Longitudinal Patterns of Breastfeeding Initiation

BAP: Testing of a Breastfeeding History Questionnaire to Identify Mothers at Risk for Postpartum Formula Supplementation

Background: The objective of this study was to test a breastfeeding history questionnaire to predict inhospital formula supplementation.

Methods: A breastfeeding questionnaire named BAP, an abbreviation based on three questions, was conceptualized and implemented in clinical practice. Primary outcome was formula supplementation during the postpartum hospital stay.

Results: Multiparous women with BAP scores of 1 or less were over four times more likely to use formula during the postpartum hospital stay than women with BAP scores of 2 or greater (RR = 4.35, 95% CI [2.47, 7.65]; p < .001). Additionally, multiparous mothers with BAP scores of 1 or less were more likely to use formula than primiparous mothers (RR = 1.93, 95% CI [1.47, 2.52]; p < .001). The adjusted odds of formula use were eight times greater for women with the lower BAP score (aOR 8.04, 95% CI [3.10, 20.86]; p < .001).

Conclusions: The BAP tool can be used to identify multiparous women most at risk for early formula use, thereby allowing targeted referral to breastfeeding support services.

Changes in breastfeeding initiation at hospital discharge between first and second births in Nova Scotia: a population-based cohort study

BACKGROUND

Breastfeeding has well-recognized health benefits for infants and mothers. However, little research has been conducted to investigate changes in breastfeeding from one pregnancy to another. This study was conducted to describe rates of breastfeeding initiation at hospital discharge for women's first and second births and to identify factors associated with changes in initiation at the second birth.

METHODS

We conducted a longitudinal, population-based cohort study involving women residing in Nova Scotia who delivered a first and second live-born singleton between 2007 and 2013. Separate analyses were conducted among women who breastfed their first infant and among women who did not breastfeed their first infant.

RESULTS

Of the 9643 (82.6%) mothers who initiated breastfeeding in the first birth, 973 (10.3%) did not initiate breastfeeding in the second birth. Of first-birth noninitiators, 526 (26.3%) initiated breastfeeding in the second birth. With the exception of smoking and cesarean births, factors that were associated with breastfeeding initiation in the second birth depended on breastfeeding initiation status in the first birth. These factors were associated with increased odds of not breastfeeding in the second birth among the subset of mothers who breastfed in the first birth, and decreased odds of breastfeeding in the second birth among the subset of mothers who did not breastfeed in the first birth.

INTERPRETATION

Most women continue the same method of infant feeding after their first and second births. Identifying factors associated with change in breastfeeding status between the first and second births may help to inform interventions for optimal breastfeeding initiation in the second birth.

Factors Associated with Recurrent Infant Feeding Practices in Subsequent Births

BACKGROUND

Previous breastfeeding experience has been associated with subsequent infant feeding practices. However, few longitudinal studies have investigated formula-only feeding patterns or the full range of potentially associated characteristics.

OBJECTIVE

This study aimed to determine the recurrence of infant feeding practices and maternal, birthing, and infant characteristics associated with recurrent formula-only feeding and changes between exclusive breastfeeding and formula-only feeding across subsequent births.

METHODS

We conducted a population-based record-linkage study of 317 027 mothers, with a term singleton live-birth in 2007-2011, New South Wales, Australia. Infant feeding patterns were described using sequential birth pairs. For mothers with a first and second birth, robust Poisson regression was used to investigate the association between maternal, birthing, and infant characteristics and infant feeding patterns. Combined relative risks (RRs) were calculated for selected maternal characteristics.

RESULTS

Across 69 994 sequential birth pairs, the recurrence rate of formula-only feeding was 71%, and 92% for exclusive breastfeeding. Maternal characteristics < 25 years old, being Australian born or single, smoking during pregnancy, and living in lower socioeconomic areas were most strongly associated with repeat formula-only feeding (RR, 22.1; 95% confidence interval [CI], 18.6-26.3), changing from exclusive breastfeeding to formula-only feeding (RR, 9.0; 95% CI, 7.4-10.7), and being less likely to change from formula-only feeding to exclusive breastfeeding (RR, 0.47; 95% CI, 0.38-0.59).

