Characteristics of the population eligible for and receiving publicly funded bariatric surgery in Canada

Bariatric Surgery Should Be Offered to Active-Duty Military Personnel: a Retrospective Study of the Canadian Armed Forces' Experience

PURPOSE

Like most Western armies, obesity affects Canadian Armed Forces (CAF) personnel. Bariatric surgery is an effective treatment for obesity. However, this is not yet accepted for active-duty soldiers in most countries. The CAF have approved bariatric surgery since 2005. Our aim is to assess weight loss, resolution of obesity-related comorbidities, and impacts of bariatric surgery on military careers.

MATERIALS AND METHODS

We retrospectively reviewed the perioperative data, long-term bariatric results, and military outcomes of 108 CAF active-duty military personnel who underwent bariatric surgery in Canada over a 61-month period.

RESULTS

The cohort was predominantly male (66.7%) with a mean preoperative body mass index (BMI) of 43.6 ± 5.8 kg/m². Roux-Y gastric bypass was performed in 59 patients, sleeve gastrectomy in 29, and gastric banding in 20. All the surgeries were performed laparoscopically. The total body weight loss at the last follow-up visit was 22.5 ± 11.0%. Remission or improvement of hypertension was observed in 91.2%, diabetes in 85.7%, gastroesophageal reflux disorder (GERD) in 43.6%, sleep apnea in 43.1%, and dyslipidemia in 42.9%. One patient (0.9%) was medically released due to postoperative complications. Fifteen patients (13.9%) were deployed postoperatively. The combined deployable and possibly deployable statuses increased from 35.4% preoperatively to 47.9% postoperatively.

CONCLUSION

This is the largest series of bariatric surgeries performed in active-duty military personnel. Bariatric surgery is effective and safe and improves deployability without impairing military careers. These results are relevant to the military of many industrialized countries. Bariatric surgery should be considered for all active-duty military personnel who meet surgical criteria for the treatment of obesity.

Perinatal outcomes after bariatric surgery

BACKGROUND

Bariatric surgery is a widely used treatment option for obesity that often provides long-term weight control and health benefits. Although a growing number of women are becoming pregnant after bariatric surgery, only a few population-based studies have assessed the impact thereof on perinatal outcomes.

OBJECTIVE

This study aimed to examine the association between bariatric surgery and adverse perinatal outcomes in pregnant women and to examine whether the risk for adverse perinatal outcomes is modified by the postsurgery weight, gestational weight gain, type of bariatric surgery, timing of pregnancy after bariatric surgery, and maternal comorbidities.

STUDY DESIGN

A retrospective cohort study was performed with the use of the Bariatric Surgery Registry and hospital inpatient and outpatient physician encounter records. The International Classification of Diseases, Ninth and Tenth Revision codes from hospitalizations during pregnancy and infant birth records were used to ascertain the outcomes of interest. Women eligible for BS who delivered at ≥20 weeks of gestation (n=20,213) at Kaiser Permanente Southern California hospitals (January 1, 2007 to December 31, 2018) were included in the study. Adjusted odds ratios were derived from logistic regression models with inverse probability of treatment weighting to adjust for confounding using propensity scores.

RESULTS

Bariatric surgery was associated with a reduction in the risks for gestational diabetes (adjusted odds ratio, 0.60; 95% confidence interval, 0.53-0.69; P<.001), preeclampsia (adjusted odds ratio, 0.53; 95% confidence interval, 0.46-0.61; P<.001), chorioamnionitis (adjusted odds ratio, 0.45; 95% confidence interval, 0.32-0.63; P<.001), cesarean delivery (adjusted odds ratio, 0.65; 95% confidence interval, 0.59-0.72; P<.001), large for gestational age neonate (adjusted odds ratio, 0.23; 95% confidence interval, 0.19-0.29; P<.001), macrosomia (adjusted odds ratio, 0.24; 95% confidence interval, 0.19-0.30; P<.001), and neonatal intensive care unit admission (adjusted odds ratio, 0.70; 95% confidence interval, 0.61-0.81; P<.001). However, bariatric surgery was also associated with a significantly increased risk for small for gestational age neonates (adjusted odds ratio, 2.46; 95% confidence interval, 2.16-2.79; P<.001). The risk for the adverse outcomes is independent of the time interval between the surgery and subsequent pregnancy.

CONCLUSION

These data suggest that there are many pregnancy outcome benefits for women with severe obesity who undergo bariatric surgery; however, women who have undergone bariatric surgery before pregnancy should be monitored closely to reduce the risk for small for gestational age neonates and postpartum hemorrhage.

Idiopathic intracranial hypertension and bariatric surgery: a systematic review

Background

Idiopathic intracranial hypertension (IIH) is a rare condition typically affecting women with obesity who are of child-bearing age. Patients commonly present with headaches, visual disturbances, pulsatile tinnitus and papilledema. The association between IIH and obesity has been well established in the literature, suggesting that weight loss may contribute to improving IIH. For patients with severe obesity for whom conservative management is not successful, bariatric surgery is an effective modality for weight loss. We aimed to systematically review the literature to determine the efficacy of bariatric surgery in the treatment of IIH

Methods

We conducted a comprehensive search of MEDLINE, Embase, Scopus, the Cochrane Library and Web of Science (limited to studies in humans published in English between January 1946 and July 2015).

Results

Twelve primary studies (n = 39 patients) were included in the systematic review. All patients had a preoperative diagnosis of IIH. Preoperative body mass index (BMI) was 47.4 ± 3.6 kg/m2 ; BMI improved to 33.7 ± 2.1 kg/m2 and 33.9 ± 11.6 kg/m2 at 6 and 12 months postoperatively, respectively. Lumbar puncture opening pressures decreased from 34.4 ± 6.9 cmH2O to 14.0 ± 3.6 cmH2O after surgery. Common symptoms of IIH improved after bariatric surgery: headaches (100% preoperatively v. 10% postoperatively), visual complaints (62% v. 44%), tinnitus (56% v. 3%) and papilledema (62% v. 8%).

Conclusion

Bariatric surgery appears to lead to considerable improvement in IIH. Idiopathic intracranial hypertension is not a well-publicized comorbidity of obesity, but its presence may be considered as an indication for bariatric surgery.

Early improvement in patient reported disability after bariatric surgery

BACKGROUND

Bariatric surgery is an effective intervention for managing morbid obesity. Little evidence has been reported regarding objective assessments of patient disability after surgery. The World Health Organization Disability Assessment Score 2.0 is a validated tool for assessing the level of disability after surgery, including assessment of difficulty with activities of daily living, social activities, and overall functioning.

OBJECTIVE

Evaluate patient disability after bariatric surgery at a tertiary care medical center.

SETTING

University hospital, United States.

METHODS

An institutional review board-approved prospective cohort study included patients undergoing primary bariatric surgery; patients undergoing a revisional procedure were excluded. Patient-reported disability was assessed using World Health Organization Disability Assessment Score 2.0, administered preoperatively and at 1 and 3 months after surgery. Disability scores (maximum of 48 reflecting extreme disability, minimum of 0) were analyzed for statistically significant trends.

RESULTS

One hundred ten patients enrolled in the study (76% female, 24% male) with 46% sleeve gastrectomy and 54% Roux-en-Y gastric bypass. Preoperative body mass index was 47.08 ± 7.6 (n = 110). The preoperative World Health Organization Disability Assessment Score scores were 6.66 ± 6.10 (n = 110). For those who completed both preoperative and 1-month surveys (n = 53), the scores were 6.60 ± 5.76 and 4.04 ± 4.68, respectively (P < .001). Those completing both preoperative and 3-month surveys (n = 53) had scores of 6.08 ± 5.48 and 2.38 ± 3.74, respectively (P < .001).

