Longer-Term Weight Loss Outcomes Are Not Primarily Driven by Diet Following Roux-en-Y Gastric Bypass and Sleeve Gastrectomy.

Metabolic and bariatric surgery (MBS) is the most effective long-term treatment for Class III obesity. Reduced dietary intake is considered a behavioral driver of post-surgical weight loss, but limited data have examined this association. Therefore, this study examined prospective, longitudinal relationships between dietary intake and weight loss over 24 months following Roux-en-Y Gastric Bypass and Sleeve Gastrectomy. Relationships between weight loss and dietary intake were examined using a validated 24-h dietary recall method. Associations between total energy/macronutrient intake and weight loss outcomes were assessed at 12-, 18-, and 24-months following MBS, defining patients as "responders" and "suboptimal responders". Consistent with previous literature, 12-month responders and suboptimal responders showed significant associations between weight loss and energy (p = 0.018), protein (p = 0.002), and total fat intake (p = 0.005). However, this study also revealed that many of these associations are no longer significant 24 months post-MBS (p > 0.05), despite consistent weight loss trends. This study suggests a short-term signal between these dietary factors and weight loss outcomes 12 months post-MBS; however, this signal does not persist beyond 12 months. These results are essential for interpreting and designing clinical studies measuring long-term post-surgical weight loss outcomes.

Associations Between Changes in Activity and Dietary Behaviors after Metabolic and Bariatric Surgery.

INTRODUCTION: Patients who undergo metabolic and bariatric surgery (MBS) are advised to make healthy activity and dietary changes. While previous research has examined post-surgical changes in activity and dietary behaviors separately, no study has assessed whether changes in these behaviors are beneficially associated with each other. We evaluated whether post-surgical improvements in activity behaviors related to favorable changes in dietary behaviors overall and by surgery type (Roux-en-Y gastric bypass [RYGB], sleeve gastrectomy [SG]). METHODS: At pre-surgery and 6- and 12-months post-surgery, participants (N = 97; 67 RYGB/30 SG) wore an accelerometer for 7 days and completed 24-h dietary assessments on 3 days. General linear models assessed associations between pre- to post-surgical changes in activity (moderate-to-vigorous physical intensity activity [MVPA], sedentary time [ST]) and dietary (total energy intake [EI; kcal/day], dietary quality [healthy eating index/HEI scores]) behaviors, with surgery type as a moderator. RESULTS: Participants on average: demonstrated small, non-significant post-surgical changes in MVPA and ST minutes/day (ps > .05); and reported significant post-surgical decreases in EI (p < .001), but no changes in HEI scores (ps > .25). Greater 12-month post-surgical increases in MVPA were significantly associated with greater decreases in EI, but only for RYGB participants (p < .001). DISCUSSION: Participants reported large decreases in EI, but made minimal changes in other behaviors after MBS. Results suggest greater increases in MVPA could assist with achieving greater decreases in EI, although this benefit appears to be limited to RYGB patients. Additional research is needed to confirm these findings and determine whether activity-dietary behavior associations differ beyond the immediate post-surgical year.

Deficits in cognitive control during alcohol consumption after bariatric surgery.

BACKGROUND: While bariatric surgery results in substantial weight loss, one negative side effect of surgery is that patients often experience more rapid and intense intoxication effects after consuming alcohol. OBJECTIVES: Given that alcohol use has been associated with impaired cognitive functioning in the general population, this study examined whether acute alcohol consumption after bariatric surgery immediately led to impaired cognitive control, and whether this effect was impacted by baseline levels of cognitive control. SETTING: Nonprofit teaching hospital, United States. METHODS: Participants were 34 adults who attended a laboratory visit before and 1 year after Roux-en-Y gastric bypass surgery, wherein they consumed a weight-based dose of alcohol and completed cognitive testing over the course of 3 hours. RESULTS: A series of generalized mixed-effect models demonstrated that performance on the cognitive task generally improved over time, likely due to practice effects. However, following bariatric surgery, individuals with impaired cognitive control before consuming alcohol experienced greater commission errors immediately afterward. CONCLUSIONS: These findings suggest that alcohol use after bariatric surgery may produce immediate deficits in inhibitory control among individuals who are already vulnerable to impaired cognitive control. Clinicians should seek to educate bariatric surgery candidates on this possible effect, as deficits in inhibitory control may ultimately lead to risky behaviors and poor adherence with postsurgical medical recommendations.