CONCLUSION

Infant feeding practices were strongly recurrent, highlighting the importance of successful breastfeeding for first-time mothers. Additional support for young mothers from disadvantaged backgrounds accounting for infant feeding history, experiences, and common barriers could improve recurrent exclusive breastfeeding and positively affect infant and maternal health.

Antenatal education to increase exclusive breastfeeding: a randomized controlled trial

OBJECTIVE

To evaluate the effectiveness of a professional one-to-one antenatal breastfeeding support and education intervention on the exclusivity and duration of breastfeeding.

METHODS

A total of 469 primiparous women who attended the antenatal clinics of two geographically distributed public hospitals in Hong Kong were randomized to receive either standard antenatal care or a one-to-one antenatal breastfeeding support and education session. The primary outcome was the prevalence of exclusive breastfeeding at 6 weeks postpartum. Secondary outcomes were the prevalence of exclusive breastfeeding at 3 and 6 months postpartum as well as the overall duration of any and exclusive breastfeeding across the first 6 months postpartum.

RESULTS

The exclusive breastfeeding rate in the intervention group was 37.8% at 6 weeks postpartum compared with 36.4% in the standard care group (P=.77; 95% confidence interval [CI] -0.08 to 0.11). There were no significant differences between the two treatment groups in exclusive breastfeeding rates at 3 and 6 months or in the overall duration of any (hazard ratio [HR] 1.11, 95% CI 0.88-1.40] or exclusive breastfeeding (HR 0.96, 95% CI 0.79-1.17). The study had a least 80% power to detect a 50% increase in the rate of exclusive breastfeeding at 6 weeks postpartum.

CONCLUSION

In a setting with a high breastfeeding initiation rate, one-to-one antenatal breastfeeding support and education did not increase the exclusivity or duration of breastfeeding.

CLINICAL TRIAL REGISTRATION

ClinicalTrials.gov, www.clinicaltrials.gov, NCT01648114.

Previous breastfeeding experience and duration of any and exclusive breastfeeding among multiparous mothers

BACKGROUND

High breastfeeding attrition rates have been attributed to a number of factors, but the effect of previous breastfeeding experience on subsequent breastfeeding duration has not been adequately investigated.

METHODS

In this study, 559 multiparous mothers were recruited and followed prospectively for 12 months or until the infant was weaned.

RESULTS

When compared with having previously breastfed for > 3 months, no previous breastfeeding experience (HR 3.24 [95% CI 2.37-4.42]) or a breastfeeding duration of ≤ 3 months (HR 2.56; 95% CI 2.05?3.20) substantially increased the risk of early weaning. Similarly, participants who had not exclusively breastfed (HR 1.82 [95% CI 1.46?2.26]) or who had exclusively breastfed for ≤ 2 months (HR 1.65 [95% CI 1.29?2.10]) were more likely to stop exclusive breastfeeding when compared with those who had exclusively breastfed for > 2 months. More than 40 percent of the participants who had previously breastfed for > 3 months had shorter current breastfeeding durations. The median decreases in any and exclusive breastfeeding for this group were 16.4 weeks and 13.1 weeks, respectively.

CONCLUSIONS

Multiparous women with no previous breastfeeding experience and those with a short duration of previous breastfeeding should be provided with greater support to promote a longer duration of breastfeeding. Multiparous women with a longer duration of breastfeeding should be strongly encouraged to meet or exceed this duration with their current infant.

Exploring intended infant feeding decisions among low-income women

BACKGROUND

Low-income women have the lowest rates of breastfeeding in the United States. Greater understanding of factors that predict intention to feed artificial breastmilk substitute is needed to inform the design and timing of interventions to promote breastfeeding among vulnerable women. This study aimed to identify demographic and reproductive characteristics and other factors associated with intent to feed artificial breastmilk substitute among low-income women.