CONCLUSION

We report early improvement in disability with a validated tool at 1 and 3 months after bariatric surgery. This equates to global disability in this cohort improving from the 75th percentile of the population norm preoperatively to the 50th percentile at 3 months. Further studies are needed to determine if this is sustained long-term.

Predictive factors for diabetes remission after bariatric surgery

Background

Bariatric surgery has been shown to induce type 2 diabetes mellitus (T2DM) remission in severely obese patients. After laparoscopic Roux-en-Y gastric bypass (LRYGB), diabetes remission occurs early and independently of weight loss. Previous research has identified preoperative factors for remission, such as duration of diabetes and HbA1c. Understanding factors that predict diabetes remission can help to select patients who will benefit most from bariatric surgery.

Methods

We retrospectively reviewed all T2DM patients who underwent laparoscopic sleeve gastrectomy (LSG) or LRYGB between January 2008 and July 2014. The primary outcome was diabetes remission, defined as the absence of hypoglycemic medications, fasting blood glucose < 7.0 mmol/L and HbA1c < 6.5%. Data were analyzed using multivariable logistic regression analysis to identify predictive factors of diabetes remission.

Results

We included 207 patients in this analysis; 84 (40.6%) had LSG and 123 (59.4%) had LRYGB. Half of the patients (49.8%) achieved diabetes remission at 1 year. Multivariable logistic analysis showed that LRYGB had higher odds of diabetes remission than LSG (odds ratio [OR] 6.58, 95% confidence interval [CI] 2.79–15.50, p < 0.001). Shorter duration of diabetes (OR 0.91, 95% CI 0.83–0.99, p = 0.032) and the absence of long-acting insulin (OR 0.0011, 95% CI < 0.000–0.236, p = 0.013) predicted remission.

Conclusion

Type of bariatric procedure (LRYGB v. LSG), shorter duration of diabetes and the absence of long-acting insulin were independent predictors of diabetes remission after bariatric surgery.

Canadian consensus statement: enhanced recovery after surgery in bariatric surgery

BACKGROUND

In Canada, bariatric surgery continues to remain the most effective treatment for severe obesity and its comorbidities. As the number of bariatric surgeries continues to grow, the need for consensus guidelines for optimal perioperative care is imperative. In colorectal surgery, enhanced recovery after surgery (ERAS) protocols were created for this purpose. The objective of this review is to develop evidence-based ERAS guidelines for bariatric surgery.

METHODS

A literature search of the MEDLINE database was performed using ERAS-specific search terms. Recently published articles with a focus on randomized controlled trials, systematic reviews, and meta-analyses were included. Quality of evidence and recommendations were evaluated using the GRADE assessment system.

RESULTS

Canadian bariatric surgeons from six provinces and ten bariatric centers performed a review of the evidence surrounding ERAS in bariatric surgery and created consensus guidelines for 14 essential ERAS elements. Our main recommendations were (1) to encourage participation in a presurgical weight loss program; (2) to abstain from tobacco and excessive alcohol; (3) low-calorie liquid diet for at least 2 weeks prior to surgery; (4) to avoid preanesthetic anxiolytics and long-acting opioids; (5) unfractionated or low-molecular-weight heparin prior to surgery; (6) antibiotic prophylaxis with cefazolin ± metronidazole; (7) reduced opioids during surgery; (8) surgeon preference regarding intraoperative leak testing; (9) nasogastric intubation needed only for Veress access; (10) to avoid abdominal drains and urinary catheters; (11) to prevent ileus by discontinuing intravenous fluids early; (12) postoperative analgesia with acetaminophen, short-term NSAIDS, and minimal opioids; (13) to resume full fluid diet on first postoperative day; (14) early telephone follow-up with full clinic follow-up at 3-4 weeks.

CONCLUSIONS

The purpose of addressing these ERAS elements is to develop guidelines that can be implemented and practiced clinically. ERAS is an excellent model that improves surgical efficiency and acts as a common perioperative pathway. In the interim, this multimodal bariatric perioperative guideline serves as a common consensus point for Canadian bariatric surgeons.

Factors affecting access and use of preventive and weight management care: A public health lens

Obesity is an important risk factor for various chronic diseases. While people with obesity use the health system more and incur higher costs, they may forego using preventive care services (e.g., gynecological cancer screenings) due to issues of service use and service access. The aim of this paper was to use a public health lens to elucidate system level factors that affect healthcare access and utilization for preventive and weight management care by patients with obesity. Some elucidated factors include lack of access to a Primary Care Provider (PCP) and multidisciplinary healthcare settings, gender of the PCP, duration of medical visits and health professionals' attitudes about obesity. We highlight potential strategies for leaders to use when improving access and use of health services by patients with obesity in Canada and the need for future empirical studies in this research area.

Socioeconomic factors, body mass index and bariatric surgery: a Swedish nationwide cohort study

BACKGROUND

Bariatric surgery is considered to be the most effective method of weight loss today. The aim of the present Swedish study, which was performed in a country that has universal health care, was to investigate if there is an association between socioeconomic factors and bariatric surgery by taking body mass index (BMI) into account.

METHODS

In this prospective cohort study, BMI data were collected for the period 1985-2010 from the Military Service Conscription Register (for men) and from the Medical Birth Register in the first trimester (for women). The follow-up period started in 2005 and continued until 2012. Age-standardized cumulative incidence rates (CR) of bariatric surgery were compared between different BMI groups by considering individual variables. We analyzed the association between the individual variables and bariatric surgery using Cox proportional hazard models.

RESULTS

In the study population of 814,703 women and 787,027 men, a total of 7433 women and 1961 men underwent bariatric surgery. In women, the hazard ratios (HRs) for bariatric surgery were higher for low and middle income and educational levels, compared to high income and educational levels. In men, the highest HR for bariatric surgery was found among those with a high income. The HRs when comparing the different socioeconomic groups in those with BMI > 40 kg/m2 showed no significant results, except for middle education in women.

CONCLUSION

Differences in bariatric surgery between socioeconomic groups were found, favoring those with a low socioeconomic status. However, very few socioeconomic differences were found amongst those who had a BMI > 40 kg/m2. This indicates that the Swedish healthcare system seems to have achieved equal access to health care for bariatric surgery.

Occupational Performance Issues of Adults Seeking Bariatric Surgery for Obesity

OBJECTIVE

We sought to describe the occupational performance issues of a sample of bariatric surgery candidates and to explore the relationships among occupational performance, satisfaction with performance, demographic characteristics, and mental health factors.

METHOD

We reviewed the health records of 241 bariatric surgery candidates and analyzed their scores on the Canadian Occupational Performance Measure (COPM) and standardized mental health questionnaires.

RESULTS

Exercise and eating behavior were the most common occupational performance issues. Cognitive and affective issues were reported more frequently than physical issues. Occupational performance and satisfaction correlated negatively with anxiety and depression and positively with self-esteem. Self-esteem contributed 27% of the variance in occupational performance.

CONCLUSION

COPM scores revealed a wide range of occupational performance issues and significant associations with mental health factors, supporting a psychosocial approach to occupational therapy with this population. Routine mental health screening can help ensure that mental health factors are adequately addressed.