Psychotropic Medications in Metabolic and Bariatric Surgery: Research Updates and Clinical Considerations.

PURPOSE OF REVIEW: We review evidence for assessing and monitoring psychotropic medications in metabolic and bariatric surgery (MBS) patients. We describe weight gain side effects, potential perioperative risks, pharmacokinetic changes that occur after MBS, and conclude with clinical recommendations. RECENT FINDINGS: Research on psychiatric medication use and post-MBS weight outcomes is lacking and inconsistent; however, there is consistent evidence that, though variable, psychiatric medication use is associated with weight gain. Several meta-analyses and reviews provide guidance on lowering risk when appropriate. Perioperative lithium toxicity and SSRI discontinuation syndrome also warrant consideration, as do potential post-operative pharmacokinetic changes. In the absence of data for each psychiatric drug classification, close symptom monitoring and, where appropriate, serum concentration monitoring are recommended. MBS patients are a psychiatrically vulnerable population, and many are on psychiatric medications. Given potential weight/metabolic side effects, perioperative complications, and post-operative pharmacokinetic changes that occur with psychotropic medication use, providers should stay well informed on psychiatric medication management considerations.

Pain is adversely related to weight loss maintenance following bariatric surgery.

BACKGROUND: Pain and obesity are frequently co-morbid health conditions; thus, it is unsurprising that pain is commonly experienced by individuals seeking bariatric surgery. While pain is generally reduced in the short-term after surgery, there is also variability in pain outcomes and less is known about how unresolved or recurring pain may relate to long-term weight loss and weight loss maintenance. OBJECTIVES: This study evaluated trajectories of pain scores through 7 years following bariatric surgery and whether higher pain levels related to poorer weight loss and greater weight regain. SETTING: Data were collected from 3 university hospitals, 1 private not-for-profit research institute, and 1 community hospital. METHODS: Self-report measures of pain and weight change data were utilized for 1702 adults seeking Roux-en-Y gastric bypass surgery from the Longitudinal Assessment for Bariatric Surgery (LABS) cohort. A series of linear mixed models examined trajectories of pain scores and the concurrent predictive relationship between pain and weight outcomes from pre-surgery through 7 years post-surgery. RESULTS: Overall bodily-, hip-, and knee-pain improved through 2 years, deteriorated from 2-5 years, and then slightly improved from 5-7 years following surgery (P < .001). Greater pain was concurrently associated with less weight loss and greater weight regain over time (P ≤ .006). CONCLUSION: Pain is evident in the long-term following bariatric surgery and associated with suboptimal weight outcomes. More research is needed to identify mechanisms underlying this relationship, which may ultimately help develop appropriate pain assessment and treatment strategies to ensure optimal post-surgery outcomes.

Lisdexamfetamine Pharmacokinetic Comparison Between Patients Who Underwent Roux-en-Y Gastric Bypass and Nonsurgical Controls.

INTRODUCTION/PURPOSE: The objective of this research was to characterize the impact of Roux-en-Y gastric bypass (RYGB) on the pharmacokinetic properties of the pro-drug lisdexamfetamine and its active metabolite, d-amphetamine. MATERIALS AND METHODS: A case-control design was used where patients who had undergone RYGB 9-24 months prior were matched on sex, age, and body mass index (BMI) to nonsurgical controls who had no history of weight loss surgery. Each participant received a single 50 mg dose of lisdexamfetamine, and plasma samples were collected over a 24-h period following dosing. Noncompartmental analyses were used to compare pharmacokinetic measures between groups. RESULTS: There were no significant differences between the RYGB (n = 10) and NSC groups (n = 10) on sex (70% female), age (40.9 ± 9.6 vs. 41.3 ± 8.9 years), BMI (30.3 ± 5.2 vs. 31 ± 5.9 kg/m2), or ethnicity (100% vs. 80% White). The pharmacokinetic parameters between the RYGB and NCS groups were found to be equivalent for lisdexamfetamine and d-amphetamine, including maximum plasma concentration (Cmax), time to maximum plasma concentration (Tmax), and area under the plasma concentration-time curve (AUC(0-∞)). CONCLUSION: These data suggest that there is no need to routinely adjust lisdexamfetamine dosing following RYGB. However, given the potential for inter-individual differences, patients who undergo RYGB should be clinically monitored and individualized dosing strategies should be considered for concerns surrounding efficacy or toxicity.

