Prenatal maternal sleep and trajectories of postpartum depression and anxiety symptoms.

Postpartum emotional distress is very common, with 10%-20% of postpartum women reporting depressive or anxiety disorders. Sleep is a modifiable risk factor for emotional distress that has a pivotal role in postpartum adjustment. The present study aimed to examine whether sleep duration and quality during pregnancy predict trajectories of emotional distress in the postpartum period. Participants were 215 women that were assessed from the third trimester of pregnancy to 18-months postpartum. At all five time points (third trimester, 3-, 6-, 12-, and 18-months postpartum), measures of sleep duration and quality (measured by wake time after sleep onset; WASO) were derived from both actiography and diary-based measures. Repeated measures of depression and anxiety symptoms were collected using self-report measures. Results indicated four bivariate postpartum depression and anxiety growth trajectories, including (a) high comorbidity (5.4%); (b) moderate comorbidity (19.4%); (c) low anxiety and decreasing depression symptomology (18.6%); and (d) low symptomology (56.6%). Multinomial logistic regression analyses showed that mothers with shorter sleep durations during pregnancy were more likely to belong to the high comorbidity or moderate symptoms classes compared to the low symptomology class. In addition, mothers with higher WASO (i.e. lower sleep quality) at 3-months postpartum were more likely to belong to the moderate class compared to the low symptomology class. Given the potential negative implications of disrupted sleep in the perinatal period, the present study may inform future intervention studies that target sleep problems during pregnancy.

Mother-Infant Sleep and Maternal Emotional Distress in Solo-Mother and Two-Parent Families.

OBJECTIVE: This study examined for the first time mother-infant sleep and emotional distress in solo mother families compared with two-parent families and explored whether the links between mother-infant sleep and maternal emotional distress differ as a function of family structure. METHODS: Thirty-nine solo-mother families and 39 two-parent families, with an infant within the age range of 6-18 months participated in the study. Actigraphy and sleep diaries were used to assess maternal and infant sleep at home. Mothers completed questionnaires to assess maternal depressive and anxiety symptoms, social support, sleeping arrangements, breastfeeding, and demographics. RESULTS: Solo mothers were older and more likely to breastfeed and share a bed with their infants than married mothers. There were no significant differences between the groups in mother-infant sleep and maternal emotional distress, while controlling for maternal age, breastfeeding, and sleeping arrangements. Family structure had a moderating effect on the associations between maternal emotional distress and mother-infant sleep. Only in solo-mother families, higher maternal emotional distress was associated with lower maternal and infant sleep quality. CONCLUSIONS: Our findings suggest that, although there are no significant differences in maternal and infant sleep between solo-mother families and two-parent families, the strength of the associations between maternal emotional distress and both infant and maternal sleep quality are stronger in solo-mother families, compared with two-parent families. Hopefully, understanding which aspects of parenting may contribute to the development of sleep problems in solo-mother families could be helpful in tailoring interventions to this growing population.

Objective and subjective sleep during pregnancy: links with depressive and anxiety symptoms.

The aims of this paper are to study the associations between objective and subjective sleep in pregnant women, to examine which specific aspects of women's sleep are associated with depressive and anxiety symptoms and to test the moderating role of depressive and anxiety symptoms in the relations between objective and subjective sleep. The sample included 148 pregnant women. Objective sleep was measured by actigraphy for five nights at the participants' home, and subjective sleep was measured with the Pittsburgh sleep quality index. Depressive symptoms were assessed with the Edinburgh postnatal depression scale and anxiety symptoms with the Beck anxiety inventory. Significant associations were found between the subjective sleep measures and the depressive and anxiety scores, but there were no significant associations between actigraphic sleep measures and the depressive and anxiety scores. Depressive and anxiety scores emerged as significant moderators of the links between objective and subjective sleep. The findings suggest that emotional distress (i.e., depressive and anxiety symptoms severity) during pregnancy is associated with subjective sleep disturbances but not with objective sleep disturbances. Importantly, only among women with higher levels of emotional distress was subjective sleep quality associated with objective sleep quality. These findings may suggest that women with higher levels of emotional distress are not necessarily biased in their perception of sleep quality. However, they may perceive fragmented sleep as more detrimental to their wellbeing.

Infant sleep development from 3 to 6 months postpartum: links with maternal sleep and paternal involvement.

The aims of this longitudinal study were to examine (a) development of infant sleep and maternal sleep from 3 to 6 months postpartum; (b) concomitant and prospective links between maternal sleep and infant sleep; and (c) triadic links between paternal involvement in infant caregiving and maternal and infant sleep. The study included 57 families that were recruited during pregnancy. Maternal and infant sleep was assessed using actigraphy and sleep diaries for 5 nights. Both fathers and mothers completed a questionnaire assessing the involvement of fathers relative to mothers in infant caregiving. The results demonstrated moderate improvement in infant and maternal sleep percent between 3 and 6 months. Maternal sleep percent at 3 months significantly predicted infant sleep percent at 6 months. Greater paternal involvement in infant daytime and nighttime caregiving at 3 months significantly predicted more consolidated maternal and infant sleep at 6 months. These findings suggest that maternal sleep is an important predictor of infant sleep and that increased involvement of fathers in infant caregiving responsibilities may contribute to improvements in both maternal and infant sleep during the first 6 months postpartum.