Population estimates and characteristics of Australians potentially eligible for bariatric surgery: findings from the 2011–13 Australian Health Survey

Objective The aim of the present study was to determine the potential demand for publicly and privately funded bariatric surgery in Australia. Methods Nationally representative data from the 2011–13 Australian Health Survey were used to estimate the numbers and characteristics of Australians meeting specific eligibility criteria as recommended in National Health and Medical Research Council guidelines for the management of overweight and obesity. Results Of the 3 352 037 adult Australians (aged 18–65 years) estimated to be obese in 2011–13, 882 441 (26.3%; 95% confidence interval (CI) 23.0–29.6) were potentially eligible for bariatric surgery (accounting for 6.2% (95% CI 5.4–7.1) of the adult population aged 18–65 years (n = 14 122 020)). Of these, 396 856 (45.0%; 95% CI 40.4–49.5) had Class 3 obesity (body mass index (BMI) ≥40 kg m–2), 470945 (53.4%; 95% CI 49.0–57.7) had Class 2 obesity (BMI 35–39.9 kg m–2) with obesity-related comorbidities or risk factors and 14 640 (1.7%; 95% CI 0.6–2.7) had Class 1 obesity (BMI 30–34.9 kg m–2) with poorly controlled type 2 diabetes and increased cardiovascular risk; 458 869 (52.0%; 95% CI 46.4–57.6) were female, 404 594 (45.8%; 95% CI 37.3–54.4) had no private health insurance and 309 983 (35.1%; 95% CI 28.8–41.4) resided outside a major city. Conclusion Even if only 5% of Australian adults estimated to be eligible for bariatric surgery sought this intervention, the demand, particularly in the public health system and outside major cities, would far outstrip current capacity. Better guidance on patient prioritisation and greater resourcing of public surgery are needed. What is known about this topic? In the period 2011–13, 4 million Australian adults were estimated to be obese, with obesity disproportionately more prevalent in areas of socioeconomic disadvantage. Bariatric surgery is considered to be cost-effective and the most effective treatment for adults with obesity, but is mainly privately funded in Australia (>90%), with 16 650 primary privately funded procedures performed in 2015. The extent to which the supply of bariatric surgery is falling short of demand in Australia is unknown. What does this paper add? The present study provides important information for health service planners. For the first time, population estimates and characteristics of those potentially eligible for bariatric surgery in Australia have been described based on the best available evidence, using categories that best approximate the national recommended eligibility criteria. What are the implications for practitioners? Even if only 5% of those estimated to be potentially eligible for bariatric surgery in Australia sought a surgical pathway (44 122 of 882 441), the potential demand, particularly in the public health system and outside major cities, would still far outstrip current capacity, underscoring the immediate need for better guidance on patient prioritisation. The findings of the present study provide a strong signal that more funding of public surgery and other effective interventions to assist this population group are necessary.

Morbidity and health-related quality of life of patients accessing laparoscopic sleeve gastrectomy: a single-centre cross-sectional study in one province of Canada

Background

In Canada, severe obesity (BMI ≥ 35 kg/m²) affects 5% or 1.2 million adults. Bariatric surgery is the only effective treatment for severe obesity, but the demand for publicly funded procedures is high and capacity limited. Little is known in Canada about the types of patients undergoing these procedures, especially laparoscopic sleeve gastrectomy (LSG). The study objective is to examine the socio-demographic profile, morbidity and HRQoL of patients accessing LSG in one Canadian province.

Methods

Health status and HRQoL were examined in patients (n = 195) undergoing LSG. HRQoL was assessed using the EQ-5D-3L, SF-12v2 and the Impact of Weight on Quality of Life-lite questionnaire.

Results

Mean age and BMI were 44 and 49 kg/m² and most were women (82%). Pre-surgery, comorbidities were sleep apnea (65%), dyslipidemia (48%), hypertension (47%) and osteoarthritis (44%). Patients reported impaired HRQoL with 44-67% reporting problems in mobility, usual activities, pain and anxiety/depression. Physical health was impaired more than mental health. There were few socio-demographic differences between women and men, but significant differences in comorbid conditions such as sleep apnea, dyslipidemia, hypertension and gout exist (p < .05). Women reported fewer problems with self-care (9.5% vs. 25.0%, p < .05), and better overall health (VAS 61.5 vs. 52.0, p < .05) and General Health (39.3 vs. 32.9, p < .05), but greater impairment in self-esteem (27.3 vs. 44.1, p < .01) and sexual life (49.2 vs. 63.6, p < .05).

Conclusions

Before LSG, patients reported significant morbidity and impaired HRQoL. Although baseline characteristics were similar between men and women, gender specific differences were observed in comorbid profile and HRQoL.

MILEPOST Multicenter Randomized Controlled Trial: 12-Month Weight Loss and Satiety Outcomes After pose SM vs. Medical Therapy

BACKGROUND

Pose ^SM is an endolumenal weight-loss intervention in which suture anchors are placed endoscopically in the gastric fundus/distal gastric body. Observational studies of pose have shown safe, effective weight loss. Twelve-month results of a randomized controlled trial comparing weight loss and satiety after pose vs. conventional medical therapy are reported.

METHODS

Subjects with classes I-II obesity were randomized in a 3:1 ratio to pose or diet/exercise guidance only (control). Pose subjects received gastric fundus and distal body suture-anchor plications with diet/exercise counseling. Total body (%TBWL) and excess weight loss (%EWL) were assessed at 6 and 12 months. Analysis of covariance (ANCOVA) was used to analyze 12-month %TBWL. Satiety changes were assessed at 6 and 12 months.

RESULTS

From November 2013 to July 2014, 44 subjects were randomized (34, 77.3 % female; mean age, 38.3 ± 10.7 years; body mass index, 36.5 ± 3.4 kg/m²) to pose (n = 34) or control (n = 10) groups in three centers. Mean pose procedure time was 51.8 ± 14.5 min; pose subjects received a mean 8.8 ± 1.3 fundal and 4.2 ± 0.7 distal body plications. Twelve-month TBWL: pose, 13.0 % (EWL, 45.0 %), n = 30 vs. control group, 5.3 % (18.1 %), n = 9; significant mean difference, 7.7 % (95 % CI 2.2, 13.2; p < 0.01). Pose subjects showed significant reductions in satiety parameters (p < 0.001); controls experienced reduced caloric intake and satiety volume (p < 0.05). No serious device- or procedure-related adverse events occurred.

CONCLUSIONS

In a randomized controlled trial at 12 months, pose-treated subjects had significantly greater weight loss than those treated with diet/exercise guidance alone. At 6 and 12 months, pose subjects showed significant reduction in satiety parameters.

STUDY REGISTRATION

clinicaltrials.gov identifier # NCT01843231.

Influence of social deprivation on provision of bariatric surgery: 10-year comparative ecological study between two UK specialist centres

OBJECTIVE

To investigate the effect of residential location and socioeconomic deprivation on the provision of bariatric surgery.

DESIGN

Retrospective cross-sectional ecological study.

SETTING

Patients resident local to one of two specialist bariatric units, in different regions of the UK, who received obesity surgery between 2003 and 2013.

METHODS

Demographic data were collected from prospectively collected databases. Index of Multiple Deprivation (IMD 2010) was used as a measure of socioeconomic status. Obesity prevalences were obtained from Public Health England (2006). Patients were split into three IMD tertiles (high, median, low) and also tertiles of time. A generalised linear model was generated for each time period to investigate the effect of socioeconomic deprivation on the relationship between bariatric case count and prevalence of obesity. We used these to estimate surgical intervention provided in each population in each period at differing levels of deprivation.

RESULTS

Data were included from 1163 bariatric cases (centre 1-414, centre 2-749). Incidence rate ratios (IRRs) were calculated to measure the associations between predictor and response variables. Associations were highly non-linear and changed over the 10-year study period. In general, the relationship between surgical case volume and obesity prevalence has weakened over time, with high volumes becoming less associated with prevalence of obesity.

DISCUSSION

As bariatric services have matured, the associations between demand and supply factors have changed. Socioeconomic deprivation is not apparently a barrier to service provision more recently, but the positive relationships between obesity and surgical volume we would expect to find are absent. This suggests that interventions are not being taken up in the areas of need. We recommend a more detailed national analysis of the relationship between supply side and demand side factors in the provision of bariatric surgery.

