BALTIMORE — Poor prenatal sleep may increase the risk of postpartum depression, and prenatal depression may reduce the likelihood of mothers coming to their prenatal appointments, according to research presented at the annual clinical and scientific meeting of the American College of Obstetricians and Gynecologists.
Together, the two studies suggest that commonly overlooked experiences in the prenatal period can have negative effects down the line if clinicians aren’t asking patients about them and addressing the issue.
“I think the national conversation around mental health in general will hopefully carry us forward to better supporting the patients who are coming in with preexisting conditions,” lead author Minnie Jang, a 4th-year medical student at Johns Hopkins University, Baltimore, said in an interview.
Most of the attention on mood disorders of pregnancy focus on the postpartum period, but preexisting or new-onset depression during pregnancy deserves more attention, Ms. Jang told attendees. ACOG recommends that clinicians screen all patients at least once during the perinatal period, but that could be anywhere from early pregnancy to the postpartum period. Ms. Jang would like to see recommendations addressing both early pregnancy and the postpartum period.
“I think there’s this framing that postpartum depression is a distinct entity from other mental health conditions whereas it’s really part of a continuum,” Ms. Jang said in an interview.
She retrospectively analyzed the medical records of all pregnant women who completed the Edinburgh Postnatal Depression Scale (EPDS) during their first or second trimesters between 2002 and 2021 at Johns Hopkins Hospital. Among the 718 women who were screened in early pregnancy, 44.6% were Black or African American, 39.7% were white, and 15.7% were of a different race. Nearly all (94%) were not Hispanic/Latino.
Most (59%) were partnered, employed (68%), and had private insurance (58%). Only 7% used tobacco while 11% used alcohol and 6% used illicit drugs.
Twelve percent of the patients scored positive for depression, with a score of at least 10 or an affirmative answer to question 10 regarding self-harm. These women tended to be younger (P = .034), with an median age of 28 at their first visit versus 31 for those who screened negative, and were more likely to be publicly insured (P = .013) and without a partner (P = .005).
Patients who screened positive were more likely to have a history of substance use or history of a previous psychiatric diagnosis (P < .0001 for both). In addition, more patients who screened positive (49%) than those who screened negative (26%) had fetal complications (P < .001).
“There are some interesting subgroups of patients who are screening positive for depressive symptoms early on in pregnancy,” Ms. Jang said. Some come into pregnancy with preexisting mental health conditions while others have situational depressive symptoms, such as the subgroup referred to social work who had diagnosed fetal complications, she said. “Then there’s a whole other group of patients who are developing new symptoms during pregnancy.”
Patients who screened positive tended to start prenatal care later, at a median 12.3 weeks gestational age, than patients who screened negative, at a median 10.7 weeks gestational age (P = .002), the analysis found.
The number of routine prenatal care visits did not significantly differ between those who screened positive and those who screened negative, but patients with positive depression screens were almost half as likely to complete glucose tolerance testing (odds ratio, 0.6) or group B streptococcus testing (OR, 0.56) after adjusting for insurance status, gravidity, and gestational age at the patient’s first visit.
The researchers also identified a significant positive association between higher EPDS scores and the number of labor and delivery triage visits (P = .006). There were no significant differences in the rates of Tdap vaccination or screening for sexually transmitted infections between the two groups.
Poor sleep linked to later depression
The other study was prospective, using data from the PATCH Prenatal Care and Maternal and Child Health Outcomes study, which initially “compared health outcomes and satisfaction with prenatal care between patients receiving Centering Pregnancy group prenatal care and patients receiving traditional prenatal care,” the authors explained. This secondary analysis looked at sleep problems and postpartum depression.
“We don’t routinely ask patients about sleep or screen patients for sleeping issues,” lead author Carolyn Sinow, MD, a 4th-year resident at Kaiser Permanente Santa Clara (Calif.) Medical Center, said in an interview. “I think that we need to take sleep complaints more seriously overall, especially in early pregnancy.” While sleep problems in the third trimester often have more to do with discomforts from pregnancy itself, better sleep “in the first and second trimester is something we can really target with good sleep hygiene,” she added.
The 336 pregnant participants were recruited from Health Connect as long as they had a singleton pregnancy, were receiving prenatal care from Kaiser Permanente Northern California, and completed baseline questionnaires about their sleep and depression and anxiety symptoms during their first trimester between August 2020 and April 2021. Those with clinical depression or a high-risk pregnancy were excluded. The participants then completed the questionnaires again between 4 and 8 weeks post partum.
After adjusting for baseline depression and potential confounders, patients with poor sleep quality, indicated by a score greater than 5 on the Pittsburgh Sleep Quality Index (PSQI), were 12% more likely to develop postpartum depression, indicated by a score on the Patient Health Questionnaire depression scale (PHQ-8) of 10 or greater (relative risk, 1.12; 95% confidence interval, 1.01-1.25).
The two aspects of sleep that specifically correlated with postpartum depression were sleep quality and sleep latency, or taking a long time to fall asleep. Those reporting poor sleep quality were twice as likely to develop postpartum depression (relative risk, 2.18; 95% CI, 1.22-3.91), and those who took a while to fall asleep were 52% more likely to develop postpartum depression (RR, 1.52; 95% CI, 1.06-2.17).
Though the study also found prenatal sleep problems correlated with higher postpartum anxiety scores on the General Anxiety Disorder scale (GAD-7), the results were not statistically significant.
Kathleen Morrell, MD, MPH, an ob.gyn. in New York, was not involved in the study and said she was surprised it wasn’t something that had been studied much before because it makes sense.
“I always like it when studies confirm what we think should make sense, so it’s nice to see it,” Dr. Morrell said in an interview. “I think anytime you put something out, research it, and define it with numbers for doctors, that sometimes allows us to [realize], ‘Oh, that’s probably something we should be paying more attention to, especially if we have available treatments for it,’” she added.
“The clinical takeaway is that we really need to be screening for sleep pattern disruptions early in pregnancy, because even though it makes logical sense, it might not be something on our radar to think about,” Dr. Morrell said. “If people aren’t sleeping, well, their mental health is negatively affected.”
The most promising therapy for sleep issues currently is cognitive-behavioral therapy, which can accessed through various apps, Dr. Sinow said in an interview. “There are also safe interventions, such as melatonin and Unisom, that are totally safe in pregnancy that we can use to target sleep in early pregnancy.”
Dr. Morrell added that vitamin B6, often taken for nausea and vomiting during pregnancy, can also sometimes help people sleep and is safe during pregnancy.
“We know that postpartum depression does not necessarily only have a negative effect on the mother, but also has a negative effect on the infant and the family dynamic as well,” Dr. Morrell said. “So, we should be looking and screening for it so that we can offer people potential treatment because we know it can have long-term effects.”
Ms. Jang and Dr. Sinow did not have any disclosures. Dr. Morrell has done training for Nexplanon. Neither study noted external funding.
This story originally appeared on MDedge.com, part of the Medscape Professional Network.
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