Self-Reported Prevalence and Risk Factors for Shaking and Smothering Among Mothers of 4-Month-Old Infants in Japan

Factors Associated with Poor Sleep Quality in Postpartum Women: A Crossectional Study

Objective  This study aimed to analyze the factors associated with poor sleep quality in women in the postpartum period who were assisted in a municipality in central Brazil. Material and Methods  This is a cross-sectional study ( n  = 400) conducted virtually from 2020 to 2021. Sociodemographic and clinical characteristics, self-perceived sleep, and the Pittsburgh Sleep Quality Index (PSQI) were assessed. Results  It was identified that 82% of postpartum women were between 18 and 35-years-old and had an average monthly household income of R$2,339.27 ± 1,812.95. It was also found that 33.50% (95% CI: 28.7-38.0) had sleep disorders (PSQI >10); 70.25% (95%CI 65.8-74.8) had poor sleep quality (PSQI >5); 57.4% (95% CI: 52.0-63.1) had inadequate sleep on weekdays/workdays; and 64.1% (95% CI 59.3-69.2) had unsuitable sleep on weekends/days off. It was found that the factors associated with sleep disturbance were: age between <18 years and >35 years ( p  = 0.048); difficulty to think clearly ( p  = 0.043); frequent sadness ( p  = 0.046); poor sleep quality; low income ( p  = 0.030); difficulty to think clearly ( p  = 0.013); and loss of interest in things ( p  = 0.030). As for sleep on weekdays, the associated factors were: marital status without a partner ( p  = 0.008); and being a victim of physical violence ( p  = 0.003). Finally, for sleep on weekends/off: nonwhite skin-color ( p  = 0.039); and having postpartum depression ( p  = 0.029). Conclusion  The findings of the present study call attention to the impacts of changes in women's bodies, behavior, and interpersonal relationships caused by the arrival of a newborn. We also highlight the need for a multidisciplinary and comprehensive medical approach in this period.

Attuning to the World of Peace of Mind and Trust: Women's Lived Experience of the Woman-Midwife Relationship in Japan

In Japan, many pregnant women and mothers suffer from anxiety, depression, and other postnatal issues that can be exacerbated by their birth experiences. While benefiting from advanced medical care, these women's mental and psychological health may be disregarded in their maternity care. Midwives have the potential to play a significant role in improving women's birth experiences. Hence, this study aimed to explore the meaning of the woman-midwife relationship, with a specific focus on sensing peace of mind and trust to improve women's birth experiences. Using a hermeneutic phenomenological approach, 14 Japanese women were interviewed. Sensing peace of mind and trust was one of the significant meanings of the woman-midwife relationship and is articulated across five themes: (1) attuning to the world, (2) different kinds of safety and trust, (3) relying on and entrusting midwives, (4) making a mother, and (5) an emotional bridge. The positive relationship with midwives enhanced the women's mental well-being through allowing the women to attune to the peaceful mind which directed their future perspectives and sustained them in motherhood. They became confident mothers by trusting their midwives. The maternity care system in Japan needs to shift to more relationship-based care to ensure continuity of midwifery care that will improve women's birth experiences and their long-term well-being.

Association between maternal dissatisfaction with oneself at birth and shaking and smothering toward the offspring up to 18 months old

BACKGROUND

A mother who feels dissatisfaction with herself may resort to abusive behavior such as shaking or smothering toward their offspring. Understanding this association can inform effective prevention strategies.

OBJECTIVE

This study aimed to investigate the associations between maternal feelings of dissatisfaction with oneself and infant physical abuse.

PARTICIPANTS AND SETTING

The study included 434 mothers who had recently given birth in two obstetric wards in a relatively wealthy area in Tokyo, Japan.

METHODS

Adopting a longitudinal design, the study used questionnaires post-childbirth to measure mothers' dissatisfaction with themselves. This involved evaluating perceptions of failing to meet personal standards or self-image. Physical abuse (specifically shaking or smothering) in infants was tracked at 3, 6, 12, and 18 months. Data analysis comprised multilevel analysis, group-based trajectory modeling, and multivariable logistic regression to explore the association between maternal dissatisfaction and child physical abuse.

RESULTS

Multilevel analysis showed that mothers with middle or high dissatisfaction with themselves were more likely to abuse their infant compared to mothers with low dissatisfaction with themselves (adjusted odds ratios [aOR] 5.71, 95 % confidence interval [CI], 1.06-30.78 and aOR 12.47, 95 % CI: 2.11-73.69, respectively). Trajectory analyses indicated that mothers with middle or high dissatisfaction with themselves were consistently more likely to abuse their infants up to 18 months (aOR 8.08, 95 % CI 1.61-40.53 and aOR 6.42, 95 % CI 1.27-32.43, respectively).

CONCLUSIONS

Our findings highlight a robust association between mother's dissatisfaction with themselves and a higher risk of infant physical abuse. These insights call for a comprehensive review of preventive measures for childhood physical abuse.

Effect of Postpartum Depression on Infant Safety Practices in Korea

OBJECTIVE

To describe the prevalence of postpartum depression in a sample of Korean women and to examine the effect of postpartum depression on their adoption of safety practices for their infants.

DESIGN

Secondary, cross-sectional.

SETTING

South Korea.

PARTICIPANTS

A total of 3,127 women who gave birth in 2020.

METHODS

We applied a complex sample design analysis using the national survey data on postpartum care in South Korea. We analyzed the data using weighted multivariate logistic regression to determine the association between postpartum depression and the adoption of five safety practices for infants.

RESULTS

A total 42.7% (n = 1,319) of our participants had symptoms of postpartum depression during the initial 7 days after birth. Participants who had postpartum depression were less likely to engage in certain safety practices for infants.