MATERIALS AND METHODS

Data from 520 low-income women interviewed at 24-41 weeks of gestation during enrollment in a prenatal breastfeeding education intervention study were analyzed. Participant characteristics, reasons for feeding decision, and sources and types of information received were compared among women intending to feed only artificial breastmilk substitute and other women.

RESULTS

Most participants (95%) had already chosen an infant feeding method at the time of interview. There were no differences in plans to return to work by feeding plan. Women reporting intention to feed only artificial breastmilk substitute were less likely to report receiving information about the benefits of breastfeeding, how to breastfeed, and pumps and were more likely to cite personal preference and convenience as reasons for their decision. Women were more likely to intend to feed artificial breastmilk substitute if they had a previous live birth or had not breastfed a child, including the most recent.

CONCLUSIONS

These findings suggest breastfeeding promotion should target women early and include sensitive, effective ways to promote breastfeeding among women who have not previously successfully breastfed. Breastfeeding history should be elicited, and plans to pump should be supported prenatally.

Selected Health Status Measures of Children from US Immigrant Families

Using the 2007 National Survey of Children's Health (N = 91,532), we studied the relationship between the joint effects of immigrant family type (foreign-born children, US-born children/one foreign-born parent, US-born children/both foreign-born parents, and US-born children/US-born parents) and race/ethnicity on various health measures (parent-reported physical and dental health, obesity/overweight, breast-feeding, school absence, injury, and chronic condition). We used weighted logistic regression to examine the independent effects of the 12-level joint variable on various health status measures while controlling for confounding factors. Overall, nearly one-third of families with both foreign-born parents were poor, and one-quarter of the parents in these households did not complete high school. Compared with non-Hispanic White US-born children, multivariable analyses indicate that all Hispanic children have higher odds of obesity, poor physical and dental health, with Hispanic foreign-born children 7 times as likely to report poor/fair physical health. Most children of immigrant parents were more likely to have been breast-fed and less likely to miss school more than 11 days. Child age and household poverty status were independently associated with most of the health status measures. Combined race/ethnicity and immigrant family type categories have heterogeneous associations with each health outcome measure examined. Culturally competent interventions and policies should be developed to serve these expanding communities.

Evidence-based interventions to support breastfeeding

Considerable progress has been made in the past decade in developing comprehensive support systems to enable more women to reach their breastfeeding goals. Given that most women in the United States participate in some breastfeeding, it is essential that each of these support systems be rigorously tested and if effective replicated. Additional research is needed to determine the best methods of support during the preconception period to prepare women to exclusively breastfeed as a cultural norm.

Contradictions and conflict: a meta-ethnographic study of migrant women's experiences of breastfeeding in a new country

Background

Studies report mixed findings about rates of both exclusive and partial breastfeeding amongst women who are migrants or refugees in high income countries. It is important to understand the beliefs and experiences that impact on migrant and refugee women’s infant feeding decisions in order to appropriately support women to breastfeed in a new country. The aim of this paper is to report the findings of a meta-ethnographic study that explored migrant and refugee women’s experiences and practices related to breastfeeding in a new country.

Methods

CINAHL, MEDLINE, PubMed, SCOPUS and the Cochrane Library with Full Text databases were searched for the period January 2000 to May 2012. Out of 2355 papers retrieved 11 met the inclusion criteria. A meta-ethnographic synthesis was undertaken using the analytic strategies and theme synthesis techniques of reciprocal translation and refutational investigation. Quality appraisal was undertaken using the Critical Appraisal Skills Programme (CASP) tool.

Results

Eight qualitative studies and three studies reporting both qualitative and quantitative data were included and one overarching theme emerged: ‘Breastfeeding in a new country: facing contradictions and conflict’. This theme comprised four sub-themes ‘Mother’s milk is best’; ‘Contradictions and conflict in breastfeeding practices’; ‘Producing breast milk requires energy and good health’; and ‘The dominant role of female relatives’. Migrant women who valued, but did not have access to, traditional postpartum practices, were more likely to cease breastfeeding. Women reported a clash between their individual beliefs and practices and the dominant practices in the new country, and also a tension with family members either in the country of origin or in the new country.