Comparative effectiveness and safety of gastric bypass, sleeve gastrectomy and adjustable gastric banding in a population-based bariatric program: prospective cohort study

BACKGROUND

Bariatric surgery in Canada is primarily delivered within publicly funded specialty clinics. Previous studies have demonstrated that bariatric surgery is superior to intensive medical management for reduction of weight and obesity-related comorbidities. Our objective was to compare the effectiveness and safety of laparoscopic Roux-en-Y gastric bypass (RYGB), sleeve gastrectomy (LSG) and adjustable gastric banding (LAGB) in a publicly funded, population-based bariatric treatment program.

METHODS

We followed consecutive bariatric surgery patients for 2 years. The primary outcome was weight change (in kilograms). Between-group changes were analyzed using multivariable regression. Last-observation-carried-forward imputation was used for missing data.

RESULTS

We included 150 consecutive patients (51 RYGB; 51 LSG; 48 LAGB) in our study. At baseline, mean age was 43.5 ± 9.5 years, 87.3% of patients were women, and preoperative body mass index (BMI) was 46.2 ± 7.4. Absolute and relative (% of baseline) weight loss at 2 years were 36.6 ± 19.5 kg (26.1 ± 12.2%) for RYGB, 21.4 ± 16.0 kg (16.4 ± 11.6%) for LSG and 7.0 ± 9.7 kg (5.8 ± 7.9%) for LAGB (p < 0.001). Change in BMI was greater for the RYGB (-13.0 ± 6.6) than both the LSG (-7.6 ± 5.7) and the LAGB (-2.6 ± 3.5) groups (p < 0.001). The reduction in diabetes, hypertension and dyslipidemia was greater after RYGB than after LAGB (all p < 0.05). There were no deaths. The anastomotic and staple leakage rate was 1.3%.

CONCLUSION

In a publicly funded, population-based bariatric surgery program, RYGB and LSG demonstrated greater weight loss than the LAGB procedure. Bypass resulted in the greatest reduction in obesity-related comorbidities. All procedures were safe.

The evaluating self-management and educational support in severely obese patients awaiting multidisciplinary bariatric care (EVOLUTION) trial: principal results

BACKGROUND

In Canada, demand for multidisciplinary bariatric (obesity) care far outstrips capacity. Consequently, prolonged wait times exist that contribute to substantial health impairments. A supportive, educational, self-management intervention (with in-person and web-based versions) for patients wait-listed for bariatric care has already been implemented in Northern and Central Alberta, Canada, but its effectiveness is unknown. The objective of this trial is to evaluate the clinical and economic outcomes of two self-management programs of varying intensity that are currently in use.

METHODS

We conducted a pragmatic, prospective, parallel-arm, randomized controlled trial of 651 wait-listed patients from two regional bariatric programs. Patients were randomized to (1) an in-person, group-based intervention (13 sessions; n = 215) or (2) a web-based intervention (13 modules; n = 225) or (3) control group (printed educational materials; n = 211). After randomization, subjects had 3 months to review the content assigned to them (the intervention period) prior to bariatric clinic entry. The primary outcome was the proportion of patients achieving 5% weight loss at 9 months. Intention-to-treat two-way comparisons were performed and adjusted for baseline age, sex, site and body mass index.

RESULTS

At baseline, mean age was 40.4 ± 9.8 years, mean weight was 134.7 ± 25.2 kg, mean body mass index was 47.7 ± 7.0 kg/m² and 83% of participants were female. A total of 463 patients (71%) completed 9 months follow-up. At least 5% weight loss was achieved by 24.2% of those in the in-person strategy, 24.9% for the web-based strategy and 21.3% for controls (adjusted p value = 0.26 for in-person vs. controls, 0.28 for web-based vs. controls, 0.96 for in-person vs. web-based). Absolute and relative (% of baseline) mean weight reductions were 3.7 ± 7.1 kg (2.7 ± 5.4%) for in-person strategy, 2.8 ± 6.7 kg (2.0 ± 4.8%) for web-based and 2.9 ± 8.8 kg (1.9 ± 5.9%) for controls (p > 0.05 for all comparisons). No between-group differences were apparent for any clinical or humanistic secondary outcomes. Total annual costs in Canadian dollars were estimated at $477,000.00 for the in-person strategy, $9456.78 for the web-based strategy and $2270.31 for provision of printed materials.

DISCUSSION

Two different self-management interventions were no more effective and were more costly than providing printed education materials to severely obese patients. Our findings underscore the need to develop more potent interventions and the importance of comprehensively evaluating self-management strategies before widespread implementation.

TRIAL REGISTRATION

ClinicalTrials.gov, NCT01860131 . Registered 17 May 2013.

Critical review of bariatric surgery, medically supervised diets, and behavioural interventions for weight management in adults

AIMS

Patient selection of weight management treatment option is often guided by a variety of factors. Currently, there is no comprehensive tool to facilitate informed decision-making for patients and clinicians. This article aims to synthesise evidence on the treatment effectiveness, health benefits, risks, and patient experiences of treatment options presently available at the Weight Management Clinic at The Ottawa Hospital (TOH), as a first step towards developing a decision aid.

METHODS

Narrative and systematic reviews published in English between 1999 and 2014 were included that focused on one or more of the following weight management treatments in adults aged 18 years and over: roux-en-y gastric bypass (RYGB), sleeve gastrectomy (SG), medically supervised meal replacement, and behavioural or lifestyle intervention.

RESULTS

Overall, bariatric surgeries have received the greatest research attention and have been associated not only with greater weight loss and health benefit but also with greater risks, complications, and financial cost. Dietary programmes demonstrated weight loss and health benefits to a lesser extent than with surgery but were associated with lower and shorter-term risks and complications. Behavioural and lifestyle interventions have been studied less yet have shown significant, albeit small, weight loss outcomes alone and in combination with dietary or surgical options; they also appear to be the lowest risk interventions. Patient experiences of weight management options are mixed and not well understood.

CONCLUSION

Further research is needed; however, this review identified some general trends related to weight loss outcomes, benefits, risks, and barriers for weight management options that have implications for shared treatment decision-making.

The use of adjustable gastric bands for management of severe and complex obesity

BACKGROUND

Obesity levels in the UK have reached a sustained high and ∼4% of the population would be candidates for bariatric surgery based upon current UK NICE guidelines, which has important implications for Clinical Commissioning Groups.

SOURCES OF DATA

Summary data from Cochrane systematic reviews, randomized controlled trials (RCTs) and cohort studies.

AREAS OF AGREEMENT

Currently, the only treatment that offers significant and durable weight loss for those with severe and complex obesity is surgery. Three operations account for 95% of all bariatric surgery in the UK, but the NHS offers surgery to only a small fraction of those who could benefit. Laparoscopic adjustable gastric banding (gastric banding) has potentially the lowest risk and up-front costs of the three procedures.

AREAS OF CONTROVERSY

Reliable Level 1 evidence of the relative effectiveness of the operations is lacking.

GROWING POINTS

As a point intervention, weight loss surgery together with the chronic disease management strategy for obesity can prevent significant future disease and mortality, and the NHS should embrace both.

AREAS TIMELY FOR DEVELOPING RESEARCH

Better RCT evidence is needed including clinical effectiveness and economic analysis to answer the important question 'which is the best of the three operations most frequently performed?' This review considers the current evidence for gastric banding for the treatment of severe and complex obesity.