CONCLUSION

We propose a proactive approach to promote an improved policy for postpartum depression screening alongside a comprehensive program that offers guidance and education to mothers suffering with postpartum depression. The primary objective is to empower these mothers with essential skills that can effectively ensure the safety of their infants.

Association of severe maternal morbidity with bonding impairment and self-harm ideation: A multicenter prospective cohort study

BACKGROUND

Evidence on the association between severe maternal morbidity (SMM) and mother-infant bonding and self-harm ideation is limited. We aimed to examine these associations and the mediating effect of Neonatal Intensive Care Unit (NICU) admission at one-month postpartum.

METHODS

This multicenter, prospective cohort study was conducted in Japan (n = 5398). SMM included preeclampsia, eclampsia, severe postpartum hemorrhage, placental abruption, and a ruptured uterus. Lack of affection (LA) and Anger and Rejection (AR) were assessed using the Mother-Infant Bonding Scale (MIBS), and self-harm ideation was assessed using the 10th item of the Edinburgh Postnatal Depression Scale (EPDS). Linear and logistic regression models were used to examine the association between SMM and MIBS score and self-harm ideation. A structural equation model (SEM) was employed to examine the mediating effect of NICU admission on the association between SMM and mother-infant bonding and postpartum depressive symptoms.

RESULTS

Women with SMM had a 0.21 (95 % confidence interval [CI]: 0.03-0.40) point higher MIBS score and a decreasing trend in the risk of self-harm ideation (odds ratio 0.28, 95 % CI: 0.07-1.14) compared to those without SMM. SEM analysis revealed that SMM was associated with MIBS partially through NICU admission.

LIMITATIONS

EPDS scores during pregnancy could be an unmeasured confounder.

CONCLUSIONS

Women with SMM had higher MIBS scores, particularly on the LA subscale, which was partially mediated by NICU admission. Psychotherapy to support parent-infant relationships is necessary for women with SMM.

Parental Knowledge and Awareness about Shaken Baby Syndrome in Jeddah, Saudi Arabia: A Cross-Sectional Study

BACKGROUND

Despite the serious consequences of shaken baby syndrome (SBS), previous studies revealed a low level of knowledge among Saudi parents.

METHODS

This is a cross-sectional study. An electronic questionnaire was distributed through social media platforms to parents of pediatric age group children in Jeddah, Saudi Arabia. A total of 524 responses were received. Data about participants' demographics, knowledge, attitude, and practice regarding SBS were collected through convenient random sampling.

RESULTS

A total of 524 responses were received; 30.7% of the participants were familiar with SBS. The Internet and the social media platforms were the most common sources of information. There was no statistically significant correlation between knowledge levels and participants' sociodemographic factors; only 32.3% of individuals had good knowledge. Of them, 84% had a positive attitude towards learning more about SBS, and 40.1% and 34.3% were interested in learning more about SBS before and during pregnancy, respectively. Carrying the baby and shaking were the actions most frequently taken when a baby was crying. Of them, 23.9% forcefully shake their child, while 41.4% of them throw their infant up in the air and catch it.

CONCLUSIONS

It is important to conduct health education programs on SBS for mothers throughout the prenatal period.

Omega-3 fatty acid intake during pregnancy and risk of infant maltreatment: a nationwide birth cohort - the Japan Environment and Children's Study

BACKGROUND

Intake of omega-3 polyunsaturated fatty acids (PUFAs) has favorable effects, including reducing violent and aggressive behaviors, but its association with infant maltreatment is unknown. We therefore tested the hypothesis that maternal intake of omega-3 PUFAs is associated with a lower risk of infant maltreatment.

METHODS

Participants were 92 191 mothers involved in the ongoing Japan Environment and Children's Study. Omega-3 PUFA intake during pregnancy was measured using a food frequency questionnaire. Infant maltreatment was assessed using a self-reported questionnaire administered at 1 and 6 months postpartum.

RESULTS

Analysis using the lowest quintile of intake as a reference revealed that the adjusted odds ratios (ORs) with 95% confidence intervals (CIs) for cases of 'hitting' decreased as quintiles increased, with values for the second to fifth quintiles of 0.93 (95% CI 0.77-1.13), 0.79 (95% CI 0.64-0.97), 0.78 (95% CI 0.64-0.96), and 0.72 (95% CI 0.59-0.89), respectively. Adjusted ORs (95% CIs) for 'shaking very hard' at 6 months were 0.87 (0.73-1.04), 0.81 (0.67-0.97), 0.73 (0.61-0.89), and 0.78 (0.65-0.94), respectively. Adjusted ORs for 'leaving alone at home' for the second to fifth quintiles were 0.92 (0.87-0.98), 0.91 (0.86-0.97), 0.94 (0.88-0.99), and 0.85 (0.80-0.90), respectively.

CONCLUSIONS

Higher maternal intake of omega-3 PUFAs during pregnancy was associated with fewer cases of hitting and violent shaking and leaving the child alone at home, implying a lower risk of infant maltreatment. Our results indicate the potential applicability of omega-3 PUFAs in reducing infant maltreatment.

Shaken Baby Syndrome Education for Mothers Awaiting Appointments in Rural OB/GYN Office

A partnership between a nursing program and a rural obstetric office provided education to pregnant and postpartum women about coping with infant crying and the dangers of shaking a baby. Undergraduate nursing students delivered the Period of PURPLE Crying (PURPLE) educational program to 148 mothers. Change in knowledge about infant crying and the community clinical experience was evaluated. Pre and post intervention data were collected. Descriptive statistics indicated higher scores on mothers' posttest for knowledge about normal newborn crying behaviors and coping strategies. Students further developed the role of educator and researcher. These findings suggest the intervention contributed to mothers' improved knowledge about infant crying. Results of the pilot study are encouraging because the intervention had a significant effect on mothers' knowledge about infant crying and Shaken Baby Syndrome (SBS).

