Search and selection of articles
The electronic database search yielded 443 articles, of which 118 duplicates were removed. From the remaining 325 articles, we conducted screening on the titles and abstracts in line with our inclusion criteria; this process further excluded 133 articles for not satisfying the inclusion criteria. A total of 192 articles that either appeared to satisfy all the inclusion and exclusion criteria or for which satisfaction of the criteria was not readily apparent, were retained for a full review, whereafter 156 articles were excluded. We performed a backwards citation chasing which yielded zero additional primary articles. Our quality appraisal using the Joanna Briggs Institute’s (JBI) Critical Appraisal Tools (CAT) Guideline further excluded one article because the postpartum period in that study was less than five days which did not meet our scoping study criteria. In total, we included 34 articles in the scoping study. The full details of the screening process are presented in Fig. 1, and a table of included articles are available in the Additional file 1.
Methodological characteristics of included articles
Of the 34 articles included in the scoping study, the most common study design was cross-sectional study (n = 18), followed by cohort studies (n = 15), and quasi-experimental study (n = 1). No qualitative studies were identified. Distribution of included articles, study designs and publication year are presented in Fig. 2.
Regional distribution
There was a high global representation among included articles (Fig. 3); Canada (n = 7), Iran and USA (n = 3), China, India, Poland, Portugal, Spain, Sweden, Turkey, and United Kingdom (n = 2), Brazil, Chile, Cote d'Ivoire, Cuba, Cyprus, Ethiopia, Germany, Ghana, Greece, Ireland, Israel, Kenya, Netherlands, and Nigeria (n = 1). Note that two articles (20, 21) had two and nine countries, respectively as study locations, hence the higher overall number.
One of the peer reviewed articles had a global focus with nine countries from different regions represented in the study. From the remaining 33 peer reviewed articles, 59% (n = 20) emerged from high-income countries (HICs), 12% (n = 4) from upper middle-income countries (UMICs), 26% (n = 9) from lower-and-middle income countries (LMICs) and only 3% (n = 1) emerged from low resource settings. A total of 11 (32%) of the peer-reviewed articles originated from the Northern America region, eight (24%) from the Asia region (East, South and West Asia), 10 (29%) from Europe, while five (15%) articles were from the Sub-Saharan Africa region.
Period of Postpartum Mental Health Evaluation
The periods during which the participant’s mental health screening evaluation was conducted varied in the included articles. Single time points (weeks) were used in nine articles: six (n = 4); four (n = 2); eight (n = 2); 24 (n = 1). A wider timespan (weeks) for the evaluations was used in 25 articles: 4 to 52 (n = 8); 4 to 24 (n = 5); 4 to 12 (n = 2); 4 to 8 (n = 2); 6 to 8 (n = 1), 6 to 10 (n = 1), 5 to 52 (n = 1); 6 to 14 (n = 1); 4 to 6 (n = 1); 4 to 16 (n = 1); 12 to 52 (n = 1), and 16 to 52 (n = 1).
Screening Instruments and Mental Health Conditions
Several mental health screening instruments are used to assess individuals' mental health states or identify signs or symptoms of psychological disorders or distress. These screening instruments assist healthcare providers or clinicians to understand the mental health condition of the individual and guide the appropriate treatment regimen. In the included articles, it was observed that the screening instruments are not designed for diagnostic purposes but only to flag areas of concern. A total of 17 different screening instruments were used to measure varying postpartum mental health conditions. Some of the articles utilized only one screening instrument and others combined multiple screening instruments based on the postpartum mental health conditions they covered. The instruments were well known for screening of mental health state, symptom severity, and anxiety in postpartum mothers and some of these instruments were adapted to different language versions.
Six different postpartum mental health conditions were covered; postpartum depression (PPD), postpartum anxiety (PPA), posttraumatic stress disorder (PTSD), generalized anxiety, bipolar disorder, and postpartum emotional disorder. The different articles covered one, two, or a maximum of three conditions, with the most common conditions beeing the PPD and the PPA, covered by 28/34 (82.4%) and 21/34 (61.8%) articles, respectively. A synthesis table with information on postpartum time point, screening instruments, and methal health conditions are available in Additional file 2.
Associated factors with postpartum mental health conditions
Theme 1: Support System
Support systems entail the kind of support received from networks, environments or communities that can directly or indirectly affect the new mother in the postpartum phase. It includes social support (the degree of support from the partner, society, and family members) and work support (the availability of support from the work environment or employers). Inadequate or lack of support systems increase the possibility of postpartum mental health issues, and stress-related workplace situations can also add to the burden.