A microbial signature following bariatric surgery is robustly consistent across multiple cohorts.

Bariatric surgery induces significant shifts in the gut microbiota which could potentially contribute to weight loss and metabolic benefits. The aim of this study was to characterize a microbial signature following Roux-en-Y Gastric bypass (RYGB) surgery using novel and existing gut microbiota sequence data. We generated 16S rRNA gene and metagenomic sequences from fecal samples from patients undergoing RYGB surgery (n = 61 for 16S rRNA gene and n = 135 for metagenomics) at pre-surgical baseline and one, six, and twelve-month post-surgery. We compared these data with three smaller publicly available 16S rRNA gene and one metagenomic datasets from patients who also underwent RYGB surgery. Linear mixed models and machine learning approaches were used to examine the presence of a common microbial signature across studies. Comparison of our new sequences with previous longitudinal studies revealed strikingly similar profiles in both fecal microbiota composition (r = 0.41 ± 0.10; p < .05) and metabolic pathways (r = 0.70 ± 0.05; p < .001) early after surgery across multiple datasets. Notably, Veillonella, Streptococcus, Gemella, Fusobacterium, Escherichia/Shigella, and Akkermansia increased after surgery, while Blautia decreased. Machine learning approaches revealed that the replicable gut microbiota signature associated with RYGB surgery could be used to discriminate pre- and post-surgical samples. Opportunistic pathogen abundance also increased post-surgery in a consistent manner across cohorts. Our study reveals a robust microbial signature involving many commensal and pathogenic taxa and metabolic pathways early after RYGB surgery across different studies and sites. Characterization of the effects of this robust microbial signature on outcomes of bariatric surgery could provide insights into the development of microbiome-based interventions for predicting or improving outcomes following surgery.

Naturalistic assessment of patterns and predictors of acute headache medication use among women with comorbid migraine and overweight or obesity.

Given the potential for obesity to complicate migraine treatment outcomes, there is a need to understand patterns and correlates of acute medication use among individuals with this comorbidity. Experience sampling methodology (ESM) was used to characterize patterns of acute medication use among those with migraine and overweight/obesity and to examine individual and momentary factors related to medication use (both migraine-specific and nonspecific medications). Women with migraine and overweight/obesity (N = 170) seeking behavioral migraine treatment completed questionnaires followed by 28 days of daily ESM headache diaries. Participants used medications to treat 71.9% of attacks, 20% of which were treated with migraine-specific medications. Participants were more likely to use medication in the context of longer and more severe attacks that started earlier in the day. Presence of aura and greater work-related pain interference uniquely related to migraine-specific medication use. Questionnaire-assessed factors were not related to medication use, although older age and higher educational attainment related to more frequent use. A substantial proportion of attacks were left untreated, suggesting unmet treatment needs in this population. Results also suggest that ESM-assessed factors are more salient correlates of medication use compared to questionnaires. Additional investigation of barriers to medication use is needed.

Obesity may contribute to more severe migraine symptoms and negatively impact migraine treatment outcomes. The present study aimed to understand patterns of acute medication use among 170 women with migraine and obesity who were seeking behavioral migraine treatment. Data were collected in participants' natural environment using experience sampling methodology, during which participants reported daily migraine symptoms for 4 weeks. Approximately, 30% of attacks were not treated with any medications, and one in five attacks (i.e., 20%) was treated with migraine-specific medication. Participants were more likely to use medication during longer and more severe attacks that started earlier in the day. Participants were also more likely to use migraine-specific medication when attacks were precipitated by an aura and associated with work-related pain interference. Questionnaire-assessed factors were not related to medication use, although older age and higher educational attainment related to more frequent use. In general, these results also suggest that naturalistically assessed factors are more salient correlates of medication use compared to questionnaires. Additional investigation of barriers to medication use is needed among younger individuals and those of lower socioeconomic status.