Conclusion

Migrant women experience tensions in their breastfeeding experience and require support from professionals who can sensitively address their individual needs. Strategies to engage grandmothers in educational opportunities may offer a novel approach to breastfeeding support.

Breastfeeding practices among first-time mothers and across multiple pregnancies

To investigate maternal characteristics associated with breastfeeding initiation and success. Women enrolled in the Mothers Outcomes After Delivery study reported breastfeeding practices 5-10 years after a first delivery. Women were classified as successful breastfeeding initiators, unsuccessful initiators, or non-initiators. For the first birth, demographic and obstetrical characteristics were compared across these three breastfeeding groups. For multiparous women, agreement in breastfeeding status between births was evaluated. Multivariate regression analysis was used to identify characteristics associated with non-initiation and unsuccessful breastfeeding across all births. Of 812 participants, 740 (91%) mothers tried to breastfeed their first child and 593 (73%) reported breastfeeding successfully. In a multivariate analysis, less educated women were less likely to initiate breastfeeding (odds ratio (OR) for non-initiation 1.97; 95% confidence interval (CI) 1.23, 3.14). There was a notable decrease in breastfeeding initiation with increasing birth order: compared to the first birth, the odds for non-initiation after a second delivery almost doubled (OR 1.83, 95% CI 1.42, 2.35) and the odds for non-initiation after a third delivery were further increased (OR 2.44, 95% CI 1.56, 3.82). Successful breastfeeding in a first pregnancy was a predictor of subsequent breastfeeding initiation and success. Specifically, women who did not attempt breastfeeding or who reported unsuccessful attempts to breastfeed at first birth were unlikely to initiate breastfeeding at later births. Cesarean delivery was not associated with breastfeeding initiation (OR 1.01; 95% CI 0.68, 1.48) or success (OR 1.33; 95% CI 0.92, 1.94). Breastfeeding practices after a first birth are a significant predictor of breastfeeding in subsequent births.

Previous breastfeeding practices and duration of exclusive breastfeeding in the United States

We examined the influence of duration of exclusive breastfeeding (DEBF) for a mother's earlier children on the DEBF for her later children among multiparous women from the 2002 National Survey of Family Growth. DEBF was categorized as: never breastfed (NBF) (referent); not exclusively breastfed or exclusively breastfed for <4 months (EBF<4); and exclusively breastfed for ≥4 months (EBF≥4). We examined DEBF using weighted percentages and odds ratios (OR) with 95% confidence intervals (CI) from multinomial logistic regression models, adjusting for maternal factors. About 70% of multiparous women (n=2,149) repeated the duration of exclusive breastfeeding of their first child for their second child; 14% of women repeated EBF≥4. Among multiparous women, the adjusted odds ratio for EBF≥4 for second children was 7.2 (95% CI=4.0-12.9) when first children were EBF<4 and 90.7 (95% CI=45.4-181.4) when first children were EBF≥4, relative to NBF first children. In analyses where DEBF of third children was the outcome, odds of EBF≥4 were more strongly influenced by DEBF of second children while the impact of DEBF of first children was not as strong. Older maternal age and being married were related to an increased DEBF. Being married at second birth predicted a change from NBF for first children to EBF≥4 for second children (OR=6.2, 95% CI=2.7-14.2). In conclusion, mothers generally repeated the DEBF of their previous child. For third children, DEBF of the second child was more likely to be repeated than that of the first child.

Predictors of breastfeeding exclusivity in a WIC sample

OBJECTIVE

To examine predictors of breastfeeding exclusivity in low-income women who received services from a Chicago area clinic of the Special Supplemental Nutrition Program for Women, Infants and Children Program (WIC).

DESIGN

A secondary data analysis of existing clinical and administrative data.

SETTING

An urban community health center serving low-income families.

PARTICIPANTS

Two hundred and thirty-five (235) low-income women who initiated breastfeeding and received WIC services.

METHODS

Logistic regression models were fit to existing prenatal and postpartum data to determine predictors of breastfeeding exclusivity during the immediate postpartum period.

