The factor structure of the Edinburgh Postnatal Depression Scale among perinatal high-risk and community samples in London

Unidimensional or multidimensional? Revisiting the psychometrics of PHQ-9 and EPDS using bifactor model and item response theory in 2939 Chinese perinatal women

BACKGROUND

Perinatal depression often goes undetected and untreated in low- and middle-income countries like China. Reliable screening tools can improve this situation. The Patient Health Questionnaire-9 (PHQ-9) and the Edinburgh Postnatal Depression Scale (EPDS), two widely used tools, often exhibit inconsistent factor structures, leading to debates regarding their unidimensionality versus multidimensionality and casting doubts on their psychometric properties.

METHODS

Our study aimed to assess the utility of PHQ-9 and EPDS in Chinese perinatal women and to address the debate by employing the bifactor model and item response theory (IRT). We enrolled 2939 perinatal women from a maternity and infant health hospital serving all 16 districts of Shanghai. The bifactor model was used to examine the factor structure of PHQ-9 and EPDS, while IRT analysis evaluated the psychometric properties.

RESULTS

The indices derived from the bifactor model indicated that both PHQ-9 and EPDS should be used as unidimensional measurements. All items in PHQ-9 and EPDS showed adequate discriminative ability and difficulty, but certain items require further refinement. PHQ-9 demonstrated better measurement precision at high levels of latent depression than EPDS.

LIMITATIONS

These findings might not generalize to perinatal women in impoverished areas. The absence of clinical diagnoses limited the exploration of sensitivity and specificity.

CONCLUSIONS

PHQ-9 and EPDS are effective tools for detecting depression in Chinese perinatal women and should be used as unidimensional tools. Our study expands upon existing psychometric findings related to PHQ-9 and EPDS, offering valuable insights for their application in research and clinical settings.

Prenatal Telepsychological Intervention for Preventing Anxiety: A Study Protocol

Background: Anxiety is one of the most frequent disorders during the perinatal stage that is associated with adverse health effects in women and their babies. In spite of this, preventive interventions during this stage are scarce. A long-distance intervention carried out during pregnancy can be an effective and accessible resource to help improve women's emotional state. The objective of this study is to present and assess the effectiveness of a telepsychology cognitive-behavioral preventive intervention during pregnancy to manage anxiety. Methods: A random clinical trial will be carried out among pregnant women in Spain. The psychological intervention will take place via videoconference in seven weekly sessions, lasting one hour each, with groups of 6-8 pregnant women. Study outcomes will be collected via online questionnaires at five points in time: pre-intervention (baseline: t0), post-intervention (baseline: t1), follow-up at 1 month (t2), follow-up at 3 months (t3) and follow-up at 6 months (t4). The control group will receive usual pregnancy care (attendance at pregnancy follow-up consultations and information and answers to frequently asked questions provided by the midwife). Our primary hypothesis is that the intervention will decrease the frequency of women who present anxious symptomatology during pregnancy. The second objective is to analyze the effectiveness of this intervention to prevent depressive symptomatology during pregnancy, as well as postpartum anxiety and depressive symptomatology. The primary outcome measure is the difference in the mean anxiety score between the intervention and control groups assessed by the Edinburgh Depression Scale-Anxiety Subscale (EDS-3A), the State-Trait Anxiety Inventory (STAI) and Generalized Anxiety Disorder Screener (GAD-7) at the end of the intervention and at 1, 3 and 6 months postpartum. Generalized anxiety disorder (GAD) will be evaluated with the SCID clinical interview at the same time points. The secondary outcome will be determined by using the EPDS at the same time points. Conclusions: The results will determine whether a cognitive behavioral therapy applied via videoconference is well accepted by pregnant women, and if it is effective in preventing anxiety and emotional symptoms during the perinatal stage. If this intervention is an effective and useful resource among pregnant women, it can be implemented as a tool in Spanish healthcare.

Prenatal Iodine Intake and Maternal Pregnancy and Postpartum Depressive and Anhedonia Symptoms: Findings from a Multiethnic US Cohort

