal—Wallis H-test; & ANOVA. Multiple comparison was adjusted with Bonferroni calculation
  2. a. Indicates significant differences between deficient group (< 50 nmol/L) and insufficient group(50 – 75 nmol/L);
  3. b. Indicates significant differences between deficient group and sufficient group(> 75 nmol/L);
  4. c. Indicates significant differences between insufficient group and sufficient group;