Interest, views and perceived barriers to bariatric surgery in patients with morbid obesity

The objective of the study was to assess the interest, views and patient-perceived barriers to bariatric surgery among surgery-eligible patients. Surveys were completed at a weight management clinic and local hospital in Ontario, Canada. Patients were ≥18 years of age with a body mass index (BMI) >40 kg m(-2) or BMI > 35 kg m(-2) with ≥1 comorbidity. The sample included 105 participants, 73.3% female, with a mean BMI of 46.6 ± 7.1 kg m(-2) . Only 33.3% of participants were interested in surgery; 50.5% of participants were not interested and 16.2% had mixed feelings. Participants identified risks (69.5%) and side effects (57.1%) as significant surgical barriers. Interested participants were more likely to perceive themselves as obese, were unhappy with their current weight loss method and were less likely to fear surgery (P < 0.05). The prevalence of comorbidities was not different by surgical interest (P = 0.17). Despite the effectiveness of bariatric surgery, the majority of qualified patients are not interested in surgery mainly due to the perceived risk of surgery in general and satisfaction with current non-surgical weight loss efforts. The self-perception of obesity, as opposed to medical comorbidities, may be a stronger driver of the decision to have bariatric surgery. It is unclear if patients are aware of the effectiveness of bariatric surgery to help improve comorbidities or if bariatric surgery is perceived as being more cosmetic in nature.

The Impact of Protein Nutritional Supplementation for Massive Weight Loss Patients Undergoing Abdominoplasty

BACKGROUND

As more patients undergo bariatric surgery to assist with weight loss, the demand for post-bariatric body contouring surgery, to address both functional and aesthetic concerns, is increasing. However, high wound healing complication rates remain a significant problem for these patients. One theory is that chronic malnourishment and hypoproteinemia may contribute significantly to these wound healing complications.

OBJECTIVE

The purpose of this study was to determine the effect of pretreatment protein nutritional supplementation on wound healing in post-bariatric surgery massive weight loss patients undergoing abdominoplasty. Our hypothesis was that protein supplementation would decrease wound healing complications.

METHODS

A retrospective review was performed of 23 post-bariatric surgery patients undergoing abdominoplasty who received pretreatment protein nutritional supplementation. This group was compared with a historical control group of 23 post-bariatric surgery patients who underwent abdominoplasty in the period immediately before the implementation of the protein supplementation protocol. Patient demographics and procedural characteristics were similar for the two groups.

RESULTS

Forty-six patients were identified who had undergone abdominoplasty, half of whom were prescribed the protein supplementation protocol. Overall wound healing complication rates were significantly lower in the protein-supplemented group (0.0% vs. 21.8%, p = 0.04). There was no significant difference between the protein supplementation and historical control groups in regards to total complication rate.

CONCLUSIONS

Pretreatment protein supplementation is a simple intervention that can significantly decrease wound healing complications in post-bariatric surgery massive weight loss patients undergoing abdominoplasty. LEVEL OF EVIDENCE 4: Therapeutic.

Weight-based bullying and compromised peer relationships in young adult bariatric patients

The experience of weight-based bullying in young adult bariatric patients has not yet been examined. Thirteen young adults (age, 18-24) that were seeking or had undergone bariatric surgery participated in semi-structured in-depth interviews. A thematic analysis informed by grounded theory principles was conducted. Analysis revealed the following three major themes: (1) being the biggest kid, (2) coping through avoidance, and (3) compromised peer and intimate relationships. Victims of weight-based bullying often avoid and withdraw socially in response to persistent verbal abuse. The decision to pursue bariatric surgery at a relatively young age adds another dimension of difficulty when navigating peer relationships.

Inequity to the utilization of bariatric surgery: a systematic review and meta-analysis

This systematic review explores the sociodemographic factors associated with the utilization of bariatric surgery among eligible patients. Electronic databases were searched for population-based studies that explored the relationship between sociodemographic characteristics of patients eligible for bariatric surgery to those who actually received the procedure. Twelve retrospective cohort studies were retrieved, of which the results of 9 studies were pooled using a random effects model. Patients who received bariatric surgery were significantly more likely to be white versus non-white (OR 1.54; 95% CI 1.08, 2.19), female versus male (OR 2.80; 95% CI 2.46, 3.22), and have private versus government or public insurance (OR 2.51; 95% CI 1.04, 6.05). Prospective cohort studies are warranted to further determine the relative effect of these factors, adjusting for confounding factors.

A population-based analysis of use and outcomes of laparoscopic bariatric surgery across socioeconomic groups in Taiwan

BACKGROUND

With the growing development of minimally invasive techniques for the treatment of morbid obesity, laparoscopic bariatric surgery (LBS) is increasingly performed. This study aimed to assess the association between patients' socioeconomic status (SES) and the likelihood of undergoing LBS and related outcomes in Taiwan.

METHODS

This nationwide population-based study was conducted by using data from Taiwan's National Health Insurance Research Database. A total of 3678 morbidly obese patients aged 18 years and older who underwent conventional open bariatric surgery or LBS were identified between 2004 and 2011. Regression analyses were performed using generalized estimating equation (GEE) models to account for the nesting of patients within physician to assess patients' SES category associated with the use of LBS and related outcomes. Odds ratios (ORs) and 95 % confidence intervals (CIs) were estimated.

RESULTS

Compared with those with medium and low SES (84.6 % and 80.2 %), patients with high SES (88.1 %) had the highest percentage of undergoing LBS (P < 0.001). After adjusting for patient demographics, institution and surgeon characteristics, the multivariate GEE analysis revealed that the highest likelihood of undergoing LBS was noted in morbidly obese patients with high SES (OR = 1.45, 95 % CI 1.10-1.90), followed by those with medium SES (OR = 1.27, 95 % CI 1.04-1.56). In addition, patients with high SES had slightly lower length of hospital stay (LOS; OR = 0.90, 95 % CI 0.82-0.99) and hospital treatment cost (OR = 0.93, 95 % CI 0.87-0.99) than their counterparts after adjustment.

CONCLUSIONS

The increased likelihood of undergoing LBS and lower LOS and hospital treatment cost were noted among morbidly obese patients with higher SES. This finding suggests there is the need to improve clinical practice and reduce health disparities in the surgical treatment of morbidly obese patients.

Current Perspectives on Long-term Obesity Pharmacotherapy

Approximately 1 in 4 adult Canadians are obese and, thus, are at an elevated risk for developing type 2 diabetes, cardiovascular disease and other conditions. Current treatment guidelines recommend that obese individuals lose 5% to 10% of their starting weights to minimize the risk factors for cardiovascular disease and reduce the risk for developing type 2 diabetes or hypertension. All obesity-management strategies involve lifestyle management, but few patients will lose a significant amount of weight and manage to keep it off over the long term using just this strategy. Bariatric surgery is associated with significant long-term weight loss but is restricted to subjects with very high body mass indices, who often wait many years to undergo the procedure. Recent breakthroughs in understanding the mechanisms underlying the development and maintenance of elevated body fat have led to the arrival of new obesity pharmacotherapies. These novel antiobesity therapies, which work by reducing energy intake or through increasing satiety, decreasing hunger, or reducing absorption of calories, may be used indefinitely once patients have demonstrated significant responses (usually defined as ≥5% weight loss) over the first 12 weeks of treatment. To date, 2 long-term obesity pharmacotherapies have been approved and are available in Canada: liraglutide and orlistat. Here, I summarize the mechanisms and clinical features of medications for long-term obesity management that are available in Canada, as well as those available in other jurisdictions or are currently in development.

Long-Term Outcomes of Obesity Surgery and Implications for Health System Planning

Weight loss surgery is currently the only treatment that offers significant and sustained weight loss for those with severe and complex obesity. Obesity levels have reached a sustained high, whereby several percent of a country's population would qualify for surgery based upon current national guidelines. Worldwide, the provision of surgery is highly variable and to treat all the affected population, it would require at least a 100-fold increase in the provision of services. This has important cost and commissioning implications for health-care planners. Reliable level 1 evidence of the long-term effects of obesity surgery is still lacking, and the long-term complication profiles and re-operation rates unclear, which could have significant impact on health-care systems in the future. The chronic disease management of obesity in a population must be integrated with education and prevention and the brief intervention of weight loss surgery and the management of its sequelae, to prevent significant future morbidity and mortality.