Trajectories of depressive symptoms and relationships with weight loss in the seven years after bariatric surgery.

INTRODUCTION: While depression generally improves after bariatric surgery, less is known regarding heterogeneity in long-term symptom change. Given that depressive symptoms have been associated with weight change following bariatric surgery, identifying and characterizing subgroups with more severe depressive symptoms may have prognostic utility for understanding post-surgical weight loss. This study sought to characterize patterns of change in depressive symptoms and evaluate associations with weight loss in the seven years following bariatric surgery. METHODS: Participants were 2308 patients who underwent bariatric surgery as part of the Longitudinal Assessment of Bariatric Surgery-2 (LABS-2) study. Depressive symptoms (measured by the Beck Depression Inventory) and weight were assessed annually following surgery. RESULTS: A group-based trajectory model identified six subgroups that evidenced distinct patterns of change in depressive symptoms, with the majority (87.0%) exhibiting stable low to average levels. Generalized linear mixed models indicated trajectory groups differed in percent total weight loss (%TWL), with trajectories characterized by initial decreases in depressive symptoms over the first two years (5.2% of participants) experiencing the highest %TWL (20.7% vs. 14.9-18.4% in the other trajectories at 7 years). CONCLUSIONS: Findings demonstrate meaningful heterogeneity in the pattern of changes in depressive symptoms after surgery. While most patients experience relatively low stable levels of depressive symptoms, those who have initial symptom improvement demonstrate the greatest magnitude of weight loss. Further research is necessary to explore the directionality of this association and the time-varying mechanisms by which depression and weight may mutually influence each other.

Treatment effects on pain catastrophizing and cutaneous allodynia symptoms in women with migraine and overweight/obesity.

OBJECTIVE: Pain catastrophizing and cutaneous allodynia represent two risk factors for greater headache-related disability. Yet, there is limited knowledge of the extent to which these risk factors are modifiable and whether nonpharmacological treatment-related changes are associated with migraine improvements. Using data from the Women's Health and Migraine (WHAM) study, a randomized controlled trial that compared effects of behavioral weight loss (BWL) and migraine education (ME) in women with migraine and overweight/obesity, we tested whether: (a) BWL versus ME produced greater changes in pain catastrophizing and allodynia from baseline across posttreatment and follow-up time points, and (b) whether these improvements were associated with improvements in headache disability. METHOD: Women (N = 110) were randomly assigned to 16 weeks of either BWL or ME and assessed at baseline, posttreatment, and follow up (32 weeks). Multilevel mixed effects modeling tested: (a) for between-groups differences in pain catastrophizing and allodynia changes over time, and (b) associations of changes in pain catastrophizing and allodynia with changes in headache disability, adjusting for migraine severity and weight loss. RESULTS: Both BWL and ME had significant reductions in pain catastrophizing and allodynia from baseline to posttreatment and follow up, and the improvements were comparable across conditions. Reductions in pain catastrophizing and cutaneous allodynia were associated with significant reductions in headache disability, even when controlling for intervention-related improvements in migraine and weight loss. CONCLUSION: Pain catastrophizing and allodynia are not only reduced after nonpharmacologic treatments for migraine, but greater improvements are associated with greater reductions in headache-related disability, independent of migraine severity. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Negative Affect and Loss of Control Eating Among Bariatric Surgery Patients: an Ecological Momentary Assessment Pilot Investigation.