A longitudinal study of the links between maternal and infant nocturnal wakefulness.

STUDY OBJECTIVES: To examine the longitudinal links between maternal and infant nocturnal wakefulness by employing a trajectory-based approach, and to assess whether the strength of these links differs as a function of sleep assessment method (actigraphy vs. self-report) and sleeping arrangements. METHODS: Maternal and infant nocturnal wakefulness were assessed with actigraphy and sleep diaries at home for 5 nights, at 3 (N = 191), 6 (N = 178), 12 (N = 155), and 18 (N = 135) months postpartum. Outcome measures included the number of night-wakings (NW) and the length of nocturnal wakefulness (WASO). RESULTS: Strong associations between maternal and infant nocturnal wakefulness (controlling for nighttime breastfeeding) were found for NW and WASO. Trajectory analyses demonstrated that the strength of these relations decreased linearly from 3 to 18 months. Furthermore, the findings showed that the links between maternal and infant NW and WASO were stronger for maternal reports than for actigraphy. No consistent differences were found in the strength of the relations between maternal and infant NW and WASO as a function of sleeping arrangements (ie, room-sharing vs. solitary-sleeping families). CONCLUSIONS: The results suggest that infant and maternal sleep are strongly intertwined, especially during the first 6 months. The decline in the synchronization between maternal and infant nocturnal wakefulness through infant development may be attributed to the growing ability of infants to self-soothe during the night. The findings emphasize the need to study sleep within a family context.

Maternal emotional distress and infant sleep: A longitudinal study from pregnancy through 18 months.

This longitudinal study examined whether changes in maternal emotional distress (depressive, anxiety, and parenting-stress symptoms) predict changes over time in subjective and objective infant sleep. We recruited 226 Israeli expectant mothers (M age 28.8 ± 3.3), most representing the middle-upper socioeconomic class. Maternal depressive and anxiety symptoms were assessed in the third trimester of pregnancy. After delivery (3, 6, 12, and 18 months), infant sleep quality and duration were assessed for 5 nights using actigraphy and the Brief Infant Sleep Questionnaire. Maternal depressive and anxiety symptoms were reassessed, and maternal parenting-stress was measured at all postpartum assessments. The findings demonstrated significant correlations between maternal emotional distress and mothers' subjective ratings of infant sleep problems (rs >.16 and < .46). Latent trajectory analyses indicated no significant effects of changes in maternal emotional distress variables on changes in infant subjective or objective sleep. Post hoc power analyses demonstrated that we had enough statistical power to reject the null hypothesis. The results suggest that mothers with higher emotional distress symptoms-and especially those with parenting-stress symptoms-are more likely to experience their infant's sleep as problematic. However, our results challenge the assumption that maternal emotional distress symptoms contribute to infant sleep disturbances over time. The findings are relevant to mothers with mild to moderate emotional distress symptoms and must not be generalized to mothers who experience major clinical depression. Future studies should evaluate whether maternal emotional distress interacts with other risk factors, such as infant temperament, to predict infant sleep disturbances. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Infant nocturnal wakefulness: a longitudinal study comparing three sleep assessment methods.

Study Objectives: To examine the convergence between actigraphy, sleep diaries, and the Brief Infant Sleep Questionnaire (BISQ) in the assessment of infant nocturnal wakefulness (i.e. minutes awake after sleep onset [WASO] and number of night-wakings [NW]) in the context of a longitudinal study. Methods: The sample included 226 families, who were recruited during pregnancy. Data were collected at 3, 6, 12, and 18 months postpartum. Infants' sleep was monitored at home for five nights using actigraphy, sleep diaries, and the BISQ. Outcome measures included WASO and NW, as well as sleep latency, sleep duration, and sleep onset. Results: Trajectory analyses demonstrated that all three methods showed declines in NW and WASO from 3 to 18 months. Statistically significant correlations were found between the three methods at all assessment points for all sleep variables. However, agreement rates (using Krippendorff's α and Bland-Altman analyses) between actigraphy and parental reports were poor. For NW, agreement between actigraphy and parental reports at 18 months was lower than that at 3 and 6 months. Diaries and BISQ showed satisfactory agreement for sleep latency. Conclusions: Although the three methods' measures of infant nocturnal wakefulness are significantly correlated during infancy, absolute agreement between these methods is poor overall. The growing disagreement between actigraphy and parental reports (in NW) across development probably suggests that parents become less aware of infants' awakenings, due to the increasing ability of infants to self-soothe. Using both objective and subjective assessment methods seems especially important after the age of 6 months.

