scholarly journals The association of vitamin D status and supplementation during pregnancy with gestational diabetes mellitus: a Chinese prospective birth cohort study

2019 ◽  
Author(s):  
Wan-jun Yin ◽  
Rui-xue Tao ◽  
Hong-lin Hu ◽  
Ying Zhang ◽  
Xiao-min Jiang ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Vitamin D ◽  
Cohort Study ◽  
Glucose Metabolism ◽  
Pregnant Women ◽  
Vitamin D Supplementation ◽  
Birth Cohort Study ◽  
Vitamin D Status ◽  
Prospective Birth Cohort ◽  
Prospective Birth Cohort Study

ABSTRACT Background Previous studies have shown conflicting findings regarding the relation of vitamin D status and supplementation during pregnancy with gestational diabetes mellitus (GDM). Most of these studies hypothesized that 25-hydroxyvitamin D [25(OH)D] concentrations were associated with GDM risk and glucose metabolism based on linear association models. Objectives We aimed to estimate the associations of 25(OH)D concentrations and vitamin D supplementation with GDM risk and glucose metabolism and determine the threshold concentrations of 25(OH)D that could significantly affect glucose metabolism and GDM risk. Methods In a prospective birth cohort study, we collected information about sociodemographic characteristics, health status, and lifestyle from 4984 pregnant women. Vitamin D supplementation and 25(OH)D concentrations were assessed in the second trimester. Data from the 75-g oral-glucose-tolerance test were obtained at 24–28 weeks of gestation. Results A total of 922 (18.5%) women were diagnosed with GDM. Compared with women with 25(OH)D concentrations <25 nmol/L, the GDM risk was significantly lower in women with 25(OH)D concentrations ranging from 50 to 75 nmol/L (RR: 0.74; 95% CI: 0.58, 0.95) and >75 nmol/L (RR: 0.40; 95% CI: 0.22, 0.70). The curve-fitting models suggested a significant large reduction in GDM risk, fasting plasma glucose, and area under the curve of glucose with increasing 25(OH)D concentrations only for concentrations >50 nmol/L. Consistently, GDM risk was significantly reduced only in women who took 400–600 IU vitamin D/d (RR: 0.83; 95% CI: 0.70, 0.97) with a mean 25(OH)D concentration of 50 nmol/L but not in women taking vitamin D sometimes with a mean 25(OH)D concentration of 40 nmol/L. Conclusions GDM risk was significantly reduced only in pregnant women with 25(OH)D concentrations >50 nmol/L. Pregnant women taking 400–600 IU vitamin D/d with mean 25(OH)D concentrations of 50 nmol/L had a lower risk of GDM.

Early-life vitamin D status and bone mass at five years in a prospective birth cohort study

2017 ◽  
Author(s):  
Carol ni Chaoimh ◽  
Deirdre Murray ◽  
Louise Kenny ◽  
Alan Irvine ◽  
Jonathan Hourihane ◽  
...  
Keyword(s):  
Vitamin D ◽  
Cohort Study ◽  
Bone Mass ◽  
Birth Cohort ◽  
Early Life ◽  
Birth Cohort Study ◽  
Vitamin D Status ◽  
Prospective Birth Cohort ◽  
Prospective Birth Cohort Study

Infant anthropometry, early life infection, and subsequent risk of type 1 diabetes mellitus: a prospective birth cohort study

2011 ◽  
Vol 12 (4pt1) ◽  
pp. 313-321 ◽  
Author(s):  
Anne-Louise Ponsonby ◽  
Angela Pezic ◽  
Jennifer Cochrane ◽  
Fergus J Cameron ◽  
Mark Pascoe ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Cohort Study ◽  
Type 1 Diabetes Mellitus ◽  
Early Life ◽  
Birth Cohort Study ◽  
Prospective Birth Cohort ◽  
Prospective Birth Cohort Study ◽  
Subsequent Risk

scholarly journals The role of parathyroid hormone during pregnancy on the relationship between maternal vitamin D deficiency and fetal growth restriction: a prospective birth cohort study

2020 ◽  
Vol 124 (4) ◽  
pp. 432-439
Author(s):  
Deng-Hong Meng ◽  
Ying Zhang ◽  
Shuang-Shuang Ma ◽  
Hong-Lin Hu ◽  
Jing-Jing Li ◽  
...  
Keyword(s):  
Vitamin D ◽  
Cohort Study ◽  
Parathyroid Hormone ◽  
Birth Weight ◽  
Fetal Growth ◽  
Birth Cohort Study ◽  
Maternal Vitamin ◽  
The Relationship ◽  
Prospective Birth Cohort ◽  
Prospective Birth Cohort Study

AbstractPrevious studies have shown conflicting findings regarding the relationship between maternal vitamin D deficiency (VDD) and fetal growth restriction (FGR). We hypothesised that parathyroid hormone (PTH) may be an underlying factor relevant to this potential association. In a prospective birth cohort study, descriptive statistics were evaluated for the demographic characteristics of 3407 pregnancies in the second trimester from three antenatal clinics in Hefei, China. The association of the combined status of vitamin D and PTH with birth weight and the risk of small for gestational age (SGA) was assessed by a multivariate linear and binary logistic regression. We found that declined status of 25-hydroxyvitamin D is associated with lower birth weight (for moderate VDD: adjusted β = −49·4 g, 95 % CI −91·1, −7·8, P < 0·05; for severe VDD: adjusted β = −79·8 g, 95 % CI −127·2, −32·5, P < 0·01), as well as ascended levels of PTH (for elevated PTH: adjusted β = −44·5 g, 95 % CI −82·6, −6·4, P < 0·05). Compared with the non-VDD group with non-elevated PTH, pregnancies with severe VDD and elevated PTH had the lowest neonatal birth weight (adjusted β = −124·7 g, 95 % CI −194·6, −54·8, P < 0·001) and the highest risk of SGA (adjusted risk ratio (RR) = 3·36, 95 % CI 1·41, 8·03, P < 0·01). Notably, the highest risk of less Ca supplementation was founded in severe VDD group with elevated PTH (adjusted RR = 4·67, 95 % CI 2·78, 7·85, P < 0·001). In conclusion, elevated PTH induced by less Ca supplementation would further aggravate the risk of FGR in pregnancies with severe VDD through impaired maternal Ca metabolism homoeostasis.

scholarly journals Gene-vitamin D interactions on food sensitization: a prospective birth cohort study

Allergy ◽  
2011 ◽  
Vol 66 (11) ◽  
pp. 1442-1448 ◽  
Author(s):  
X. Liu ◽  
G. Wang ◽  
X. Hong ◽  
D. Wang ◽  
H.-J. Tsai ◽  
...  
Keyword(s):  
Vitamin D ◽  
Cohort Study ◽  
Birth Cohort ◽  
Birth Cohort Study ◽  
Food Sensitization ◽  
Prospective Birth Cohort ◽  
Prospective Birth Cohort Study
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