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Table 1 Characteristics of the study population in the second trimestera

From: Vitamin D status affects the relationship between lipid profile and high-sensitivity C-reactive protein

Characteristics All(n = 2479) 25(OH)D ≥ 50 nmol/L(n = 604) 25(OH)D<50 nmol/L(n = 1875)
Mean ± SD or n(%) Mean ± SD or n(%) Mean ± SD or n(%)
25(OH)D status 40.1 ± 16.7 63.2 ± 13.0 32.6 ± 9.1
Sociodemographic characteristics
 Maternal age(years) 29.3 ± 4.2 29.2 ± 4.1 29.3 ± 4.2
 Maternal education(< 9 years) 974(39.3) 212(35.1) 675(36.0)
 Maternal income(< 4000 RMB yuan/month) 1657(66.8) 403(66.7) 1254(66.9)
 Entered in summer or autumn 1280(51.6) 257(42.5) 942(50.2)*
Perinatal health status
 Pre-pregnancy BMI(kg/m2) 21.2 ± 2.8 21.0 ± 2.7 21.3 ± 2.8*
 BMI(kg/m2) 24.2 ± 2.9 23.8 ± 2.7 24.3 ± 2.9*
 Systolic blood pressure(mmHg) 109.8 ± 9.5 109.5 ± 9.9 109.9 ± 9.4
 Diastolic blood pressure(mmHg) 68.7 ± 7.6 68.6 ± 8.8 68.7 ± 7.3
 Blood glucose 4.6 ± 0.4 4.6 ± 0.4 4.6 ± 0.4
 Multipara 1049(42.3) 264(43.7) 785(41.9)
Diet and Lifestyle
 Sedentary time(≥4 h/day) 1773(71.5) 409(67.7) 511(27.3)*
 Physical activities(<3 days/week) 1453(58.6) 351(58.1) 1102(58.8)
 Paternal alcohol consumption(no times/week) 1647(66.4) 409(67.7) 1238(66.0)
 Paternal smoking(≤6 cigarettes/day) 1980(79.9) 481(79.6) 1499(79.9)
 fish oil supplement(≤3 times/week) 2420(97.6) 573(94.9) 1874(98.5)*
 multivitamin supplement(≤3 times/week) 2264(91.3) 495(82.0) 1769(94.3)*
 Milk intake(≥3 times/week) 1417(57.2) 375(62.1) 1042(55.6)*
 Soy product intake(≥3 times/week) 1146(46.2) 293(48.5) 853(45.5)
 Dessert intake(≥3 times/week) 442(17.8) 88(14.6) 354(18.9)*
Laboratory testing indicators
 Hs-CRP(mg/L) 3.0 ± 2.1 2.7 ± 1.8 3.1 ± 2.1
 TC(mmol/L) 6.0 ± 1.0 5.8 ± 1.0 6.0 ± 1.0
 TG(mmol/L) 2.6 ± 1.0 2.5 ± 1.0 2.6 ± 1.0
 HDL-C(mmol/L) 2.0 ± 0.4 2.0 ± 0.3 2.0 ± 0.4
 LDL-C(mmol/L) 2.8 ± 0.7 2.8 ± 0.7 2.9 ± 0.7
  1. a.25(OH)D 25-Hydroxyvitamin D; hs-CRP High-sensitivity C-reactive protein; TC Total cholesterol; TG triglyceride; HDL-C High-density lipoprotein-cholesterol; LDL-C Low-density lipoprotein-cholesterol; * Indicates P < 0.05