Mother-infant sleep patterns and parental functioning of room-sharing and solitary-sleeping families: a longitudinal study from 3 to 18 months.

STUDY OBJECTIVES: To examine longitudinally differences in (1) objective and subjective sleep patterns and (2) parenting functioning (i.e. maternal emotional distress, maternal separation anxiety, and parental involvement in infant care) between room-sharing and solitary-sleeping mother-infant dyads. METHODS: Maternal and infant sleep, sleeping arrangements, and parental functioning were assessed at 3 (N = 146), 6 (N = 141), 12 (N = 135), and 18 (N = 130) months postpartum. Maternal and infant sleep were assessed with actigraphy and sleep diaries for five nights. Questionnaires were used to assess sleeping arrangements, nighttime breastfeeding, and parental functioning. RESULTS: Persistent room-sharing mothers (i.e. sharing a room with the infant on at least three assessment points) had significantly lower actigraphy-based sleep percent, lower longest sleep periods, and more night-wakings than persistent solitary-sleeping mothers. For infants, differences in actigraphic sleep were found only in longest sleep period, although mothers of persistent room-sharing infants reported more infant night-wakings than mothers of persistent solitary-sleeping infants. The trajectories of maternal and infant sleep in both room-sharing and solitary-sleeping groups demonstrated that sleep became more consolidated with time. Group differences indicated higher maternal separation anxiety and lower paternal overall and nighttime involvement in infant caregiving in room-sharing families compared with solitary-sleeping families. CONCLUSIONS: The findings are discussed in light of the latest American Academy of Pediatrics recommendation to share a room until 12 months postpartum. Although no causal effects can be inferred from this study, maternal sleep quality and certain parenting characteristics seem to be important factors to consider when parents consult about sleeping arrangements.

Links between infant sleep and parental tolerance for infant crying: longitudinal assessment from pregnancy through six months postpartum.

BACKGROUND: Low parental tolerance for crying has been associated with infant sleep problems, yet the directionality of this link remained unclear. This longitudinal study aimed to assess the synchronous and prospective bidirectional links between parental cry-tolerance, soothing, and infant sleep from pregnancy through six months postpartum. METHODS: Sixty-five couples were recruited during pregnancy and assessed for cry-tolerance using a paradigm in which participants were shown a videotape of a crying infant and were asked to stop the video when they feel it is necessary to intervene. Infant sleep was assessed objectively using actigraphy for five nights at three and six months postpartum. Parental soothing techniques were reported by parents at both assessment points, and cry-tolerance was reassessed at six months. RESULTS: Concomitant associations were found between maternal cry-tolerance and infant sleep at six months, indicating that lower maternal cry-tolerance was correlated with poorer actigraphic sleep quality. Furthermore, Structural Equation Modeling analyses yielded significant prospective associations, showing that lower cry-tolerance at pregnancy predicted better infant sleep at three months, whereas more disrupted sleep at three months predicted lower cry-tolerance at six months. Moreover, fathers showed higher cry-tolerance compared to mothers, and parents became more similar to each other across time in their reactivity to infant crying. CONCLUSION: Consistent with the transactional model of infant sleep, the findings of this study highlight the role of parental cry-tolerance in infant sleep development, and demonstrate bidirectional links between this construct and infant sleep throughout the first six months of life.

Sleep patterns of co-sleeping and solitary sleeping infants and mothers: a longitudinal study.

OBJECTIVE: Controversies exist regarding the impact of co-sleeping on infant sleep quality. In this context, the current study examined: (a) the differences in objective and subjective sleep patterns between co-sleeping (mostly room-sharing) and solitary sleeping mother-infant dyads; (b) the predictive links between maternal sleep during pregnancy and postnatal sleeping arrangement; (c) the bi-directional prospective associations between sleeping arrangement and infant/maternal sleep quality at three and six months postpartum. METHODS: The sample included 153 families recruited during pregnancy. Data were obtained in home settings during the third trimester of pregnancy and at three and six months postpartum. Mothers were asked to monitor their own sleep and their infants' sleep for five nights using actigraphy and sleep diaries. Questionnaires were used to assess sleeping arrangements, feeding methods, socio-demographic characteristics, and maternal depressive and anxiety symptoms. RESULTS: Mothers of co-sleeping infants reported more infant night-wakings than mothers of solitary sleeping infants. However, none of the objective sleep measures was significantly different between co-sleeping and solitary sleeping infants, after controlling for feeding techniques. Co-sleeping mothers had significantly more objective and subjective sleep disturbances than mothers in the solitary sleeping group. Moreover, poorer maternal sleep during pregnancy and at three months postpartum predicted higher levels of co-sleeping at six months. CONCLUSION: Mothers of co-sleeping infants report more infant night-wakings, and experience poorer sleep than mothers of solitary sleeping infants. The quality of maternal sleep should be taken into clinical consideration when parents consult about co-sleeping.