Is it time to lower the bar for bariatric surgery?

A new position statement from the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO) recommends that surgery be also considered for patients with class 1 obesity (BMI 30-35 kg/m(2)) with significant comorbidity, who have failed nonsurgical obesity treatments. These recommendations reflect the arbitrary nature of current BMI-based recommendations. However, it is essential that this new approach be carefully assessed with regard to outcomes, cost-effectiveness, and impact on access to care for those with more severe obesity.

Gap Between Evidence and Patient Access: Policy Implications for Bariatric and Metabolic Surgery in the Treatment of Obesity and its Complications

Despite consistently supportive evidence of clinical effectiveness and economic advantages compared with currently available non-surgical obesity treatments, patient access to bariatric and metabolic surgery (BMS) is impeded. To address this gap and better understand the relationship between value and access, the objectives of this study were twofold: (i) identify the multidimensional barriers to adoption of BMS created by clinical guidelines, public policies, and health technology assessments; and, most importantly, (ii) develop recommendations for stakeholders to improve patient access to BMS. Updated public policies focused on treatment and clinical guidelines that reflect the demonstrated advantages of BMS, patient education on safety and effectiveness, updated reimbursement policies, and additional data on long-term BMS effectiveness are needed to improve patient access.

Smoking is associated with more abdominal fat in morbidly obese patients

INTRODUCTION

While the association between cigarette smoking and abdominal fat has been well studied in normal and overweight patients, data regarding the influence of tobacco use in patients with morbid obesity remain scarce. The aim of this study is to evaluate body fat distribution in morbidly obese smokers.

METHODS

We employed a cross-sectional study and grouped severely obese patients (body mass index [BMI] >40 kg/m2 or >35 kg/m2 with comorbidities) according to their smoking habits (smokers or non-smokers). We next compared the anthropometrical measurements and body composition data (measured by electric bioimpedance) of both groups. We analyzed the effect of smoking on body composition variables using univariate and multiple linear regression (MLR); differences are presented as regression coefficients (b) and their respective 95% confidence intervals.

RESULTS

We included 536 morbidly obese individuals, 453 (84.5%) non-smokers and 83 (15.5%) smokers. Male smokers had a higher BMI (b=3.28 kg/m2, p=0.036), larger waist circumference (b=6.07 cm, p=0.041) and higher percentage of body fat (b=2.33%, p=0.050) than non-smokers. These differences remained significant even after controlling for confounding factors. For females, the only significant finding in MLR was a greater muscle mass among smokers (b=1.34kg, p=0.028). No associations were found between tobacco load measured in pack-years and anthropometric measures or body composition.

DISCUSSION

Positive associations between smoking and BMI, and waist circumference and percentage of body fat, were found among male morbidly obese patients, but not among females. To the best of our knowledge, this study is the first investigation of these aspects in morbidly obese subjects. We speculate that our findings may indicate that the coexistence of morbid obesity and smoking helps to explain the more serious medical conditions, particularly cardiovascular diseases and neoplasms, seen in these patients.

Rapid Reduction in Use of Antidiabetic Medication after Laparoscopic Sleeve Gastrectomy: The Newfoundland and Labrador Bariatric Surgery Cohort (BaSCo) Study

BACKGROUND

Patients who have undergone bariatric surgery generally need fewer medications as they experience improvement in, or even resolution of, various medical conditions, including type 2 diabetes mellitus, hypertension, and dyslipidemia. Published data on changes in medication use after laparoscopic sleeve gastrectomy, a type of bariatric surgery that is growing in popularity, are limited.

OBJECTIVE

To determine whether patients took fewer medications for management of type 2 diabetes, hypertension, and dyslipidemia after laparoscopic sleeve gastrectomy, relative to preprocedure medications.

METHODS

In this prospective, single-centre cohort study, a nurse practitioner used standard medication reconciliation and study data-extraction forms to interview adult patients who had undergone laparoscopic sleeve gastrectomy and determine their medication use and pertinent demographic data. The data were analyzed using generalized estimating equations and standard statistical software. Outcome measures included changes in the use of antidiabetic, antihypertensive, and antilipemic medications at 1, 3, and 6 months after the surgery.

RESULTS

A total of 65 patients who underwent laparoscopic sleeve gastrectomy between May 2011 and January 2014 met the study inclusion criteria. Before surgery, the 30 patients with type 2 diabetes were taking an average of 1.9 antidiabetic medications. One month after the procedure, 15 (50%) had discontinued all antidiabetic medications, with a further decline at 3 and 6 months (p < 0.001 at each time point). Among the patients who were taking antihypertensives (n = 48) and antilipemics (n = 33) before surgery, the decline in use occurred at a more modest rate, with 6 (12%) and 2 (6%), respectively, discontinuing these medication classes within 1 month, and 12 (25%) (p = 0.001) and 8 (24%) (p = 0.015) having discontinued by 6 months.

CONCLUSIONS

These findings suggest that patients with a history of type 2 diabetes mellitus, hypertension, and/or dyslipidemia who undergo laparoscopic sleeve gastrectomy are less likely to require disease-specific medications shortly after surgery.

Cause of death in patients awaiting bariatric surgery

BACKGROUND

Obesity is associated with increased mortality. Bariatric surgery is becoming an important treatment modality for obesity, with an associated reduction in mortality. There are few data available on the incidence and cause of death in referred patients while they are waiting for bariatric surgery.

METHODS

We retrospectively examined all cases of death in patients who were referred for bariatric surgery assessment but who had not yet undergone bariatric surgery at a tertiary care centre in Halifax, Nova Scotia. The wait list comprised patients referred for surgery between March 2008 and May 2013. All cases of death were reviewed to determine age, sex, time of referral, time spent on the wait list, cause of death, comorbidities and body mass index (BMI).

RESULTS

Of the 1399 patients referred, 22 (1.57%) died before receiving surgery. The mean age of these patients was 62.7 (range of 32-70) years. The average time from referral to death was 21.6 months, and the average BMI was 51.5. The most frequent cause of death was cancer, followed by cardiac and infectious causes.

CONCLUSION

This study provides useful information about mortality and causes of death among patients awaiting bariatric surgery at our centre. Our results will help guide the development of a judicious system for triage in light of long wait times.

Quantitative analysis of bariatric procedure trends 2001–13 in South Australia: implications for equity in access and public healthcare expenditure

Objectives The aims of the present study were to: (1) identify trends in bariatric surgery in South Australia (SA) from 2001 to 2013; and (2) compare public and private hospitals, and so discuss the implications of these trends as they relate to equity in access to bariatric procedures and public system healthcare expenditure. Methods An analysis of retrospective data of all bariatric procedures in public and private hospitals in SA was conducted using all SA public and private hospital administrative records between 2001 and 2013. Results Of all procedures conducted in SA, 22.6% were revisions or reversals. The number of revisions or reversals conducted in SA has increased at a rate higher than weight loss procedures (6.4- vs 3.8-fold increase). An increasing proportion of public surgeries are revisions or reversals of weight loss procedures that occurred outside of the SA public system (interstate or in the private system). Conclusion Further investigation is necessary to identify the pathways patients navigate to access bariatric surgery, the utilisation of public services following private procedures and why rates of revisions or reversals of bariatric procedures are increasing in SA. What is known about the topic? Rates of bariatric surgery are increasing internationally as a treatment for obesity. What does this paper add? Trends in bariatric procedures in SA have not been published. We have identified that: (1) rates of bariatric revisions or reversals in SA far surpass the rate at which bariatric weight loss procedures are increasing; (2) rates of revisions or reversals are increasing in public hospitals; and (3) an increasing number of the revision or reversal procedures in public hospitals are for weight loss procedures that have occurred outside the public system. What are the implications for practitioners? The data have implications for practitioners caring for patients interested in undergoing bariatric surgery for the treatment of obesity. The data suggest that rates of revisions or reversals are increasing in public hospitals, which suggests that further information is needed regarding the effectiveness of weight loss procedures and the implications of revision or reversal increases on waiting times for patients seeking weight loss treatment in a system with limited resources.

