Intrapartum outcomes associated with change in body mass index category during pregnancy

BACKGROUND Although millions of overweight and obese adults use mobile phone apps for weight loss, little is known about the predictors of success. OBJECTIVE The objective of this study was to understand the relationship between weight loss outcomes and weekly patterns of caloric intake among overweight and obese adults using a mobile phone app for weight loss. METHODS We examined the relationship between weekly patterns of caloric intake and weight loss outcomes among adults who began using a weight loss app in January 2016 and continued consistent use for at least 5 months (N=7007). Unadjusted and adjusted linear regression analyses were used to evaluate the predictors of percentage of bodyweight lost for women and men separately, including age, body mass index category, weight loss plan, and difference in daily calories consumed on weekend days (Saturday and Sunday) versus Monday. RESULTS In adjusted linear regression, percentage of bodyweight lost was significantly associated with age (for women), body mass index (for men), weight loss plan, and differences in daily caloric intake on Mondays versus weekend days. Compared with women consuming at least 500 calories more on weekend days than on Mondays, those who consumed 50 to 250 calories more on weekend days or those with balanced consumption (±50 calories) lost 1.64% more and 1.82% more bodyweight, respectively. Women consuming 250 to 500 calories or more than 500 calories more on Mondays than on weekend days lost 1.35% more and 3.58% more bodyweight, respectively. Compared with men consuming at least 500 calories more on weekend days than on Mondays, those consuming 250 to 500 calories or more than 500 calories more on Mondays than on weekend days lost 2.27% and 3.42% less bodyweight, respectively. CONCLUSIONS Consistent caloric intake on weekend days and Mondays or consuming slightly fewer calories per day on Mondays versus weekend days was associated with more successful weight loss. CLINICALTRIAL ClinicalTrials.gov NCT03136692; https://clinicaltrials.gov/ct2/show/NCT03136692 (Archived by WebCite at http://www.webcitation.org/6y9JvHya4)

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Differences In Accelerometer Output Across Site Placement And Body Mass Index Category.

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000355030.22452.ce ◽

2009 ◽

Vol 41 ◽

pp. 155

Author(s):

Nora E. Miller ◽

Scott J. Strath ◽

Ann M. Swartz

Keyword(s):

Body Mass Index ◽

Body Mass ◽

Body Mass Index Category

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Overweight: The Body Mass Index Category With an Identity Crisis

Annals of Internal Medicine ◽

10.7326/m17-0566 ◽

2017 ◽

Vol 166 (9) ◽

pp. 671

Author(s):

Jean-Pierre Després

Keyword(s):

Body Mass Index ◽

Body Mass ◽

Body Mass Index Category ◽

Identity Crisis ◽

The Body

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Fecal Bacterial Communities Differ by Lactation Status in Post-Partum Women and Their Infants

Journal of Human Lactation ◽

10.1177/08903344211060343 ◽

2021 ◽

pp. 089033442110603

Author(s):

Eliot N. Haddad ◽

Lynn E. Ferro ◽

Kathleen E. B. Russell ◽

Kameron Y. Sugino ◽

Jean M. Kerver ◽

...

Keyword(s):

Body Mass Index ◽

Gut Microbiota ◽

Human Milk ◽

Body Mass ◽

Beta Diversity ◽

Bifidobacterium Longum ◽

Univariate Analysis ◽

Body Mass Index Category ◽

Fecal Samples ◽

Milk Feeding

Background: Previous research examined effects of human milk on the infant gut microbiota, but little attention has been given to the microbiota of lactating women. Research Aim: To determine associations between exclusive human milk feeding and gut microbiota characteristics in mothers and infants at 6-weeks postpartum. Methods: A sample of mother–infant dyads ( N = 24) provided fecal samples and questionnaire responses at 6-weeks postpartum as part of the Pregnancy, EAting & POstpartum Diapers study. Deoxyribonucleic acid was extracted from stool samples, followed by (V4) 16S ribosomal ribonucleic acid gene amplicon sequencing. Alpha and beta diversity, in addition to taxa differences, were compared by human milk exposure status, exclusive versus non-exclusive. A subset of dyads (those exclusively fed human milk; n = 14) was analyzed for shared bifidobacterial species using polymerase chain reaction. Results: Alpha diversity was significantly lower in exclusively human milk-fed infants. Maternal lactation status (exclusive vs. partial) and Shannon diversity were associated in univariate analysis but were no longer associated in multivariable regression including body mass index category in the model. Beta diversity (Sorensen dissimilarity) of fecal samples from women and infants was significantly associated with human milk feeding. Of six infants with Bifidobacterium longum subspecies longum in their fecal samples, all their mothers shared the same species. Conclusion: Maternal gut microbiotas differ by lactation status, a relationship potentially confounded by body mass index category. Further research is needed to identify whether lactation directly influences the maternal gut microbiota, which may be another mechanism by which lactation influences health.

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