Development of Social Life Impact for Mother (SLIM) scale at first trimester to identify mothers who need social support postpartum: a hospital-based prospective study in Japan

OBJECTIVE

To develop and validate the Social Life Impact for Mother (SLIM) scale to identify mothers in Japan who need social support postpartum.

METHODS

Hospital-based prospective study was implemented nationwide in Japan. A total of 7462 pregnant women completed the SLIM scale in their first trimester, and postpartum social problems (postpartum depression and bonding disorders) were assessed at 1 month after delivery (N = 5768, follow-up rate 77.3%). Multivariate logistic regression was applied to investigate the association between SLIM scale and postpartum social problems.

RESULTS

The SLIM scale is made up of nine risk factors for postpartum social problems, including relationship problems, lower financial status, and lack of social support. The SLIM scale predicted postpartum social problems with moderate accuracy (area under the curve 0.63, 95% confidence interval 0.60-0.65). Further stratification by local clinic and tertiary hospital did not affect the estimates.

CONCLUSION

The SLIM scale at prenatal check-up may be useful for obstetricians to detect mothers with postpartum social problems. Further intervention studies using the SLIM score are warranted.

The Association Between Maternal Shaking Behavior and Inappropriate Infant Parenting: The Japan Environment and Children's Study

Background

Although many studies have identified risk factors for maternal shaking behavior, it is unknown whether mothers who have shaken their infants repeat shaking behavior or show other inappropriate parenting behaviors. Using data from the Japan Environment and Children's Study (JECS) birth cohort study, we investigated the associations between continuous shaking behavior and the associations between shaking behavior and other inappropriate parenting behaviors.

Methods

JECS data starting from 2011 were used. Logistic regression was used to perform a cross-sectional analysis. The explanatory variable was shaking behavior and the dependent variables were leaving the infant home alone and hitting the infant (both at 1 month postpartum), and non-vaccination and infant burns (both at 6 months postpartum). A longitudinal analysis using logistic regression was also performed; here the explanatory variable was shaking behavior at 1 month postpartum and the dependent variables were shaking behavior, non-vaccination of the infant, and infant burns (all at 6 months postpartum).

Results

In this study, 16.8% and 1.2% of mothers reported shaking behavior at 1 month and 6 months postpartum, respectively. Mothers who shook their infants at 1 month postpartum were approximately five times more likely to shake them at 6 months postpartum compared with mothers who had not shown previous shaking behavior (OR = 4.92, 95% CI [4.22, 5.73], p &lt; 0.001). In Cross-sectional study, there were associations between shaking behavior and inappropriate parenting behavior such as hitting the infant and infant burns.

Conclusion

The findings suggest that mothers who report early shaking behavior tend to subsequently repeat this behavior, and that shaking behavior may be associated with other inappropriate parenting behaviors.

A multidimensional physical scale is a useful screening test for mild depression associated with childcare in Japanese child-rearing women

INTRODUCTION

Maternal depression is one of the important problems of postpartum women. For its early detection and appropriate treatment, it is necessary to identify women at high risk for depression quickly and easily.

MATERIALS AND METHODS

A simple screening scale for depression from physical aspects, the multidimensional physical scale (MDPS), which is a 17-item, self-report, three-step scale (0, 1, 2) according to the theory of Kampo medicine, was developed. The aim of the present study was to develop (n = 785) and validate (n = 350) the MDPS that was designed to rate the risk of depression. The Beck Depression Inventory-Second Edition was used for determination of depression. In the development cohort, the final model was determined using multi-regression logistic analysis.

RESULTS

The components of the MDPS for mothers (MDPS-M) were developed, containing the total score of MDPS (0-34 points) and resumption of menstruation or not (-3, 0 points). Receiver-operating characteristic curve analysis of the MDPS-M (-3 to 34) for identifying a high risk of depression showed moderately good discrimination [area under the curve (AUC) = 0.74, 95% confidence interval (CI): 0.70-0.78]. At the cutoff value of MDPS-M (9/10), its sensitivity, specificity, positive predictive value, and negative predictive value were 84.9, 45.7, 36.7, and 89.2%, respectively. External validation of the MDPS-M showed moderately good discrimination (AUC = 0.74, 95% CI: 0.68-0.79) using the same analysis as the development cohort.

CONCLUSION

These results indicate that the MDPS-M is a useful, simple, clinical scale for early identification of mothers at high risk of depression in primary care.

Incidence of hospitalization for abusive head trauma in Chiba City, Japan

BACKGROUNDS

This study aimed to examine the incidence of abusive head trauma (AHT) admissions by calculating admission rates of AHT cases among infants <12 months old in a population-based sample in Chiba city, Chiba prefecture, Japan.

METHODS

We retrospectively examined medical records of infants admitted to all pediatric secondary and tertiary hospitals in Chiba city between 2011 and 2015. We collected 13 AHT cases, as assessed by hospital-based multidisciplinary child protection teams. One experienced pediatric radiologist and two pediatricians evaluated the case histories and computed tomography images of cases to evaluate them clinically as "strongly" or "moderately" suspected AHT.

RESULTS

The overall incidence per 100 000 person-years was 34.5 cases (95% confidence interval (CI): 18.4-59.1), of which 13.3 (95% CI: 4.3-31.0), were strongly suspected to be AHT and 21.3 (95% CI: 9.2-41.9) were moderately suspected. There were no statistical differences in computed tomography findings between severe and moderately suspected AHT.

CONCLUSIONS

The incidence of hospitalization of infants with AHT was similar to that reported in population-based studies in other countries.

