Use of oral contraceptives is associated with an increased risk for
depressive and other psychiatric symptoms in young women, new research
shows.
A large prospective cohort study showed that individuals who took oral
contraceptive
pills (OCPs) reported experiencing more crying, eating problems, and
hypersomnia compared to their counterparts who did not take OCPs.
Such symptoms, the investigators note, can affect quality of life and
can lead to nonadherence, potentially resulting in an unwanted
pregnancy.
Dr Hadine Joffe
It is important to monitor for depressive symptoms in these teens,
study investigator Hadine Joffe, MD, executive director, Connors Center
for Women’s Health and Gender Biology, Brigham and Women’s Hospital,
Harvard Medical School, Boston, Massachusetts, told
Medscape Medical News.
“Young women should know that if they have a mood issue when on the
Pill, it can be addressed so it doesn’t interfere with their
functioning, with their relationships and their schoolwork or their
ability to take the medicine, if that’s the treatment of choice,” she
added.
Joffe suggested that young, sexually active teens need to be made aware of alternatives to oral contraception.
The study was
published online October 2 in
JAMA Psychiatry.
A Reproductive Right
Many teens and young women are sexually active, and their access to
birth control is “an important reproductive right,” said Joffe.
Discussions about contraceptive choice should include information
regarding the risks and benefits of the various options. Benefits of
OCPs include period regulation, control of painful periods, and
prevention of unwanted pregnancy. Potential risks include worsening mood
and, although rare in young people, blood clots and
increased blood pressure.
Researchers used data on 1010 persons from the Tracking Adolescents’
Individual Lives Survey (TRAILS), a Dutch population survey that
investigates the psychological, social, and physical development of
adolescents.
Study participants were recruited from primary schools. Participants
underwent a baseline assessment; the mean age of the participants at the
time of baseline assessment was 11 years. Follow-up assessments were
conducted at median ages of 13, 16, 19, 22, and 25 years. For all
follow-up assessments, retention rates were 80% or higher.
The study included girls and young women aged 16 to 25 years. On at
least one occasion during the study period, each participant filled out a
form that assessed use of oral contraceptives and depressive symptoms.
Researchers used well-validated instruments to assess
depression.
For participants aged 16 years, the researchers used the
DSM-IV–oriented affective problems scale of the Youth Self-Report, a
version of the Child Behavior Checklist.
At ages 19, 22, and 25 years, the investigators used a scale that
includes two additional items: indecisiveness and feeling unable to
succeed.
The researchers conducted all analyses both with and without adjusting for age, socioeconomic status, and ethnicity.
As a whole, OCP use was not associated with higher adjusted mean
scores on depressive symptoms (β coefficient, 0.006; 95% confidence
interval [CI], -0.013 to 0.025;
P = .52).
Age Dependent
However, at age 16, girls who used OCPs had higher depressive symptom
scores compared to those who did not use OCPs (mean score, 0.40 vs
0.33; β coefficient, 0.075; 95% CI, 0.033 – 0.120;
P < .001).
For participants in this age group, compared to nonuse of OCPs, OCP
use was associated with more crying (odds ratio [OR], 1.89; 95% CI, 1.38
– 2.58;
P < .001), eating problems (OR, 1.54; 95% CI, 1.13 – 2.10;
P = .009), and hypersomnia (OR, 1.68; 95% CI, 1.14 – 2.48;
P = .006).
“This study showed that these girls ― whose brains are still
developing, so they’re at a different state than a 22-year-old or
25-year-old ― appear to have more of a connection with these mood
symptoms than the girls who aren’t on the Pill,” said Joffe.
Anhedonia and sadness, which are symptoms required for the diagnosis
of depression, were unaffected. The authors note that in contrast to
adult depression, the diagnosis of which focuses more on anhedonia, the
emphasis in teen depression is more on vegetative or physical
disturbances, such as loss of energy, as well as changes in weight,
appetite, and sleep.
For 16-year-old girls, the association was weakened after adjusting
for depressive symptoms before use of OCPs, but the findings remained
significant. This suggests that the relationship between OCP use and
depressive symptoms could be bidirectional.
“Because of the way the study was designed, we can’t determine that
the Pill caused the depressive symptoms,” said Joffe. “But based on the
kind of analysis we did, it looks like the relationship goes both ways,
that people who had more mood symptoms earlier in their teen years were
more likely to be on the Pill when they were 16, and vice versa; girls
who were on the Pill at age 16 were more likely to have mood symptoms.”
The authors pointed to a previous study that showed that worsening of
mood among individuals using OCPs was more likely in users who had a
history of depression.
