Skip to main content

Table 2 Distribution of maternal demographic characteristics (N = 23,394)

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

Maternal

Characteristic

25(OH)D status (nmol/L)

χ2/H

P- value

 

< 50

(N = 15,696)

50–75

(N = 6981)

> 75

(N = 717)

Total

(N = 23,394)

 

Maternal Age(years)

    

59.154

<.001*

<24b

456(2.90)

178(2.50)

8(1.10)

642(2.70)

 

25-29a

6894(43.90)

2807(40.20)

286(39.90)

9987(42.70)

 

30-34ab

6319(40.30)

2928(41.90)

294(41.00)

9541(40.80)

 

≥35ac

2027(12.90)

1068(15.30)

129(18.00)

3224(13.80)

 

Pre-pregnancy BMI (kg/m2)

    

141.771

<.001*

< 18.5abc

1932(12.30)

1037(14.90)

170(23.70)

3139(13.40)

 

18.5–23.9bc

11,448(72.90)

5142(73.70)

493(68.80)

17,083(73.00)

 

≥24abc

2316(14.80)

802(11.50)

54(7.50)

3172(13.60)

 

Season of blood collection

    

397.256

<.001*

Spring

4087(26.00)

1620(23.20)

171(23.8)

5878(25.10)

 

Summer

3268(20.80)

2055(29.40)

229(31.9)

5552(23.70)

 

Autumn

3835(24.40)

1928(27.60)

221(29.4)

5974(25.50)

 

Winter

4506(28.70)

1378(19.70)

106(14.8)

5990(25.60)

 

No. of previous pregnancies

    

14.132

.007*

0

10,251(63.50)

4433(63.50)

451(62.90)

15,135(64.70)

 

1

3817(24.30)

1732(24.80)

173(24.10)

5722(24.50)

 

2

1628(10.40)

816(11.70)

93(13.00)

2537(10.80)

 

Male fetus

8033(51.20)

3649(52.30)

381(53.10)

12,306(51.60)

3.040

.219*

Family history of diabetes

1314(8.40)

579(8.30)

56(7.80)

1914(8.33)

.301

.860*

Family history of thyroid disease

3

7

0

Maternal Age(years) (Mean ± SD)ab

30.30 ± 3.64

30.64 ± 3.70

30.93 ± 3.69

30.42 ± 3.66

58.510

<.001#

Pre-pregnancy BMI (kg/m2) (Mean ± SD)abc

21.23 ± 2.77

20.87 ± 2.62

20.15 ± 2.25

21.09 ± 2.72

58.643

<.001#

  1. * chi-square test; # Kruskal—Wallis H-test; Multiple comparison were 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;