CE: Postpartum Depression: A Nurse's Guide

ABSTRACT

Despite extensive research, the etiology behind postpartum depression (PPD) remains a mystery. Experts have theorized about various potential risk factors, including hormonal fluctuations, genetics, prior history of depression, low socioeconomic status, adolescent pregnancy, and certain personality traits. This article provides foundational information about PPD, reviewing the risk factors for and the consequences of this mood disorder. Postpartum blues and postpartum psychosis are briefly discussed for context, although they differ from PPD. Screening and treatment options are explained, and nursing implications for practice are presented.

Parental knowledge on infant crying and abusive head trauma and relevant shaking behaviors in China

BACKGROUND

This study aims to characterize the knowledge about infant crying and abusive head trauma (AHT), and shaking behaviors in parents of children in China, which are lacking currently.

METHODS

A cross-sectional survey was conducted in 2020. We collected information about the knowledge of the typical patterns of infant crying and AHT, and asked about beliefs of the effects of violent shaking on children's health, and shaking behavior among parents.

RESULTS

A total of 568 parents completed the questionnaire, and only 1.6 % of them answered all nine knowledge questions related to infant crying correctly. Overall, 42.6 % of participants reported they had heard about AHT, but only 17.1 % of the parents reported they knew enough about the dangers of infant shaking. About 45 % of the parents acknowledged that they had shaken their infants at least once. Parents who were from western region of China (OR = 3.860; 95 % CI = 1.871, 7.966; p < 0.001) and have felt very frustrated because of the baby's crying over half of the time (OR = 3.401; 95 % CI = 1.862, 6.211; p < 0.001) had the highest risk of shaking. Majority of the parents reported that they needed further information about infant soothing techniques, knowledge of prevention and treatment about AHT.

CONCLUSIONS

Majority of Chinese parents do not have enough knowledge about normal infant crying, nevertheless, most of them expressing needs in learning more. Community-wide advocating efforts aiming to educate parents on awareness and knowledge about AHT should be a health priority in China.

Incidence of and improvement in inappropriate parental behaviors of mothers with young children: a retrospective cohort study conducted in collaboration with a local government

Background

Inappropriate parental behaviors of mothers toward young children require further study; few epidemiological studies have utilized longitudinal analysis of region-based cohorts. This study examined the frequency of incidence of and improvements in inappropriate parental behaviors of mothers with young children and related factors.

Methods

Among the mothers who underwent a checkup in Fukushima City in 2017, 586 mothers with data from 4-, 18-, and 42-month-old checkups were included in analysis. In this retrospective cohort study, an anonymous database was created by transcribing and matching health checkup records with questionnaires stored at the city health center. Data were analyzed using chi-square tests and logistic regression analysis, using the SPSS Ver.20.0.

Results

In 28.5% of mothers, inappropriate parental behaviors were not reported in the 18-month-old data but were reported in the 42-month-old data. In 3.8%, inappropriate parental behaviors were reported in the 18-month-old data but were not reported in the 42-month-old data. The most common inappropriate parental behavior reported was “yelling at the child using emotional words” (18-month-old data, 16.2%; 42-month-old data, 39.5%). Mothers with financial difficulties were 2.19 times (95%CI: 1.13–4.26) more likely to begin inappropriate parental behaviors between 18 and 42 months. Improvements in parental behaviors were significantly higher in mothers under 30 years old (p = 0.03).

Conclusions

It is necessary to identify mothers with financial difficulties early and to examine how to provide childcare and financial support from a local government at the time of child health checkup.

Prenatal Sociodemographic Factors Predicting Maltreatment of Children up to 3 Years Old: A Prospective Cohort Study Using Administrative Data in Japan

Identifying risk factors from pregnancy is essential for preventing child maltreatment. However, few studies have explored prenatal risk factors assessed at pregnancy registration. This study aimed to identify prenatal risk factors for child maltreatment during the first three years of life using population-level survey data from pregnancy notification forms. This prospective cohort study targeted all mothers and their infants enrolled for a 3- to 4-month-old health check between October 2013 and February 2014 in five municipalities in Aichi Prefecture, Japan, and followed them until the child turned 3 years old. Administrative records of registration with Regional Councils for Children Requiring Care (RCCRC), which is suggestive of child maltreatment cases, were linked with survey data from pregnancy notification forms registered at municipalities (n = 893). Exact logistic regression was used for analysis. A total of 11 children (1.2%) were registered with RCCRC by 3 years of age. Unmarried marital status, history of artificial abortion, and smoking during pregnancy were significantly associated with child maltreatment. Prenatal risk scores calculated as the sum of these prenatal risk factors, ranging from 0 to 7, showed high predictive power (area under receiver operating characteristic curve 0.805; 95% confidence interval (CI), 0.660–0.950) at a cut-off score of 2 (sensitivity = 72.7%, specificity = 83.2%). These findings suggest that variables from pregnancy notification forms may be predictors of the risk for child maltreatment by the age of three.

Is 4-month-old infants' night waking affected by mothers' responses to them? A cross-sectional survey in Japan

OBJECTIVE

To investigate the association between night waking frequency in 3- to 4-month-old infants and mothers' response to them.

DESIGN

Cross-sectional survey.

SAMPLE

We examined 663 mothers of infants aged 3-5 months who attended regular health checks for 4 months at 7 public health centres in Japan between September 2006 and March 2007.

MEASUREMENTS

Mother-reported questionnaires were used, measuring the frequency of infants' night waking and four types of responses by mothers. Using multiple regression, the association between number of wakings and each response was evaluated adjusting for covariates, that is mother's (e.g. feelings of worry and bed-sharing) and infant's (e.g. age and sex) demographic variables.

RESULTS

The number of wakings was related to "immediately feeding and/or checking diapers" (β = 0.16, p = .002).This response to infants' night waking may be associated with night waking frequency.