Analysis of patient attrition in a publicly funded bariatric surgery program

BACKGROUND

Obesity is a global epidemic, and several surgical programs have been created to combat this public health issue. Although demand for bariatric surgery has grown, so too has the attrition rate. In this study we identify patient characteristics and operational interventions that have contributed to high attrition in a multistage, multidisciplinary bariatric surgery program.

STUDY DESIGN

A retrospective study was conducted of 1,682 patients referred for bariatric surgery at the University Health Network in Toronto, Canada, from June 2008 to July 2011. Demographic information, presurgical assessment dates, and records describing operational changes were collected. Several penalized likelihood and mixed effects multivariable logistic regression models were used to determine whether patient characteristics, operational changes, and previous experience affected program completion and intermediate transitions between assessments.

RESULTS

Although the majority of attrition appears to be the result of patient self-removal, males (odds ratio [OR] 0.511, 95% CI 0.392 to 0.663, p < 0.001), and individuals with active substance use (OR 0.223, 95% CI 0.096 to 0.471, p < 0.001) were less likely to undergo surgery. Operational practices had a detrimental effect on program completion (OR 0.590, 95% CI 0.456 to 0.762, p < 0.001). Conversely, patients with a BMI > 40 kg/m(2) (OR 1.756, 95% CI 1.233 to 2.515, p = 0.002) and those who lived within 25 to 300 km of the center (OR > 1.633, p < 0.001) were more likely to undergo surgery.

CONCLUSIONS

Certain subgroups in the referral population were found to be at a higher risk of noncompletion. Specialized care pathways must be implemented to address this issue. Furthermore, careful consideration must be given to operational decisions because they may negatively affect access to care, as we have shown.

Weight loss expectations of laparoscopic sleeve gastrectomy candidates compared to clinically expected weight loss outcomes 1-year post-surgery

BACKGROUND

Laparoscopic sleeve gastrectomy (LSG) results in significant, sustainable weight loss in obese individuals (body mass index (BMI) ≥ 40 kg/m(2) or BMI 35.0-39.9 kg/m(2) with major comorbidity). Average clinically expected % excess weight loss (%EWL) has been reported to be 56.1 % 1 year after LSG. Unrealistic weight loss expectations are purported to negatively impact treatment adherence and weight loss outcomes. This study examined the weight loss expectations of LSG candidates in Newfoundland and Labrador, Canada.

METHODS

The Goals and Relative Weights Questionnaire was administered before the start of a bariatric surgery education session to 84 consecutive LSG candidates. Patients reported postoperative weight loss expectations in four categories: "dream", "happy", "acceptable", and "disappointed".

RESULTS

Participants included 69 women and 15 men with an average age and weight of 43.7 years and 136.7 kg. The patients reported average postoperative "dream" and "happy" weights as 71.1 and 80.0 kg, respectively. Patients reported a weight of 86.2 kg as "acceptable" but would be "disappointed" with a weight of 105.6 kg. To achieve the desired amount of weight loss for each category, patients would have to achieve %EWLs of 88.7, 76.4, 68.2, and 40.6 %, respectively.

CONCLUSIONS

Patients have higher weight loss expectations than those that are clinically expected within 1 year after LSG.

Body image concerns in obese women seeking bariatric surgery

Purpose

– The purpose of this paper is to assess multidimensional body image concerns in a sample of obese women seeking bariatric surgery at an outpatient hospital clinic in Hamilton, Ontario, Canada.

Design/methodology/approach

– A sample of obese adult women seeking bariatric surgery at an outpatient medical clinic in Hamilton, Ontario, Canada (n=148) completed various self-report measures of body image concerns, including body image dysphoria, body image quality of life, body image investment, and appearance satisfaction. Participant scores were compared to normative data. Correlations between body image concern measures and body mass index (BMI) were examined.

Findings

– Participants endorsed more body image dysphoria, more negative body image quality of life, and less appearance satisfaction than normative samples. BMI was not correlated with body image concern scores.

Practical implications

– Interventions aimed at reducing body image disturbance in obese women should target multiple components of body image concern. Decisions about who should receive interventions should not be based on BMI status.

Originality/value

– The majority of research on body image concerns focuses exclusively on evaluative constructs such as body image dissatisfaction. The current study examined affective, cognitive, and behavioural body image constructs. A better understanding of the multidimensional nature of body image concerns in obese women seeking bariatric surgery informs the development of effective, targeted interventions.

Dionne M, E. Cassin S, Wnuk S, Taube-Schiff M, Sockalingam S. Psychopathology in severely obese women from a Canadian bariatric setting

Purpose

– Evidence suggests high rates of psychiatric disorders in bariatric surgery candidates (e.g. Mitchell et al., 2012), although no rigorous studies have examined the prevalence in a Canadian sample. Improved understanding of the prevalence of psychopathology among female patients is an important area of study, as females comprise approximately 80 percent of surgical candidates (Martin et al., 2010; Padwal, 2005). The purpose of this paper is to assess the prevalence of Axis I disorders and associations with quality of life in a Canadian sample of female bariatric surgery candidates.

Design/methodology/approach

– Female patients (n=257) were assessed using a structured psychodiagnostic interview and completed a health-related quality of life questionnaire.

Findings

– Results indicated that 57.2 percent of patients met DSM-IV-TR criteria for a lifetime psychiatric disorder and 18.3 percent met criteria for a current psychiatric disorder. Major depressive disorder was the most common lifetime psychiatric disorder (35.0 percent) and binge eating disorder was the most prevalent current psychiatric disorder (6.6 percent). Patients scored significantly lower than Canadian population norms on all domains of the SF-36 (all p's<0.001). Patients with a current Axis I disorder also reported significantly worse functioning on four mental health domains and one physical health domain (p's<0.01) compared to patients without a current Axis I disorder.

Originality/value

– Results confirm high rates of psychiatric disorders in Canadian female bariatric surgery candidates and provide evidence for associated functional health impairment. Further study is needed to elucidate how pre-operative psychopathology may impact female patients’ post-operative outcomes.

Health inequity in access to bariatric surgery: a protocol for a systematic review

BACKGROUND

Bariatric surgery is the only weight-loss treatment available that results in both sustained weight loss and improvements of obesity-related comorbidities. Individuals who meet the eligibility criteria for bariatric surgery are generally older, come from racial or ethnic minorities, are economically disadvantaged, and have low levels of education. However, the population who actually receives bariatric surgery does not reflect the individuals who need it the most. The objective is to conduct a systematic review of the literature exploring the inequities to the access of bariatric surgery.

METHODS/DESIGN

EMBASE and Medline databases will be searched for observational studies that compared at least one of the PROGRESS-PLUS sociodemographic characteristics of patients eligible for bariatric surgery to those who actually received the procedure. Articles published in the year 1980 to present with no language restrictions will be included. For inclusion, studies must only include adults (≥18 years old) who meet National Institutes of Health (NIH) eligibility criteria for bariatric surgery defined as having either (1) a body mass index (BMI) of 40 kg/m² or greater; or (2) BMI of 35 kg/m² or greater with significant weight-related comorbidities. Eligible interventions will include malabsorptive, restrictive, and mixed bariatric procedures.