BACKGROUND: Research shows that loss of control (LOC) eating impacts weight outcomes following bariatric surgery, but mechanisms explaining the development and/or maintenance of post-surgical LOC eating remain unclear. Ecological momentary assessment (EMA) research among eating disorder populations has demonstrated prospective relationships between negative affect (NA) and LOC eating; however, this momentary effect has not been examined among bariatric surgery patients. Thus, this study used EMA data to examine momentary relationships between NA and LOC eating among pre- and post-bariatric surgery patients. METHODS: Fourteen pre- and 17 post-RYGB patients completed 2 weeks of EMA data collection. Participants responded to seven signals daily wherein they rated their mood and severity of LOC eating. RESULTS: Higher momentary NA predicted more severe LOC eating for all participants. Group had a moderating effect, demonstrating that the association between NA and LOC eating was stronger among the post-surgery group. Percent total body weight loss (%TBWL) had a moderating effect within the post-surgery group, demonstrating that the relationship between NA and LOC eating was stronger for those who experienced less weight loss. Finally, between-subjects analyses revealed that, for individuals with lower %TBWL, lower overall NA and higher overall positive affect (PA) were related to greater LOC eating. CONCLUSIONS: This research demonstrates that affect influences the effect of LOC eating on weight loss following bariatric surgery. While further work is needed to extend these preliminary findings, this research suggests that affective experience might become an important target in the assessment and treatment of LOC eating among bariatric patients.

Patient Behaviors and Characteristics Related to Weight Regain After Roux-en-Y Gastric Bypass: A Multicenter Prospective Cohort Study.

OBJECTIVE: To identify patient behaviors and characteristics related to weight regain after Roux-en-Y gastric bypass surgery (RYGB). BACKGROUND: There is considerable variation in the magnitude of weight regain after RYGB, highlighting the importance of patient-level factors. METHODS: A prospective cohort study of adults who underwent bariatric surgery in 6 US cities between 2006 and 2009 included presurgery, and 6-month and annual assessments for up to 7 years. Of 1573 eligible participants, 1278 (81%) with adequate follow-up were included (80% female, median age 46 years, median body mass index 46 kg/m). Percentage of maximum weight lost was calculated each year after weight nadir. RESULTS: Weight was measured a median of 8 (25th-75th percentile, 7-8) times over a median of 6.6 (25th-75th percentile, 5.9-7.0) years. ß coefficients, that is, the mean weight regain, compared with the reference, and 95% confidence interval, are reported. Postsurgery behaviors independently associated with weight regain were: sedentary time [2.9% (1.2-4.7), for highest vs lowest quartile], eating fast food [0.5% (0.2-0.7) per meal/wk], eating when feeling full [2.9% (1.2-4.5)], eating continuously [1.6% (0.1-3.1)], binge eating and loss-of-control eating [8.0% (5.1-11.0) for binge eating; 1.6 (-0.1 to 3.3) for loss of control, vs neither], and weighing oneself

Eating Pathology After Bariatric Surgery: an Updated Review of the Recent Literature.

PURPOSE OF REVIEW: The goal of this paper was to extend the prior literature on eating pathology following bariatric surgery by highlighting themes in data published over the past 3 years and identifying limitations and future directions for research. RECENT FINDINGS: Changes in eating pathology after bariatric surgery remain consistent with previous research. Specifically, diagnostic prevalence rates and incidence of related behaviors generally decrease following surgery. However, some research supports that these factors increase and/or remit over time following surgery, and that they subsequently have a negative impact on weight loss outcomes. While recent findings have extended knowledge on eating pathology following bariatric surgery, the overall body of literature is still relatively limited. Additional research is needed, including work focusing on the standardization of eating pathology definitions, development/validation of standardized eating pathology instruments for bariatric surgery patients, and predictors of risk for continued or new onset eating pathology following surgery.

The relationship between childhood maltreatment and psychopathology in adults undergoing bariatric surgery.