CONCLUSION

Modifying caregiver responses to infants' night waking by reducing immediate feeding or diaper checks could improve infants' night waking frequency.

Trauma Craniano Violento (TCV): Relação entre Conhecimento de Pais, Potencial de Abuso Infantil e Status Socioeconômico Familiar

Resumo Descreve a relação entre conhecimento sobre Trauma Craniano Violento (TCV), status socioeconômico e potencial de maus-tratos infantis. Dezenove pais e 61 mães responderam aos instrumentos Escala de Atitudes Frente ao Choro do Bebê, Inventário de Potencial de Abuso Infantil e Questionário Socioeconômico. A correlação de Spearman demonstrou resultados significativos entre escolaridade e renda com crenças sobre cuidados com o bebê (r = 0,32, p = 0,004; r = 0,22, p = 0,05, respectivamente), poder aquisitivo e escolaridade com conhecimentos sobre choro infantil (r = -0,40, p<0,001; r = -0,22, p = 0,05, respectivamente), número de filhos com estratégias para lidar com choro (r = -0,29, p = 0,01) e rigidez com consequências de sacudir o bebê e crenças sobre cuidados com o bebê (r = -0,29, p = 0,008; r = -0,359, p = 0,001, respectivamente). Considera importante direcionar intervenções às necessidades de cada população e trabalhar a flexibilidade parental para reduzir o TCV.

Prevalence of perinatal depression among Japanese men: a meta-analysis

INTRODUCTION

Perinatal depression is a widely discussed mental illness that occurs not only in women, but also in men. A previous international meta-analysis of the prevalence of paternal perinatal depression suggested that cross-cultural variables or socioeconomic environment may influence paternal depression. However, it is not clear that these data are general enough to apply to Japanese men, and there are few review articles about perinatal depression among this demographic. The purpose of our study is to provide a reliable estimate of the prevalence of perinatal depression among Japanese men.

METHOD

We searched two databases, PubMed and ICHUSHI, to identify studies with data on the prevalence of prenatal or postpartum depression among Japanese men. Data were extracted from reports published from January 1994 to June 2018. The period prevalence of paternal perinatal depression among Japanese men was investigated. A subgroup analysis of gender differences in perinatal depression was also performed.

RESULTS

We reviewed 1,379 abstracts, retrieved 33 articles and ultimately included 15 studies. The period prevalence of paternal prenatal depression in men was 8.5% (95% CI 3.3-20.3%). Moreover, the period prevalence of postpartum depression in men was 9.7% (95% CI 7.4-12.8%) within the first month, 8.6% (95% CI 5.5-13.3%) in postpartum months 1-3, 13.2% (95% CI 11.6-15.0%) in postpartum months 3-6 and 8.2% (95% CI 1.3-38.0%) in postpartum months 6-12. We also found that the prevalence of prenatal depression was significantly lower in men than in women. However, the prevalence of postpartum depression was not significantly different between men and women.

CONCLUSIONS

The prevalence of perinatal depression among Japanese men peaked at 3-6 months after birth, and its overall prevalence was approximately 10%. These results were similar to those of an international meta-analysis on perinatal depression. Notably, we found that the prevalence of postpartum depression was as high in men as it was in women. Therefore, it is suggested that healthcare workers should be more watchful for paternal perinatal depression in the postpartum period than in the prenatal period.

Association of Infertility Treatment with Perception of Infant Crying, Bonding Impairment and Abusive Behavior towards One's Infant: A Propensity-Score Matched Analysis

Background: Although previous qualitative studies suggested the link between infertility treatment and negative emotions towards infants, few empirical population-based studies have investigated the association of infertility treatment with the perception of infant crying, bonding impairment, and abusive behavior towards one’s infant. Methods: Women who participated in a four month health-checkup program in Aichi Prefecture, Japan (n = 6590) were asked to a complete a questionnaire that included infertility treatment history, perception of infant crying, maternal–infant bonding impairment assessed by the Mother to Infant Bonding Scale Japanese version, and abusive behavior towards one’s infant. Outcomes were dichotomized, and a conditional logistic regression was applied, using the propensity score match for infertility treatment exposure adjusted for known covariates. Results: A total of 690 participants (11.1%) reported infertility treatment history, and 625 cases were matched. We found that mothers with infertility treatment history were 1.36 times more likely to perceive a higher frequency of infant crying (95% confidence interval (CI):1.05–1.78), but no association with maternal–infant bonding impairment (odds ratio (OR): 1.18; 95% CI: 0.81–1.72) and abusive behavior towards the infant (OR: 0.82; 95% CI: 0.49–1.36). Conclusions: Infertility treatment may be associated with the perception of a higher frequency of infant crying, but it is not associated with bonding impairment and abusive behavior. Further longitudinal study is needed to replicate the findings.

Effectiveness of an Educational Video in Maternity Wards to Prevent Self-Reported Shaking and Smothering during the First Week of Age: A Cluster Randomized Controlled Trial