DISCUSSION

There appears to be inequities in access to bariatric surgery. In order to resolve the health inequity in the treatment of obesity, a synthesis of the literature is needed to explore and identify barriers to accessing bariatric surgery. It is anticipated that the results from this systematic review will have important implications for advancing solutions to minimize inequities in the utilization of bariatric surgery. http://www.crd.york.ac.uk/PROSPERO/display_record.asp?ID=CRD42013004920.

Current and predicted prevalence of obesity in Canada: a trend analysis

BACKGROUND

The prevalence of obesity has increased over the past 3 decades, with a disproportionate growth in excessive weight categories (body mass index [BMI] 35.0-39.9 and BMI ≥ 40.0). The objective of this paper is to present the data for the past and current prevalence of adult obesity in Canada, together with future estimates.

METHODS

We calculated BMIs for adults aged 18 years and older who were not in long-term care using data from Canadian health surveys administered between 1985 and 2011. Calculation of the BMIs was based on self-reported heights and weights. The weight categories were as follows: normal (BMI 18.5-24.9), overweight (25.0-29.9), obese class I (30.0-34.9), obese class II (35.0-39.9) and obese class III (≥ 40.0). Outcome measures were prevalence of adult obesity according to BMI categories, nationally and provincially. We used regression analysis models to predict future prevalence of adult obesity up to 2019.

RESULTS

Between 1985 and 2011, the prevalence of adult obesity in Canada increased from 6.1% to 18.3%. Furthermore, since 1985, the prevalence of obesity in classes I, II and III increased from 5.1% to 13.1%, from 0.8% to 3.6%, and from 0.3% to 1.6%, respectively. Taking into account regional variations, we predict that, by 2019, the prevalence of obesity in classes I, II and III will increase to 14.8%, 4.4% and 2.0%, respectively, and that half of the Canadian provinces will have more overweight or obese adults than normal-weight adults.

INTERPRETATION

We found significant increases in the excessive weight categories of obesity, with continued increases predicted for all provinces up to 2019. Provincial variations in obesity prevalence were also significant. To address these projected increases and any subsequent burden on the health care system, a concerted effort must be made by the provinces to focus on the prevention, management and treatment of obesity in Canada.

Patients' perceptions of waiting for bariatric surgery: a qualitative study

BACKGROUND

In Canada waiting lists for bariatric surgery are common, with wait times on average > 5 years. The meaning of waiting for bariatric surgery from the patients' perspective must be understood if health care providers are to act as facilitators in promoting satisfaction with care and quality care outcomes. The aims of this study were to explore patients' perceptions of waiting for bariatric surgery, the meaning and experience of waiting, the psychosocial and behavioral impact of waiting for treatment and identify health care provider and health system supportive measures that could potentially improve the waiting experience.

METHODS

Twenty-one women and six men engaged in in-depth interviews that were digitally recorded, transcribed verbatim and analysed using a grounded theory approach to data collection and analysis between June 2011 and April 2012. The data were subjected to re-analysis to identify perceived health care provider and health system barriers to accessing bariatric surgery.

RESULTS

Thematic analysis identified inequity as a barrier to accessing bariatric surgery. Three areas of perceived inequity were identified from participants' accounts: socioeconomic inequity, regional inequity, and inequity related to waitlist prioritization. Although excited about their acceptance as candidates for surgery, the waiting period was described as stressful, anxiety provoking, and frustrating. Anger was expressed towards the health care system for the long waiting times. Participants identified the importance of health care provider and health system supports during the waiting period. Recommendations on how to improve the waiting experience included periodic updates from the surgeon's office about their position on the wait list; a counselor who specializes in helping people going through this surgery, dietitian support and further information on what to expect after surgery, among others.

CONCLUSION

Patients' perceptions of accessing and waiting for bariatric surgery are shaped by perceived and experienced socioeconomic, regional, and waitlist prioritization inequities. A system addressing these inequities must be developed. Waiting for surgery is inherent in publicly funded health care systems; however, ensuring equitable access to treatment should be a health system priority. Supports and resources are required to ensure the waiting experience is as positive as possible.

Mineral malnutrition following bariatric surgery

Moderate/severe obesity is on the rise in the United States. Weight management includes bariatric surgery, which is effective and can alleviate morbidity and mortality from obesity-associated diseases. However, many individuals are dealing with nutritional complications. Risk factors include: 1) preoperative malnutrition (e.g., vitamin D, iron); 2) decreased food intake (due to reduced hunger and increased satiety, food intolerances, frequent vomiting); 3) inadequate nutrient supplementation (due to poor compliance with multivitamin/multimineral regimen, insufficient amounts of vitamins and/or minerals in supplements); 4) nutrient malabsorption; and 5) inadequate nutritional support (due to lack of follow-up, insufficient monitoring, difficulty in recognizing symptoms of deficiency). For some nutrients (e.g., protein, vitamin B-12, vitamin D), malnutrition issues are reasonably addressed through patient education, routine monitoring, and effective treatment strategies. However, there is little attention paid to other nutrients (e.g., zinc, copper), which if left untreated may have devastating consequences (e.g., hair loss, poor immunity, anemia, defects in neuro-muscular function). This review focuses on malnutrition in essential minerals, including calcium (and vitamin D), iron, zinc, and copper, which commonly occur following popular bariatric procedures. There will be emphasis on the complexities, including confounding factors, related to screening, recognition of symptoms, and, when available, current recommendations for treatment. There is an exceptionally high risk of malnutrition in adolescents and pregnant women and their fetuses, who may be vulnerable to problems in growth and development. More research is required to inform evidence-based recommendations for improving nutritional status following bariatric surgery and optimizing weight loss, metabolic, and nutritional outcomes.

The evaluating self-management and educational support in severely obese patients awaiting multidisciplinary bariatric care (EVOLUTION) trial: rationale and design

BACKGROUND

In Canada, demand for multidisciplinary bariatric (obesity) care far outstrips capacity. Consequently, prolonged wait times exist and contribute to substantial health impairments.A supportive, educational intervention (with in-person and web-based versions) designed to enhance the self-management skills of patients wait-listed for multidisciplinary bariatric medical and surgical care has been variably implemented across Alberta, Canada. However, its effectiveness has not been evaluated. Our objectives were: 1. To determine if this program improves clinical and humanistic outcomes and is cost-effective compared to a control intervention; and 2. To compare the effectiveness and cost-effectiveness of in-person group-based versus web-based care. We hypothesize that both the web-based and in-person programs will reduce body weight and improve outcomes compared to the control group. Furthermore, we hypothesize that the in-person version will be more effective but more costly than the web-based version.

METHODS/DESIGN

This pragmatic, prospective controlled trial will enrol 660 wait-listed subjects (220 per study arm) from regional bariatric programs in Alberta and randomly assign them to: 1. an in-person, group-based intervention (9 modules delivered over 10 sessions); 2. a web-based intervention (13 modules); and 3. controls who will receive mailed literature. Subjects will have three months to review the content assigned to them (the intervention period) after which they will immediately enter the weight management clinic. Data will be collected at baseline and every 3 months for 9 months (study end), including: 1. Clinical [5% weight loss responders (primary outcome), absolute and % weight losses, changes in obesity-related comorbidities]; 2. Humanistic (health related quality of life, patient satisfaction, depression, and self-efficacy); and 3. Economic (incremental costs and utilities and cost per change in BMI assessed from the third party health care payor perspective) outcomes. Covariate-adjusted baseline-to-nine-month change-scores will be compared between groups for each outcome using linear regression for continuous outcomes and logistic regression for dichotomous ones.

DISCUSSION

Our findings will determine whether this intervention is effective and cost-effective compared to controls and if online or in-person care delivery is preferred. This information will be useful for clinicians, health-service providers and policy makers and should be generalizable to similar publically-funded bariatric care programs.

TRIAL REGISTRATION

Trial Identifier: NCT01860131.