The use of OCPs affects hormone levels, including levels of androgens
and stress hormones. Some women may be particularly sensitive to the
hormonal fluctuations in these contraceptives.
As well, important emotion-related regions of the brain, such as the
amygdala, the prefrontal cortex, and the hippocampus, are still maturing
during adolescence.
“Teens are dealing with lots of issues, which makes them more
sensitive to many things they take that affect their body and their
brain,” said Joffe.
IUDs a Better Choice for Teens?
The researchers investigated whether the association between OCP use
and depressive symptoms may be explained by preexisting differences.
For instance, 16-year-old OCP users were more sexually active and
experienced more stressful events, as well as more menstruation-related
pain and
acne,
than their counterparts in the nonuser group. Analyses showed that all
these factors weakened the association, although none diminished it.
The researchers wondered what role, if any, the “healthy survivor
effect” played. Women who experience psychological adverse effects may
be more likely to discontinue oral contraceptives, which could lead to
an underestimation of the association between OCP use and depressive
symptoms.
Comparing only first-time OCP users to nonusers strengthened the
association between OCP use and depressive symptoms for the whole cohort
(β coefficient for first-time OCP use, 0.021; 95% CI, -0.005 to 0.046;
P = .11).
“This means that if you remove the group who took the Pill before and
maybe went off it because of a side effect, it looks like the pattern
was still evident, and the association was even stronger,” said Joffe.
Clinicians should be aware that adolescents who use OCPs may have
mood problems, the authors note. Teens may attribute their depressive
symptoms to the contraceptives and stop taking them, which could result
in an unwanted pregnancy.
To lower this risk, long-acting reversible contraceptives, such as
intrauterine devices (IUDs), are recommended as a first-line option. “We
definitely encourage consideration of other means of birth control” in
this age group, said Joffe.
An advantage of the IUD is that after it is inserted, it can be left
in for many years and “doesn’t rely on somebody taking something like a
pill consistently and reliably,” she said.
The investigators do not recommend limiting OCP use to counterbalance
the risk for depressive symptoms. They point out that OCPs have
benefits, including beneficial effects on
dysmenorrhea and premenstrual syndrome, and are much safer than pregnancy and associated
postpartum depression risks.
This new longitudinal analysis does not provide information about
specific OCPs. However, the researchers checked which OCPs were used in a
comparable cohort of girls born in the same year and whose addresses
included the same postal code as the girls in this study. They found
most of these persons were using the same type of progestin.
It is unclear whether the findings are generalizable to the US
population, owing to the differences in the acceptability of, and access
to, contraception. For example, unlike Dutch teens, not all US teens
have access to no-cost contraception, the authors note.
Definite Correlation
Commenting for
Medscape Medical News, Maureen Sayres Van Niel,
MD, who is president of the Women’s Caucus of the American Psychiatric
Association and is a reproductive psychiatrist in Cambridge,
Massachusetts, described the study as “important” and “well done.”
“This study collected data over a long period of time, which is exactly the kind of data we need,” she said.
Scandinavian countries and the Netherlands “are better able to do
these kinds of studies than the US because they have every person’s
medical data on record, beginning at birth and continuing until death,”
said Van Niel.
Previous “excellent” studies ― one from Sweden and one from Denmark ―
showed a “definite correlation” between use of hormonal contraceptives
and depression and antidepressant use later in life, said Van Niel. She
noted that this new analysis is different in that it assessed the
occurrence of depressive symptoms while girls were actually taking oral
contraceptives.
Van Niel agreed that the new results don’t mean that teenage girls
should not use OCPs. She noted that the overall incidence of depression
in young persons who use OCPs is “still low.”
Van Niel said that although sexually active girls need effective
contraception, in her experience, “they are less likely to use a nonoral
form of contraceptive that older women use, such as the ring or IUD.”
Some vulnerable young girls may be predisposed to depressive symptoms
and may be particularly sensitive to hormonal fluctuations, said Van
Niel. Researchers are working on genetic markers and biomarkers to
identify such susceptible individuals, she said.
TRAILS has been financially supported by the Netherlands
Organization for Scientific Research NOW, the Dutch Ministry of Justice,
the European Science Foundation, the European Research Council, the
European Science Foundation, Biobanking and Biomolecular Resources
Research Infrastructure BBMRI-NL, the Gratama Foundation, the Jan Dekker
Foundation, participating universities, and the Accare Center for Child
and Adolescent Psychiatry. The authors’ relevant financial
relationships are listed in the original article. Van Niel has disclosed
no such financial relationships.
JAMA Psychiatry. Published online October 2, 2019.
Full text
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