This study aimed to investigate whether watching an educational video on infant crying and the dangers of shaking and smothering within 1 week after delivery at maternity wards reduces self-reported shaking and smothering, at a 1-month health checkup. A cluster randomized controlled trial, stratified by area and hospital function, was employed in 45 obstetrics hospitals/clinics in Osaka Prefecture, Japan. In the intervention group, mothers watched an educational video on infant crying and the dangers of shaking and smothering an infant, within 1 week of age, during hospitalization at maternity wards, without blinding on group allocation. Control group received usual care. A total of 4722 (N = 2350 and 2372 for intervention and control group, respectively) mothers who delivered their babies (still birth and gestational age < 22 weeks were excluded) between October 1, 2014, and January 31 were recruited. Outcomes were self-reported shaking and smothering behaviors, knowledge on infant crying and shaking, and behaviors to cope with infant crying, assessed via a questionnaire at a 1-month health checkup. In all, 2718 (N = 1078 and 1640) responded to the questionnaire (response rate: 58.3%), and analytic sample size was 2655 (N = 1058 and 1597 for intervention and control group, respectively). Multilevel analysis was used to adjust for correlation within the cluster. Prevalence of shaking was significantly lower in the intervention group (0.19%) than in the control group (1.69%). Intention-to-treat analysis showed an 89% reduction in the reported prevalence of self-reported shaking (OR: 0.11, 95% CI: 0.02–0.53) due to watching the educational video. However, self-reported smothering behavior showed no significant reduction (OR: 0.66, 95% CI: 0.27–1.60). No side effects were reported. Watching an educational video on infant crying and the dangers of shaking and smothering within 1 week after delivery at maternity wards reduced self-reported shaking at 1 month of age. UMIN Clinical Trial Registry UMIN000015558.

Preventing postpartum depressive symptoms using an educational video on infant crying: A cluster randomized controlled trial

BACKGROUND

The aim of this study was to examine the impact of watching an educational video on infant crying within 1 week of age after delivery at maternity wards to reduce the prevalence of postpartum depressive symptoms at 1 month after giving birth.

METHODS

The study design was a cluster randomized controlled trial. The intervention hospitals were randomly assigned, stratified by area and function of the hospital. Participants included 47 obstetrics hospitals or clinics out of 150 hospitals or clinics in Osaka Prefecture, Japan. In total, 44 hospitals or clinics completed the trial and 2,601 (intervention group = 1,040, control group = 1,561) caregivers responded to the questionnaire on postpartum depression (response rate: 55.1%). Mothers in the intervention group watched an educational video, within 1 week of age, during hospitalization at maternity wards. Primary outcome in this study was postpartum depression assessed by the Edinburgh Postnatal Depression Scale as 9+ and assessed via questionnaire at a 1-month health checkup.

RESULTS

In the intervention group, 142 (13.7%) mothers reported postpartum depression compared to 250 (16.0%) in the control group. Intention-to-treat analysis showed no significant difference in the prevalence of postpartum depression between the groups. However, among young mothers (<25 years), the analysis showed a 67.0% reduction in postpartum depression (odds ratio: 0.33, 95% CI: 0.15-0.72).

CONCLUSIONS

Watching an educational video on infant crying within 1 week after delivery at maternity wards did not reduce postpartum depression at 1 month after giving birth, but it was effective for young mothers aged <25 years.

Effectiveness of using an educational video simulating the anatomical mechanism of shaking and smothering in a home-visit program to prevent self-reported infant abuse: A population-based quasi-experimental study in Japan

BACKGROUND

A video that simulates the anatomical mechanism of shaking the infant head, which may have a stronger impact on the viewer, and a tool to prevent self-reported smothering in response to crying, has never been investigated.

OBJECTIVE

To investigate whether watching an educational video at home visit at 2 months postpartum on infant crying and the dangers of shaking and smothering reduces self-reported shaking and smothering behaviors at 4 months postpartum.

METHOD

In a quasi-experimental study in A city in Japan, the video intervention was implemented at home visits by a midwife, public health nurse or trained volunteers when babies were 2 months old. At the 4-month health checkup, participants received a questionnaire about the video, self-reported shaking and smothering behaviors and other covariates. The impacts of watching the video and self-reported shaking or smothering were analyzed using multiple logistic regression.

RESULTS

In total, 5961 caregivers provided valid response for this study (valid response rate: 73.8 %). In the adjusted model, those who watched the video were 74 % less likely to shake their infants (odds ratio (OR): 0.36, 95 % confidence interval (CI): 0.21-0.64), 43 % were less likely to smother their infants (OR: 0.57, 95 % CI: 0.37-0.89), 52 % were less likely to shake or smother (OR: 0.48, 95 % CI: 0.33-0.69) their infants.

CONCLUSION

The educational video on infant crying and the dangers of shaking and smothering, with anatomical mechanism of shaking, may halve the risk of self-reported shaking and smothering at 4 months of age.

Multilevel analysis of the impact of neighborhood environment on postpartum depressive symptoms

BACKGROUND

About one in ten mothers experience postpartum depression (PPD) in Japan. Although the individual and social risk factors of depression have been reported, few studies have focused on the neighborhood environmental features. In this study, we examined the association between neighborhood environmental features and PPD symptoms among Japanese women.

METHODS

Questionnaire survey including women who participated in 3- or 4-month health checkup in Nagoya City, Japan in 2012 was used. PPD symptoms were evaluated using Edinburgh Postnatal Depression Scale (EPDS). As the neighborhood places where postpartum mothers often visit, we measured availability of grocery stores, community centers and asobiba (playground for children) within residential neighborhood unit using geographic information system. A multilevel analysis was conducted on 2,298 individuals nested within 388 school districts using Stata 15.1 software.

RESULTS

Mothers who live in the neighborhood with more number of asobiba had lower EPDS score, even after adjustment for individual factors (B: -0.12, 95%CI: -0.24, -0.01), and additional adjustment for other neighborhood environmental factors (B: -0.14, 95%CI: -0.27, -0.02).

LIMITATION

Our cross-sectional design limits to draw causal inferences. As for the evaluation of PPD symptoms, no diagnosis has been made. Moreover, we do not have the information on the accessibility to transportation, and the exact residential location of the survey respondents.

CONCLUSION

Our findings suggest that the availability of asobiba in the community has a protective effect on PPD symptoms. Providing more asobiba in the neighborhood for new mothers may be a viable preventive strategy for PPD symptoms.