Objective: Emerging evidence suggests that essential trace elements, including iodine, play a vital role in depressive disorders. This study investigated whether prenatal dietary iodine intake alone and in combination with supplemental iodine intake during pregnancy were associated with antepartum and postpartum depressive and anhedonia symptoms. Methods: The study population included 837 mothers in the PRogramming of Intergenerational Stress Mechanisms (PRISM) study. The modified BLOCK food frequency questionnaire was used to estimate prenatal dietary and supplemental iodine intake, while the 10-item Edinburg Postpartum Depression Scale (EPDS) ascertained depressive symptoms. Analyses considered the global EPDS score and the anhedonia and depressive symptom subscale scores using dichotomized cutoffs. Logistic regression estimating odds ratios and 95% confidence intervals (CIs) assessed associations of iodine intake in the second trimester of pregnancy and 6-month postpartum depressive and anhedonia symptoms considering dietary intake alone and combined dietary and supplementary intake in separate models. Results: Most women were Black/Hispanic Black (43%) and non-Black Hispanics (35%), with 39% reporting a high school education or less. The median (interquartile range, IQR) dietary and supplemental iodine intake among Black/Hispanic Black (198 (115, 337) µg/day) and non-Black Hispanic women (195 (126, 323) µg/day) was higher than the overall median intake level of 187 (116, 315) µg/day. Relative to the Institute of Medicine recommended iodine intake level of 160-220 µg/day, women with intake levels < 100 µg/day, 100-<160 µg/day, >220-<400 µg/day and ≥400 µg/day had increased adjusted odds of 6-month postpartum anhedonia symptoms (aOR = 1.74 (95% CI: 1.08, 2.79), 1.25 (95% CI: 0.80, 1.99), 1.31 (95% CI: 0.82, 2.10), and 1.47 (95% CI: 0.86, 2.51), respectively). The corresponding estimates for postpartum global depressive symptoms were similar but of smaller magnitude. Conclusions: Prenatal iodine intake, whether below or above the recommended levels for pregnant women, was most strongly associated with greater anhedonia symptoms, particularly in the 6-month postpartum period. Further studies are warranted to corroborate these findings, as dietary and supplemental iodine intake are amenable to intervention.

Factor structure and longitudinal invariance for the Chinese Mainland version of the Edinburgh postnatal depression scale during pregnancy

BACKGROUND

There are inconsistent results on the Edinburgh Postnatal Depression Scale's (EPDS) factor structure and longitudinal invariance among different cultures. Furthermore, limited relevant studies in Chinese pregnant women exist.

PURPOSE

To test the factor structure of the Chinese Mainland EPDS during pregnancy and conduct longitudinal invariance analyses.

METHODS

A national multi-centre cohort study was conducted among 1207 pregnant women selected consecutively by convenience sampling from five hospitals in Zhuhai, Taiyuan, Haidian, Changchun, and Shenzhen in China between August 2015 and October 2016. Depression was measured by the EPDS during gestational weeks 10-13, 15-18, 23-25, 30-32 and 36-37, respectively.s RESULTS: Three factors with eigenvalues nearly larger than 1.0 were optimal for the Chinese Mainland EPDS, labelled "anxiety," "anhedonia," and "depression," and contained items 3-5, 1-2, and 6-10, respectively. The confirmatory factor analysis results of standardized root mean square residual (SRMR) = 0.034, root mean square error of approximation (RMSEA) = 0.049, comparative fit index (CFI) = 0.968, Tucker-Lewis index (TLI) = 0.954, and χ2, p < 0.05 indicated good fit. For the longitudinal invariance tests, the configural invariance was met, with the CFI and TLI both higher than 0.90 and the RMSEA lower than 0.08 (CFI = 0.919, TLI = 0.908, and RMSEA = 0.034). The metric-, scalar-, and strict invariances were met.

CONCLUSIONS

The three-factor model of the Chinese Mainland EPDS is invariant in pregnancy, suggesting stability and comparability in identifying the women screened positive at different points during pregnancy and making the scale feasible to screen prenatal depression and anxiety simultaneously.

Are Providers Adequately Screening for Anxiety Symptoms During Pregnancy?

OBJECTIVE

To examine the difference in prevalence of self-reported anxiety symptoms throughout pregnancy compared to clinical diagnosis of an anxiety disorder by a provider.

DESIGN

Secondary data analysis of a prospective cohort study of 50 pregnant individuals.

SETTING/LOCAL PROBLEM

Pregnant individuals commonly experience heightened anxiety symptoms, which are associated with adverse perinatal outcomes. However, a diagnosis of an anxiety disorder by a health care provider is less common, which may result in insufficient mental health intervention.

PARTICIPANTS

Pregnant individuals were recruited at their first prenatal appointment and followed until birth.

INTERVENTION/MEASUREMENTS

We examined anxiety symptoms using the Edinburgh Postnatal Depression Scale Anxiety subscale. We conducted a medical record review to examine if pregnant individuals were clinically diagnosed with an anxiety disorder.

RESULTS

Based on an Edinburgh Postnatal Depression Scale Anxiety subscale cutoff score of ≥5, 40% (n = 20) of individuals experienced anxiety symptoms during pregnancy. However, only 16% (n = 8) of participants were diagnosed with an anxiety disorder by a health care provider.

CONCLUSION

Anxiety symptoms are prevalent throughout pregnancy and may be underdiagnosed by health care providers. An intervention to increase clinical diagnosis of an anxiety disorder and subsequent referral to a mental health specialist may be indicated.

Can EPDS and EPDS-3A be used to replace GAD-7 to screen the anxiety of pregnant women during pregnancy examination?

OBJECTIVE

To examine the screening ability and cut-off scores of the Edinburgh Postnatal Depression Scale (EPDS) and EPDS-3A for pregnancy anxiety in pregnancy examination.

METHODS

This was a prospective repetitive measurement study. A follow-up survey was performed in Chinese pregnant women with the EPDS, the 7-item Generalized Anxiety Disorder (GAD-7) scale and a basic information questionnaire. A total of 609 women participated in all surveys at three trimesters, and all data were complete with no missing values. Receiver operating characteristic curves, Cohen's kappa and cross-tabulation were used to test the single and combined screening ability of EPDS and EPDS-3A for pregnancy anxiety.