Social support (Partner and Family) (n = 11)
Dennis et al., (21) reported that predicators of sustained postpartum anxiety were social support from the partner, mother-in-law, or other women with children at 1 week and 4 weeks, this is linked to the study by Liu et al., (22) which reported that pregnant women who received low support from family members were more likely to have PPD and PPA symptoms. Mothers with lower social support experienced higher levels of postpartum depression. In addition, mothers who received moderate social support were three times more likely to experience postpartum depression (23), in the same light, Toru et al., (24) reported that mothers prone to postpartum depression were likely to be those with poor social support, while Maliszewska et al., (25) reported that women at risk of postpartum depression had lower social support. The article from Barthel et al., (19) reported that less support from the partner and higher economic stress two years after birth were predictors of increasing anxiety. Similarly, the articles by Sylvén et al., (26); and van der Zee-van den Berg et al., (27) cited that inadequate partner support six weeks after delivery was significantly associated with anxiety and depressive symptoms. Maria et al., (28) cited that feelings of isolation from the rest of the family were possible contributing factors to PPA.
Work support (n = 3)
The article by Karl et al., (29) reported that work-related factors are associated with PPD and should be considered when screening for PPD. On the other hand, Dennis et al., (21) and Falah-Hassani et al., (30) found that work environments not supportive of the pregnancy, and women worrying about returning to work after pregnancy were significantly associated with a higher risk of postpartum mental health conditions.
Theme 2: Previous mental disorders and medical conditions
A pre-existing condition is typically a mental disorder or medical condition for which the woman has received treatment or diagnosis before the peripartum. This includes medical conditions like diabetes, sleep disorder, hypertension, and epilepsy, as well as mental health conditions like depression, anxiety, bipolar disorder, and post-traumatic stress disorder. A total of six articles presented that women at risk of postpartum depression, more often had a history of previous mental disorders (24, 25, 27, 30–32), whereas three articles identified various medical conditions to be associated with a higher risk of postpartum mental health conditions (21, 27, 30).
Theme 3: Other factors associated with postpartum mental health conditions
Other critical factors are associated with mental health conditions in the postpartum period, for example, socioeconomic issues (income, housing), violence (domestic violence and Intimate partner violence), mode of delivery (natural delivery, vaginal delivery, instrumental vaginal delivery, planned cesarean section, unplanned caesarean section), gender preference (male or female), and marital status (married, single, divorced, widowed), amidst others. These factors may occur in isolation or a combination with other factors.
Socioeconomic Issues (n = 3)
Socioeconomic issues such as financial difficulties (28), difficulties managing income and not having suitable housing (21, 30) were significantly associated with comorbid postpartum depressive symptomatology and anxiety.
Violence (n = 2)
Mothers prone to postpartum depression were likely to be those experiencing different forms of domestic violence (24). In addition, mental health conditions were 4.76 times more among mothers who reported intimate partner violence (IPV) as compared to those who did not experience IPV (33).
Mode of Delivery (n = 3)
Mothers who delivered their children through a caesarean section formed a higher proportion of those with PPD (n = 44, 18.3%) compared to those having a vaginal birth (n = 19, 7.9%, p = 0.053) (23). Similarly, women who selected cesarean section delivery were more likely to have PPA (34). Also, the mode of delivery was reported to account for 13% of the variance in symptoms severity (35).
Gender of the baby (n = 2)
The gender of the baby was reported to have a non-significant influence on the proportion of women experiencing mental health conditions as 15% of the women who had a male child and 11.3% of the women who had a female child experienced PPD (p = 0,311) (23). In another trial, when adding breastfeeding into a logistic model, those who delivered female infants were less likely to report depressive symptoms compared to male infants (adjusted odds ratio = 0.576, 95% Confidence Interval 0.431–0.770) (34).
Marital Status (n = 2)
Marital status was found to be significantly correlated with anxiety and/or depressive symptoms (36). More severe postpartum emotional disorders were associated with being single and with lower education levels (37).
Theme 4: COVID-19
There were five articles (20, 38–41) that mentioned the connection between the COVID-19 period and mental health during the postpartum period. Findings from (38–40) show a low level of social support leading to increased levels of both anxiety and depression symptoms during the postpartum period; the cases of postpartum anxiety was higher during the pandemic (38).