Prevalence of perinatal depression among Japanese women: a meta-analysis

BACKGROUND

Perinatal depression is one of the important mental illnesses among women. However, not enough reviews have been done, and a certain consensus has not been obtained about the prevalence of perinatal depression among Japanese women. The purpose of our study is to reveal the reliable estimates about the prevalence of perinatal depression among Japanese women.

METHOD

We searched two databases, PubMed and ICHUSHI, to identify studies published from January 1994 to December 2017 with data on the prevalence of antenatal or postnatal depression. Data were extracted from published reports.

RESULTS

We reviewed 1317 abstracts, retrieved 301 articles and included 123 studies. The point prevalence of postpartum depression at 1 month was 14.3% incorporating 108,431 Japanese women. The period prevalence of depression at pregnancy was 14.0% in the second trimester and 16.3% in the third trimester. The period prevalence of postpartum depression was 15.1% within the first month, 11.6% in 1-3 months, 11.5% in 3-6 months and 11.5% in 6-12 months after birth. We also identified that compared with multiparas, primiparas was significantly associated with a higher prevalence of postpartum depression; the adjusted relative risk was 1.76.

CONCLUSIONS

The prevalence of postpartum depression at 1 month after childbirth was found to be 14.3% among Japanese women. During pregnancy, the prevalence of depression increases as childbirth approaches, and the prevalence of depression was found to decrease in the postpartum period over time. In addition, we found that the prevalence of postpartum depression in primiparas was higher than that in multiparas. Hence, we suggest that healthcare professionals need to pay more attention to primiparas than multiparas regarding postpartum depression.

Incidence and Age Distribution of Hospitalized Presumptive and Possible Abusive Head Trauma of Children Under 12 Months Old in Japan

Background

Abusive head trauma (AHT) is the leading cause of fatal maltreatment among young children. The incidence of AHT in Japan, however, remains unknown. This study examined the incidence and distribution of age in months among young children under 12 months of age hospitalized with intracranial injury in Japan.

Methods

We conducted a multicenter cross-sectional study of children under 36 months old admitted with intracranial injury to hospitals that employed the Diagnostic Procedure Combination (DPC) payment system between 2010 and 2013. Presumptive and possible AHT were defined using the combination of ICD-10 codes modified from the coding system recommended by the United States Centers for Disease Control and Prevention.

Results

The average incidence was 7.2 (95% confidence interval [CI], 7.18–7.26) for presumptive and 41.7 (95% CI, 41.7–41.8) for possible AHT per 100,000 children less than 12 months old from 2010 to 2013. The distributions of age in months for both presumptive AHT and possible AHT had peaks at around 2 and 8 months.

Conclusions

This is the first study to report the incidence of hospitalized children with presumptive and possible AHT using population-based data. Further datasets are needed to evaluate the incidence and specific preventive strategies to prevent AHT in infants during the months of highest risk.

Association of socioeconomic factors and the risk for unintentional injuries among children in Japan: a cross-sectional study

OBJECTIVES

While Japan has socioeconomic issues, such as income inequality, little is known about the association between socioeconomic factors and the risk of unintentional childhood injuries. The purpose of the study was to evaluate the influence of socioeconomic factors on the risk for unintentional injuries among preschool children in Japan.

DESIGN

Cross-sectional study using data from a web-based questionnaire survey.

SETTING

Japan (January 2015).

PARTICIPANTS

1000 households with preschool children under 6 years of age.

OUTCOME MEASURES

Multivariate logistic regression was performed to analyse the influence of socioeconomic factors on the incidence of unintentional injuries.

RESULTS

Overall, 976 households were eligible for the analysis, with 201 households reporting unintentional injuries. The incidence rates for unintentional injury were estimated to be constant across all strata constructed using combinations of socioeconomic factors. The multivariate logistic regression analysis showed no significant differences in socioeconomic factors between households that reported unintentional injuries and those that did not.

CONCLUSION

The findings of our study demonstrated that unintentional injuries among preschool children occurred at approximately fixed rates, independent of socioeconomic factors. Accordingly, prevention strategies for unintentional injuries that concern socioeconomic disadvantages should be avoided in Japan.

How do caregivers understand and respond to unsettled infant behaviour in Vietnam? A qualitative study

BACKGROUND

Unsettled infant behaviours are a common source of concern for new parents and have been associated with perinatal common mental disorders amongst women in high-income settings. There is little evidence about how unsettled infant behaviours are understood and managed in low and lower-middle income countries. This study aimed to describe caregivers' understandings of, and responses to, unsettled infant behaviours in Vietnam and their family caregiving contexts.

METHODS

Women who were mothers of infants aged 0-6 months were purposively recruited from two sites in Thua Thien Hue Province, Vietnam (one urban and one rural). An additional group of women who were grandmothers were recruited by snowball sampling. Data were collected in semi-structured interviews about demographic information, infant feeding practices, descriptions of infant crying episodes, beliefs about why infants cry, settling strategies, infant sleeping arrangements and sources of advice on infant care. Translated interview transcripts were analysed thematically.

RESULTS

Twenty-four interviews were undertaken (21 with mothers and 3 with grandmothers). Five major themes emerged from the data after analysis: infant settling techniques, sources of information on unsettled infant behaviour, understandings of the causes of infant crying, the emotional responses of caregivers and the intergenerational household context. Infants were commonly cared for by people from multiple generations, particularly during the day. Infant settling was characterized by attending to infants immediately, breastfeeding and bed-sharing with parents during the night. Most mothers received advice on caregiving from family members. Infant crying was attributed to hunger and loneliness, as well as traditional beliefs that the infant was being upset by 'ghosts' or becoming 'hot'. Women described feeling anxious, frustrated and helpless in relation to unsettled behaviours amongst their infants.

CONCLUSIONS

Educational interventions on interpreting infant cues, infant sleep requirements and bed sharing may be appropriate in Vietnam if multiple generations are included and traditional beliefs about infant crying are addressed.