BACKGROUND: A history of childhood maltreatment and psychopathology are common in adults with obesity. OBJECTIVES: To report childhood maltreatment and to evaluate associations between severity and type of childhood maltreatment and lifetime history of psychopathology among adults with severe obesity awaiting bariatric surgery. SETTING: Four clinical centers of the Longitudinal Assessment of Bariatric Surgery Research Consortium. METHODS: The Childhood Trauma Questionnaire, which assesses presence/severity (i.e., none, mild, moderate, severe) of physical abuse, mental abuse, physical neglect, mental neglect, and sexual abuse, was completed by 302 female and 66 male bariatric surgery patients. Presurgery lifetime history of psychopathology and suicidal ideation/behavior were assessed with the Structured Clinical Interview for DSM-IV and the Suicidal Behavioral Questionnaire-Revised, respectively. Presurgery lifetime history of antidepressant use was self-reported. RESULTS: Two thirds (66.6%) of females and 47.0% of males reported at least 1 form of childhood trauma; 42.4% and 24.2%, respectively, at greater than or equal to moderate severity. Among women, presence/greater severity of childhood mental or physical abuse or neglect was associated with a higher risk of history of psychopathology (i.e., major depressive disorder, posttraumatic stress disorder, other anxiety disorder, alcohol use disorder, binge eating disorder), suicidal ideation/behavior and antidepressant use (P for all ≤ .02). These associations were independent of age, race, education, body mass index, and childhood sexual abuse. Childhood sexual abuse was independently associated with a history of suicidal ideation/behavior and antidepressant use only (P for both ≤ .05). Statistical power was limited to evaluate these associations among men. CONCLUSION: Among women with obesity, presence/severity of childhood trauma was positively associated with relatively common psychiatric disorders.

Conception rates and contraceptive use after bariatric surgery among women with infertility: Evidence from a prospective multicenter cohort study.

BACKGROUND: Lack of prospective trials have resulted in a dearth of information regarding postbariatric surgery conception rates in women with a preoperative history of infertility. OBJECTIVE: To examine associations between preoperative history of infertility and postbariatric surgery conception. SETTING: A multicenter cohort study at 10 United States hospitals (2006-2009). METHODS: Participants completed a preoperative reproductive health questionnaire, with annual postoperative assessments for up to 7 years until January 2015. This report was restricted to women 18- to 44-years old with no history of menopause, hysterectomy, or hormone replacement therapy. The primary outcomes were postoperative (0 to <90 mo) conception rate, early conception rate (0 < 18 mo), and postoperative unprotected intercourse with a male partner while not trying to conceive. RESULTS: Of 740 eligible women, 650 (87.8%) provided required responses. Median interquartile range (IQR) preoperative age was 34 (30-39) years and follow-up was 6.5 (5.9-7.0) years. Nulliparous women with a preoperative history of infertility represented 8.0% (52/650) of the total cohort, 63.5% (33/52) of whom had never conceived. Compared with women without this history, these women had a higher postoperative conception rate (121.2 [95% confidence interval (CI), 102.3-143.5]/1000 versus 47.0 [95%CI, 34.2-62.9]/1000 woman-yr; P < .001), early conception rate (115.4 [95%CI, 96.1-138.5]/1000 versus 33.9 [95%CI, 23.6-47.1]/1,000 woman-yr; P < .01), and a higher risk of unprotected intercourse (ARR 1.48 [95% CI, 1.14-1.90], P = 0.003). CONCLUSION: After bariatric surgery, preoperative history of infertility and nulliparity was associated higher conception rates and unprotected intercourse.

Loss of Control Eating and Binge Eating in the 7 Years Following Bariatric Surgery.

BACKGROUND: Although bariatric surgery is an effective intervention for severe obesity, a subset of patients demonstrates suboptimal weight outcomes. Postoperative loss of control eating (LOCE) and binge eating may influence weight outcomes, though research has not examined differences by surgical procedure, or factors that predict postoperative LOCE. This study aimed to [1] characterize LOCE and binge eating disorder (BED) over a 7-year period following bariatric surgery; [2] examine concurrent, prospective, and cumulative relationships between LOCE and weight loss; [3] assess whether these associations are moderated by surgery type; and [4] evaluate predictors of LOCE. METHODS: Participants were 2156 patients who underwent laparoscopic adjustable gastric banding (LAGB) or Roux-n-Y gastric bypass (RYGB) in the multi-center Longitudinal Assessment of Bariatric Surgery-2 (LABS-2) study. Generalized linear mixed models examined relationships between LOCE and percent weight loss and predictors of LOCE. RESULTS: LOCE and BED initially declined then increased after surgery, with a notable number of de-novo cases (25.6% and 4.8%, respectively). LOCE was related to less concurrent but not prospective or cumulative percent weight loss. Self-monitoring of eating, higher daily eating frequency, older age, male gender, and higher self-esteem were associated with a lower likelihood of LOCE. CONCLUSIONS: Results suggest that LOCE and binge eating are clinically relevant behaviors that may impede weight loss, and findings highlight the importance of ongoing assessment of maladaptive eating following surgery.

