Assessment of correlation between vitamin D level and prevalence of preterm births in the population of pregnant women in Poland
Int J Occup Med Environ Health 2017;30(6) DOI: https://doi.org/10.13075/ijomeh.1896.01146
Marta Baczyńska-Strzecha 1 , Jarosław Kalinka 1
Medical University in Lodz, Łódź, Poland (Department of Perinatology, 1st Chair of Obstetrics and Gynecology)
- Preterm birth rate reduced by vitamin D – 78 percent if non-white, 39 percent if white – July 2017
- Preterm birth rate reduced by 43 percent with adequate Vitamin D supplementation – meta-analysis Feb 2017
- Preterm birth 2X more likely if poor Vitamin D Receptor, 9 X if also had previous miscarriage – June 2017
Healthy pregnancies need lots of vitamin D has the following summary
|0. Chance of not conceiving||3.4 times||Observe|
|1. Miscarriage||2.5 times||Observe|
|2. Pre-eclampsia||3.6 times||RCT|
|3. Gestational Diabetes||3 times||RCT|
|4. Good 2nd trimester sleep quality||3.5 times||Observe|
|5. Premature birth||2 times||RCT|
|6. C-section - unplanned||1.6 times||Observe|
|Stillbirth - OMEGA-3||4 times||RCT - Omega-3|
|7. Depression AFTER pregnancy||1.4 times||RCT|
|8. Small for Gestational Age||1.6 times||meta-analysis|
|9. Infant height, weight, head size |
within normal limits
|10. Childhood Wheezing||1.3 times||RCT|
|11. Additional child is Autistic||4 times||Intervention|
|12.Young adult Multiple Sclerosis||1.9 times||Observe|
|13. Preeclampsia in young adult||3.5 times||RCT|
|14. Good motor skills @ age 3||1.4 times||Observe|
|15. Childhood Mite allergy||5 times||RCT|
|16. Childhood Respiratory Tract visits||2.5 times||RCT|
RCT = Randomized Controlled Trial
Objectives: Aim of this project is determination of the correlation between the level of vitamin D in blood serum and duration of pregnancy in population in central Poland.
Material and Methods: 25-Hydroxyvitamin D (25(OH)D) level was determined in blood serum, using enzyme-linked immunosorbent assay (ELISA). Standardized history of each patient was recorded. The history included: general medical history, data regarding the course of pregnancy and information about health-related behavior that could influence vitamin D concentration. Two hundred-and-one Caucasian women at childbirth were qualified into the study. The study group was divided into 2 parts: 100 patients who had a spontaneous premature birth and 101 patients who had birth at full term.
Results: Vitamin D deficiency (< 30 ng/ml) was very common for both groups (69.6% of patients in the premature group and 72% – in the control group). Patients who had a premature birth had severe vitamin D deficiency (less than 10 ng/ml) more often than in the control group (34% vs. 14.2%, p = 0.001). Severe vitamin D deficiency increased the risk of premature birth but the association was not statistically significant in the multivariate regression model (odds ratio (OR) = 2.47, 95% confidence interval (CI): 0.86–7.15, p = 0.094).
Conclusions: Severe vitamin D deficiency (< 10 ng/ml) may be the factor increasing the risk of preterm birth.