Synergistic Effects of Unintended Pregnancy and Young Motherhood on Shaking and Smothering of Infants among Caregivers in Nagoya City, Japan

BACKGROUND

Shaking and smothering in response to infant crying are forms of child abuse that often result in death. Unintended pregnancy and young motherhood are risk factors of such child maltreatment that are often comorbid, few studies have examined their synergistic effect on shaking and smothering of infants. We examined the synergistic effects of unintended pregnancy and young motherhood on shaking and smothering among caregivers of infants in Japan.

METHODS

In this retrospective cohort study, a questionnaire was administered to caregivers enrolled for a health check for 3- to 4-month-old infants between October 2013 and February 2014 in Nagoya City, Japan. The questionnaire data were linked to those from pregnancy notification forms registered at municipalities and included information on women's age and feelings about their pregnancy (N = 4,159). Data were analyzed using logistic regression analysis in 2016.

RESULTS

Shaking and smothering of 3- to 4-month-old infants occurred at least once in the past month in 2.0 and 1.5% of cases, respectively. Of all participants, 24.8% reported unintended pregnancy while 7.3% were younger than 25 years old. Infants of young mothers (under 25 years old) with unintended pregnancy were 2.77 [95% confidence interval (CI): 1.15-6.68] and 5.61 (95% CI: 2.40-13.1) times more likely to be shaken and smothered, respectively, than those of older mothers with intended pregnancy. In addition, the odds ratio of young mothers with unintended pregnancy regarding smothering was significantly higher than that of older mothers with unintended pregnancy (odds ratio: 2.12; p = 0.02).

CONCLUSION

Our findings suggest a synergistic effect of unintended pregnancy and young motherhood on smothering. Infants of young mothers with unintended pregnancy are at greater risk of abuse, especially smothering. Prevention strategies are required for young women with unintended pregnancies.

Sleep Quality and Quantity in Low-Income Postpartum Women

PURPOSE

To describe and explore patterns of postpartum sleep, fatigue, and depressive symptoms in low-income urban women.

STUDY DESIGN AND METHODS

In this descriptive, exploratory, nonexperimental study, participants were recruited from an inpatient postpartum unit. Subjective measures were completed by 132 participants across five time points. Objective sleep/wake patterns were measured by 72-hour wrist actigraphy at 4 and 8 weeks. Mean sample age was 25 years, high school educated with 3.1 children. Over half the sample reported an annual income less than 50% of the federal poverty level.

RESULTS

Objectively, total nighttime sleep was 5.5 hours (week 4) and 5.4 hours (week 8). Subjectively, 85% met criteria for "poor sleep quality" at week 4, and nearly half were persistently and severely fatigued through 8 weeks postpartum.

CLINICAL IMPLICATIONS

The majority (65%) of women in this study met the definition of "short sleep duration," defined as sleeping ≤ 6 hours per night. Adverse effects of this short sleep on physical and mental health as well as safety and functioning, especially within the context of poverty, may be profound. There is an urgent need for further research on sleep in low-income underrepresented women to identify interventions that can improve sleep and fatigue as well as discern the implications of sleep deprivation on the safety and physical and mental health of this population.

Association of adverse childhood experiences with shaking and smothering behaviors among Japanese caregivers

Shaking and smothering in response to infant crying are life-threatening child abuse. Parental childhood abuse history is known to be one of the most robust risk factors for abusing their offspring. In addition to childhood abuse history, other adverse childhood exposures (ACEs) need to be considered due to co-occurrence. However, few studies have investigated the impact of ACEs on caregivers shaking and smothering their infant. This study aims to investigate the association of ACEs with shaking and smothering among caregivers of infants in Japan. A questionnaire was administered to caregivers participating in a four-month health checkup between September 2013 and August 2014 in Chiba City, Japan, to assess their ACEs (parental death, parental divorce, mentally ill parents, witness of intimate partner violence, physical abuse, neglect, psychological abuse and economic hardship), and shaking and smothering toward their infants (N=4297). Logistic regression analysis was used to examine the cumulative and individual impacts of ACEs on shaking and smothering. Analyses were conducted in 2015. A total of 28.3% reported having experienced at least one ACE during their childhood. We found that only witness of IPV had a significant association with shaking of infant (OR=1.93, 95% CI: 1.03-3.61). The total number of ACEs was not associated with either shaking or smothering. Our findings suggest that shaking and smothering in response to crying can occur regardless of ACEs. Population-based strategies that target all caregivers to prevent shaking and smothering of infants are needed.

Association between maternal intimate partner violence victimization during pregnancy and maternal abusive behavior towards infants at 4 months of age in Japan

The purpose of this study was to investigate whether maternal intimate partner violence (IPV) victimization during pregnancy is associated with abusive behavior by the mother towards infants at 4 months of age. A population-based sample of 6590 mothers with 4-month-old infants participated in this study in Japan. Abusive behavior was assessed via questionnaire and defined as frequency of shaking and smothering during the preceding month. Both verbal and physical IPV during pregnancy were assessed retrospectively. Multiple logistic regression analysis was used, adjusting for types of IPV and potential covariates, specifically postpartum depression. Maternal exposure to verbal and physical IPV during pregnancy was reported by 10.9% and 1.2% of women, respectively. In the adjusted model, women exposed to verbal IPV alone were significantly more likely to abuse offspring (odds ratio: 1.59, 95% confidence interval: 1.17-2.16) while exposure to physical IPV did not have an additive effect for abusive behavior. Maternal victimization by verbal, but not physical IPV was associated with maternal abusive behavior towards their 4-month-old infant. Screening for verbal abuse during pregnancy might be an efficient approach to identify high-risk mothers of infant abuse.