Changes in Sexual Functioning in Women and Men in the 5 Years After Bariatric Surgery.

Importance: Short-term improvements in sexual functioning are reported after bariatric surgery, but to our knowledge, little is known about the durability of these improvements. Objective: To determine the percentage of adults with impairment in sexual functioning who experience durable improvements in sexual functioning after bariatric surgery and to identify factors associated with improvements. Design, Setting, and Participants: The Longitudinal Assessment of Bariatric Surgery-2 is an observational cohort study conducted at 10 hospitals in 6 US clinical centers. Adults undergoing their first bariatric procedure were recruited from 2005 through 2009, data were collected through August 2014. Data analysis was conducted from 2016 to April 2018. Interventions: Participants completed assessments before the procedure and annually thereafter for 5 years. Main Outcomes and Measures: A self-administered questionnaire was used to assess clinically meaningful differences before and after surgery in past-month sexual satisfaction, desire, and activity and physical health limitations to sexual activity among subgroups who reported sexual functioning at less than domain-specific thresholds before surgery. Results: Of 2215 participants eligible for sexual function follow-up, 2036 (91.9%) completed 1 or more follow-up assessment (1431 [64.6%] at year 5), of whom 1607 (78.9%) were women. At the presurgery assessment, median (interquartile range) age was 47 (37-55) years, and the median (interquartile range) body mass index was 45.8 (41.7-51.3). Among those who were not satisfied with their sexual life before surgery (1015 of 1456 women [69.7%]; 304 of 409 men [74.3%]), 56.0% of women (95% CI, 52.5%-59.5%) and 49.2% of men (95% CI, 42.4%-55.9%) experienced clinically meaningful improvements at year 1; these percentages did not significantly differ during further follow-up. Among those who reported physical limitations to sexual activity at baseline (892 of 1490 women [59.9%] and 267 of 406 men [65.8%]), the percentage experiencing improvement in this domain decreased during follow-up, but 73.6% (95% CI, 69.3%-78.0%) of women and 67.6% (95% CI, 59.6%-75.6%) of men continued to report improvements at year 5. Greater postsurgical reduction in depressive symptoms was independently associated with improvement in 4 domains of sexual life among women (frequency of sexual desire: adjusted relative risk [aRR] per 5-point decrease in Beck Depression Inventory score, 1.12 [95% CI, 1.07-1.18]; P < .001; frequency of sexual activity: aRR, 1.13 [95% CI, 1.08-1.18]; P < .001; the degree to which physical health limited sexual activity: aRR, 1.19 [95% CI, 1.14-1.23]; P < .001; and satisfaction with sexual life: aRR, 1.25 [95% CI, 1.19-1.31]; P < .001) and 2 domains among men (physical health limitations: aRR, 1.14 [95% CI, 1.04-1.26]; P = .008 and satisfaction with sexual life: aRR, 1.55 [95% CI, 1.33-1.81]; P < .001). Surgical procedure was not associated with improvement. Conclusions and Relevance: Per this study, approximately half of women and men who were not satisfied with their sexual life prior to bariatric surgery experienced improvements in satisfaction in 5 years of follow-up. Trial Registration: ClinicalTrials.gov Identifier: NCT00465829.

The Role of the Gut Microbiota in Sustained Weight Loss Following Roux-en-Y Gastric Bypass Surgery.