RESULTS

Only 23% of the sample breastfed exclusively. Women who received first-trimester prenatal care were more likely to exclusively breastfeed than women who entered prenatal care in later trimesters (OR = 2.02, p ≤ 0.05). Women who declared intentions prenatally to exclusively breastfeed were more likely to exclusively breastfeed than women who did not intend to breastfeed (OR = 3.85, p ≤ 0.001). Overweight/obese women were less likely to exclusively breastfeed than normal/underweight women (OR = 0.50, p ≤ 0.05).

CONCLUSION

Findings from this study can be used to develop tailored interventions to promote breastfeeding exclusivity among low-income WIC recipients.

Higher parity and shorter breastfeeding duration: association with triple-negative phenotype of breast cancer

BACKGROUND

The combination of increased parity and shorter breastfeeding duration might increase the odds of the least differentiated triple-negative breast cancer (BC) phenotype, theoretically because an expanded progenitor cell population from each pregnancy would incompletely differentiate postpartum.

METHODS

Subjects consisted of a consecutive case series of 2473 women treated for invasive breast cancer between 2001 and 2006. Breast cancer phenotype (triple-negative BC, vs non-triple-negative BC) was compared with reproductive and demographic information. Odds ratios (OR) with 95% confidence intervals (CIs) for the association of breastfeeding duration (months per child) and parity with triple-negative BC were calculated after adjusting for ethnicity, age at menarche, family history, and age at diagnosis.

RESULTS

Compared with non-triple-negative BC, triple-negative BC was associated with shorter duration of breastfeeding per child (OR, 0.93; 95% CI, 0.90-0.97) and with higher parity (OR, 1.12; 95% CI, 1.06-1.20). By using multivariate logistic regression, triple-negative BC was independently associated with higher parity (OR, 2.76 [95% CI, 1.86-4.08] if ≥3 live births; OR, 1.89 [95% CI, 1.30-2.74] if ≤2 live births vs nulliparae), breastfeeding duration (OR, 0.55 [95% CI, 0.41-0.74] if >2 mo/child and OR, 0.58 [95% CI, 0.42-0.82] if ≤2 mo/child vs none), African American ethnicity (OR, 2.10; 95% CI, 1.52-2.92), and younger age at diagnosis (OR, 3.02 [95% CI, 2.03-4.47] if ≤40 years vs >60 years).

CONCLUSIONS

Among women with invasive breast cancer, higher parity and the absence or short duration of breastfeeding were independently associated with triple-negative BC. Any duration of breastfeeding was found to be associated with lower probability of triple-negative BC, and the odds of this phenotype decreased with increasing duration of breastfeeding.

U.S. Maternally linked birth records may be biased for Hispanics and other population groups

PURPOSE

We sought to advance understanding of linkage error in U.S. maternally linked datasets and how the error might affect results of studies based on the linked data.

METHODS

North Carolina birth and fetal death records for 1988-1997 were maternally linked (n=1,030,029). The maternal set probability, defined as the probability that all records assigned to the same maternal set do in fact represent events to the same woman, was used to assess differential maternal linkage error across race/ethnic groups.

RESULTS

Maternal set probabilities were lower for records specifying Asian or Hispanic race/ethnicity, suggesting greater maternal linkage error for these sets. The lower probabilities for Hispanics were concentrated in women of Mexican origin who were not born in the United States.

CONCLUSIONS

Differential linkage error may be a source of bias in studies that use U.S. maternally linked datasets to make comparisons between Hispanics and other groups or among Hispanic subgroups. Methods to quantify and adjust for this potential bias are needed.

Breastfeeding status on US birth certificates: where do we go from here?

OBJECTIVES

The objectives of this study were to assess the extent to which states collected breastfeeding data on the birth certificate, to verify the wording of the breastfeeding questions used, and to develop recommendations for future revisions of the breastfeeding question asked on the US Standard Certificate of Live Birth.