RESULTS

The areas under the curves of EPDS and EPDS-3A were close to or more than 0.90. EPDS scores greater than 14 in the first trimester and greater than 13 in the second and third trimesters could be used as the cut-off values. EPDS-3A score greater than 4 could be used as the cut-off value in each trimester. Adding the EPDS-3A to the EPDS would lead to correct identification of an additional 6.33%, 6.35%, and 7.25% of anxious women and misdiagnosis of an additional 6.60%, 2.56%, and 2.41% of normal women in each trimester, respectively.

CONCLUSION

The EPDS and EPDS-3A can be used alone or in combination for initially screening of pregnancy anxiety. Under certain conditions, they can even be used to replace GAD-7 for anxiety screening to reduce the adverse influence of excessive screening on pregnant women, and improve the quality of survey data and efficiency of clinical services.

Associated factors of depression in primiparas with hypothyroidism during pregnancy

This cross-sectional study aimed to explore the associated factors of depression in primiparas with hypothyroidism during pregnancy. The research subjects were 200 primiparas with hypothyroidism during pregnancy who were admitted to our hospital between December 2016 and December 2019. Self-rating depression scale scores were used to evaluate the depression, and the incidence of depression were examined. The data from all the subjects were collected to compare the differences between primiparas with hypothyroidism during pregnancy with and without depression. A logistic regression equation was used to analyze the influencing factors of depression in these patients. Of the 200 primiparas who took part in this study, 27 suffered from depression, accounting for 13.50%. There were differences in age, education level, economic income, sleep quality, and conjugal relations between the depressed and the nondepressed participants. When the above factors were included in the logistic regression equation, it was found that the odds ratio values for these factors were all >1, which indicated that they had an influence on maternal depression in primiparas with hypothyroidism during pregnancy. This study demonstrated that pregnancy-associated hypothyroidism in primiparas is affected by age, education level, economic income, sleep quality, and conjugal relations, all of which increase the incidence of depression. Relevant preventive measures should be provided in clinical practice to avoid the occurrence of depression.

The approach to managing perinatal anxiety: A mini-review

Perinatal Anxiety (PNA) is defined as anxiety occurring during pregnancy and up to 12 months post-partum and is estimated to affect up to 20% of women. Risk factors for PNA are multiple and can be classed as psychological, social and biological. PNA negatively impacts on the mother, child and family. PNA is not well-recognized and diagnosis of PNA can be challenging for clinicians. There is currently no validated case-finding or diagnostic test available for PNA. PNA has been less extensively researched than perinatal depression (PND). Clinical guidance currently recommends pharmacological and psychological therapies for the management of women with PNA, however the limited research available suggests that other intervention types may also be effective with some evidence on the effectiveness of non-pharmacological interventions in primary care for PNA. This article provides a mini-review of PNA, summarizing current evidence around PNA including risk factors, the impact of PNA, the process of diagnosis of PNA and focussing predominantly on available management options for PNA.

Postnatal maternal depressive symptoms and behavioural outcomes in term-born and preterm-born toddlers: a longitudinal UK community cohort study

OBJECTIVES

To examine the association between maternal depressive symptoms in the immediate postnatal period and offspring's behavioural outcomes in a large cohort of term-born and preterm-born toddlers.

DESIGN AND PARTICIPANTS

Data were drawn from the Developing Human Connectome Project. Maternal postnatal depressive symptoms were assessed at term-equivalent age, and children's outcomes were evaluated at a median corrected age of 18.4 months (range 17.3-24.3).

EXPOSURE AND OUTCOMES

Preterm birth was defined as <37 weeks completed gestation. Maternal depressive symptoms were assessed with the Edinburgh Postnatal Depression Scale (EPDS). Toddlers' outcome measures were parent-rated Child Behaviour Checklist 11/2-5 Total (CBCL) and Quantitative Checklist for Autism in Toddlers (Q-CHAT) scores. Toddlers' cognition was assessed with the Bayley Scales of Infant and Toddler Development-Third Edition (Bayley-III).

RESULTS

Higher maternal EPDS scores were associated with toddlers' higher CBCL (B=0.93, 95% CI 0.43 to 1.44, p<0.001, f2=0.05) and Q-CHAT scores (B=0.27, 95% CI 0.03 to 0.52, p=0.031, f2=0.01). Maternal EPDS, toddlers' CBCL and Q-CHAT scores did not differ between preterm (n=97; 19.1% of the total sample) and term participants. Maternal EPDS score did not disproportionately affect preterm children with respect to CBCL or Q-CHAT scores.

CONCLUSIONS

Our findings indicate that children whose mothers reported increased depressive symptoms in the early postnatal period, including subclinical symptoms, exhibit more parent-reported behavioural problems in toddlerhood. These associations were independent of gestational age. Further research is needed to confirm the clinical significance of these findings.