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A comparative study of hormonal contraceptive use and vitamin D levels at Gondar Town 2023.

Scientific reports
January 1, 1970
Elias Chane et al. (8 authors)
Journal ArticleComparative StudyHuman Study
Study Details

Study Goal

The researchers aimed to explore the relationship between hormonal contraceptive use and vitamin D levels, assessing whether contraceptive types influence vitamin D deficiency prevalence.

Results Summary

Combined oral contraceptive (COC) users had significantly higher mean serum vitamin D levels (31.90 ng/ml) compared to Norplant (24.08 ng/ml), DMPA (24.83 ng/ml), and non-users (22.00 ng/ml). COC use reduced the odds of vitamin D deficiency by 90%, while higher education, lack of fish consumption, and no vitamin D supplementation increased deficiency risk.

Population

162 women using hormonal contraceptives (Norplant, DMPA, COC) and 162 age- and BMI-matched non-users in Gondar town, Ethiopia.

Effective Dosage

Not specified

Duration

Data collected from February to April 2023 (cross-sectional, no intervention duration specified).

Interactions

None mentioned

Extracted Claims (15)
InterventionDirectionEndpointPopulationDosageImpactClaim #
combined oral contraceptives (COC)
decrease
vitamin D deficiency
participants
by 90%
shown to reduce the odd of having
#1
combined oral contraceptives (COC)
increase
Vitamin D levels
users of combined oral contraceptives (COC)
-
had significantly higher mean serum
#2
combined oral contraceptives (COC)
increase
users of Norplant and DMPA, as well as non-users
users of combined oral contraceptives (COC)
-
had significantly higher mean serum Vitamin D levels compared to
#3
combined oral contraceptives (COC)
decrease
Vitamin D deficiency
COC users compared to non-users
-
The prevalence of Vitamin D deficiency was lower among
#4
combined oral contraceptives (COC)
decrease
Vitamin D deficiency
-
-
highlighting a potential protective effect of
#5
Norplant
neutral
Vitamin D levels
Norplant users
24.08 (± 5.17)
mean serum Vitamin D levels of
#6
DMPA
neutral
Vitamin D levels
DMPA users
24.83 (± 5.52)
mean serum Vitamin D levels of
#7
combined oral contraceptives (COC)
neutral
Vitamin D levels
COC users
31.90 (± 6.94)
mean serum Vitamin D levels of
#8
-
neutral
Vitamin D level
control group
22.00 (± 7.97)
control group has mean
#9
hormonal contraceptives
neutral
Vitamin D deficiency
hormonal contraceptive users
21.6% (35/162)
the prevalence of Vitamin D deficiency among
#10
-
neutral
vitamin D deficiency
non-user controls
48.14% (78/162)
non-user controls had
#11
higher education
increase
Vitamin D deficiency
participants
-
The odds of having Vitamin D deficiency was higher among participants who attained
#12
never eat fish
increase
Vitamin D deficiency
participants
-
The odds of having Vitamin D deficiency was higher among participants who
#13
never been used vitamin D Supplements
increase
Vitamin D deficiency
participants
-
The odds of having Vitamin D deficiency was higher among participants who have
#14
normal and hypercalcemia state
decrease
Vitamin D deficiency
individuals
-
shown to have lower odd of having
#15
Abstract

Vitamin D deficiency is an emerging public health problem globally, with devastating health consequences. Some studies suggest that exogenous sex hormones, found in hormonal contraceptives, may enhance vitamin D levels. However, the reasons for this association are not fully understood, as women using hormonal contraception may have different lifestyle habits affecting their vitamin D status. Therefore, this study seeks to explore the relationship between hormonal contraceptive use and vitamin D levels. A Facility based comparative cross-sectional study was conducted in Gondar town from February to April 2023, involving a total of 162 women using three types of hormonal contraceptives (Norplant, DMPA, and COC) and 162 age and BMI-matched non-users as controls in a 1:1 ratio. Participants were selected using systematic random sampling. A semi-structured questionnaire was used to collected data regarding the socio-demographic, economic, obstetric, lifestyle, and clinical information. 5 milliliters of blood samples were collected from each participant for Laboratory analysis of serum vitamin D, calcium, and alkaline phosphates using a Beckman Coulter chemistry analyzer. Independent t-tests, ANOVA with post hoc Bonferroni test was used to compare statistics between the two groups, and logistic regression models to identify factors associated with Vitamin D deficiency. The mean serum Vitamin D levels of Norplant, DMPA, and COC users were 24.08 (± 5.17), 24.83 (± 5.52), and 31.90 (± 6.94) respectively; whereas control group has mean Vitamin D level of 22.00 (± 7.97). On the current study the prevalence of Vitamin D deficiency (< 20 ng/ml) among hormonal contraceptive users was found to be 21.6% (35/162), whereas 48.14% (78/162) of non-user controls had vitamin D deficiency. The odds of having Vitamin D deficiency was higher among participants who attained higher education, who never eat fish and have never been used vitamin D Supplements. However, the use of combined oral contraceptives (COC) shown to reduce the odd of having vitamin D deficiency by 90%. Similarly, individuals with normal and hypercalcemia state shown to have lower odd of having Vitamin D deficiency. Users of combined oral contraceptives (COC) had significantly higher mean serum Vitamin D levels compared to users of Norplant and DMPA, as well as non-users. The prevalence of Vitamin D deficiency was lower among COC users compared to non-users, highlighting a potential protective effect of COC use against Vitamin D deficiency.

Medical Subject Headings (MeSH)
HumansFemaleVitamin DAdultVitamin D DeficiencyCross-Sectional StudiesYoung AdultAdolescentContraceptive Agents, HormonalContraceptives, Oral, Hormonal
Study Links
Quality Scores
SafetyNot Assessed
Efficacy85/10
Quality75/10
Research Impact Scores
APT Score0.05
Weight Score1.28
Normalized Score0.69
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