BACKGROUND: The aim of the study was to investigate the role of the gut microbiota in weight regain or suboptimal weight loss following Roux-en-Y gastric bypass (RYGB). MATERIALS AND METHODS: The gut microbiota composition in post-RYGB patients who experienced successful weight loss (SWL, n = 6), post-RYGB patients who experienced poor weight loss (PWL, n = 6), and non-surgical controls (NSC, n = 6) who were age- and BMI-matched to the SWL group (NSC, n = 6) were characterized through 16S rRNA gene sequencing. To further investigate the impact of the gut microbiota on weight profile, human fecal samples were transplanted into antibiotic-treated mice. RESULTS: Orders of Micrococcales and Lactobacillales were enriched in SWL and PWL groups compared to the NSC group. No significant difference was observed in the gut microbiota composition between PWL and SWL patients. However, transfer of the gut microbiota from human patients into antibiotic-treated mice resulted in significantly greater weight gain in PWL recipient mice compared to SWL recipient mice. A few genera that were effectively transferred from humans to mice were associated with weight gain in mice. Among them, Barnesiella was significantly higher in PWL recipient mice compared to SWL and NSC recipient mice. CONCLUSION: These results indicate that the gut microbiota are at least functionally, if not compositionally, different between PWL and SWL patients. Some taxa may contribute to weight gain after surgery. Future studies will need to determine the molecular mechanisms behind the effects of the gut bacteria on weight regain after RYGB.

Psychosocial functioning and quality of life in patients with loose redundant skin 4 to 5 years after bariatric surgery.

BACKGROUND: Bariatric surgery usually results in substantial weight loss and a reduction in medical comorbidities. Many patients, as a consequence of the weight loss, subsequently evidence loose, redundant skin. OBJECTIVES: This investigation seeks to examine the prevalence of body contouring surgery (BCS) by patients approximately 4 to 5 years after Roux-en-Y gastric bypass surgery. Demographics, change in BMI, and psychosocial variables were also used to predict body dissatisfaction, desire for BCS, and patients who reported obtaining BCS. SETTING: The clinical sites involved in the Longitudinal Assessment of Bariatric Surgery project, which included 10 hospitals across the United States. METHODS: The sample comprised 1159 patients who underwent Roux-en-Y gastric bypass and were enrolled in the Longitudinal Assessment of Bariatric Surgery-2 study. Participants were surveyed using the Excessive Skin Survey and other psychosocial measures at their 4- or 5-year postoperative outcome. The participants were predominately women (80.5%), Caucasian (88.3%), and middle-aged (mean = 46.1 yr, standard deviation = 11.11 yr). RESULTS: Participants reported modest degrees of being bothered by excessive skin, primarily in their waist/abdomen, thighs, and chest/breasts body areas. Only 11.2% of the sample had undergone any BCS procedure, and a majority of those participants paid "out of pocket" for BCS. Desire for BCS and body dissatisfaction 4 to 5 years postsurgery was associated with higher depression scores and poorer quality of life scores. CONCLUSIONS: Excessive skin is associated with poorer psychosocial functioning. Despite reporting modest levels of being bothered by excessive skin and body dissatisfaction, only a small fraction of participants underwent BCS. Cost of BCS was reported to be a primary barrier for not obtaining BCS. All rights reserved.

Effect of Bariatric Surgery on CKD Risk.

Obesity is linked to the development and progression of CKD, but whether bariatric surgery protects against CKD is poorly understood. We, therefore, examined whether bariatric surgery influences CKD risk. The study included 2144 adults who underwent bariatric surgery from March of 2006 to April of 2009 and participated in the Longitudinal Assessment of Bariatric Surgery-2 Study cohort. The primary outcome was CKD risk categories as assessed by the Kidney Disease Improving Global Outcomes (KDIGO) consortium criteria using a combination of eGFR and albuminuria. Patients were 79% women and 87% white, with a median age of 46 years old. Improvements were observed in CKD risk at 1 and 7 years after surgery in patients with moderate baseline CKD risk (63% and 53%, respectively), high baseline risk (78% and 56%, respectively), and very high baseline risk (59% and 23%, respectively). The proportion of patients whose CKD risk worsened was ≤10%; five patients developed ESRD. Sensitivity analyses using year 1 as baseline to minimize the effect of weight loss on serum creatinine and differing eGFR equations offered qualitatively similar results. Treatment with bariatric surgery associated with an improvement in CKD risk categories in a large proportion of patients for up to 7 years, especially in those with moderate and high baseline risk. These findings support consideration of CKD risk in evaluation for bariatric surgery and further study of bariatric surgery as a treatment for high-risk obese patients with CKD.