METHODS

Registrars of vital statistics in US states and territories were contacted via telephone with e-mail follow-up between April 2006 and May 2008 to determine whether their state/territory collected breastfeeding data on its birth certificate. Responses were categorized as follows: (1) breastfeeding data currently collected; (2) breastfeeding data not currently collected but implementation date set; or (3) breastfeeding data not currently collected and no implementation plans.

RESULTS

In May 2008, 56.6% (30 of 53) of US states and territories were collecting data on breastfeeding status at hospital discharge on their birth certificate. The questions used to collect breastfeeding data, however, had not been standardized. Approximately one quarter (12 of 53) reported that they were not yet collecting breastfeeding data on their birth certificate but that an implementation date had been set. Approximately one fifth (11 of 53) indicated that their state birth certificate did not plan to collect breastfeeding data by January 2010.

CONCLUSIONS

A total of 79% of the registrars reported that breastfeeding data were collected on the birth certificate or that the process would begin within the next 2 years. Future revisions to the Standard Certificate of Live Birth breastfeeding question should assess breastfeeding exclusivity. The revision process should include feedback from health professionals who collect these data, pretesting of the revised question for feasibility, and extensive training before data collection.

Birth order and breastfeeding initiation: results of a national survey

BACKGROUND

Because of numerous health benefits for both mothers and babies, breastfeeding is the recommended method of infant feeding. We sought to determine the association between birth order and breastfeeding practices in families with multiple children.

METHODS

The 2002 National Survey of Family Growth was used to analyze the demographic characteristics of a national probability sample of 2,115 U.S. mothers aged 15 to 44 with two, three, four, and five or more children younger than age 19. In-person, computer-assisted interviews were conducted by trained female interviewers. The main variable of interest was birth order; the main outcome measure was breastfeeding initiation for each mother-child pair. We used multiple logistic regression models to determine the demographic predictors of breastfeeding the second child in families with two children.

RESULTS

Mothers with two, three, four, and five or more children breastfed all of their children 52.6%, 48.4%, 44.7%, and 57.1% of the time, respectively (p = 0.46). In families with multiple children, more than 70% of women made the same feeding choice for each of their children, whether it was breastfeeding or bottlefeeding. After controlling for demographic factors, Hispanic women and women with more than a high school education were significantly more likely to breastfeed their second child if they had breastfed the first child.

CONCLUSION

U.S. mothers are likely to choose the same feeding method for each of their children, independent of the number of children they have. Breastfeeding promotion must take into consideration previous infant feeding experiences, if any.

Early postpartum breastfeeding and acculturation among Hispanic women

BACKGROUND

Exclusive breastfeeding in the hospital is predictive of postpartum breastfeeding patterns. Although breastfeeding rates are similar for Hispanic and white women in the United States, evidence shows that more acculturated Hispanic mothers have lower rates of breastfeeding than those less acculturated. To date, no studies have examined whether this pattern exists in the immediate postpartum period.

METHODS

We used medical record data from 1,635 participants in the San Diego Birth Center Study, a cohort study of low-income, low-risk pregnant women. We applied a proxy measure of acculturation to categorize participants into a low acculturation (Hispanic, Spanish speaking [n = 951]); high acculturation (Hispanic, English speaking [n = 408]); or white, English speaking (n = 276) group. Logistic regression was used to examine the relationship between acculturation and exclusive breastfeeding at the time of hospital discharge while controlling for potential confounders.

RESULTS

Exclusive breastfeeding rates were significantly different across acculturation groups (p < 0.01). After adjusting for available confounding variables, women in the low acculturation group were more likely to breastfeed exclusively at discharge than those in the high acculturation group (OR = 1.36, 95% CI = 1.01-1.84). Women in the white, English-speaking group also had greater odds of exclusive breastfeeding when compared with those in the high acculturation group (OR = 1.49, 95% CI = 1.02-2.19).

CONCLUSIONS

This cross-sectional study provides evidence of a correlation between acculturation and immediate postpartum breastfeeding, where higher acculturation is associated with lower odds of exclusive breastfeeding. Additional research is needed to understand how the process of acculturation may affect short- and long-term breastfeeding behavior.