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Background and aim: Examine the effect of a professionally-guided telephone peer support intervention on recovery outcomes including depression, perceived social support, and health services utilization after coronary artery bypass graft surgery (CABG). Methods: A randomized controlled trial was conducted with post-coronary artery bypass graft surgery men (N=185) who were randomized before hospital discharge. The intervention arm received telephone-based peer support through weekly telephone calls from a peer volunteer over six weeks, initiated within 3–4 days of discharge. Results: Although a significant difference was detected in pre-intervention depression scores at discharge, there were no differences between groups in changes in depression scores at six weeks (p=0.08), 12 weeks (0.49) or over time (p=0.51); and no significant differences in perceived social support scores over time (p=0.94). At 12 weeks, the intervention group had significantly lower incidence of health services utilization (family physician (p=0.02) and emergency room (p=0.04)). Conclusions: Healthcare providers need to continue to investigate novel interventions to enhance social support and reduce depression in cardiac patients. [ABSTRACT FROM AUTHOR]

Vitamin B6 is important in fetal development, but little is known of the vitamin B6 status of pregnant women and newborns in North America and potential modifying factors. This prospective study determined maternal and cord plasma concentrations of pyridoxal 5′ phosphate (PLP; an indicator of vitamin B6 status) in a convenience sample of 368 Canadian pregnant women and their newborns. The association of maternal intake of vitamin B6 and fetal genetic variants with cord plasma PLP and homocysteine concentrations was also examined. Dietary and supplemental intakes of vitamin B6 were assessed in early and mid to late pregnancy. PLP concentrations were measured in maternal plasma in early pregnancy and at delivery, and in cord plasma. Six fetal variants of the MTHFR and CβS genes were assessed for their association with cord plasma PLP and homocysteine concentrations. Geometric mean (95% CI) PLP concentrations were 107 (98, 116) nmol/L in early pregnancy and 58 (53, 62) nmol/L at delivery, respectively, and 296 (275, 319) nmol/L in cord blood ( p < .0001). During early pregnancy and at delivery, 3.6% and 5.5% of women had plasma PLP concentrations <20 nmol/L, respectively. Ninety eight percent of the women with supplemental B6 intake of at least the recommended dietary allowance had PLP concentrations >20 nmol/L. Fetal genetic variants were not associated with cord PLP and homocysteine concentrations. Vitamin B6 deficiency is uncommon in a cohort of Canadian pregnant women due largely to prevalent vitamin B6 supplement use. [ABSTRACT FROM AUTHOR]

Background: More than 30 genes can harbor rare exonic variants sufficient to cause nephrotic syndrome (NS), and the number of genes implicated in monogenic NS continues to grow. However, outside the first year of life, the majority of affected patients, particularly in ancestrally mixed populations, do not have a known monogenic form of NS. Even in those children classified with a monogenic form of NS, there is phenotypic heterogeneity. Thus, we have only discovered a fraction of the heritability of NS-the underlying genetic factors contributing to phenotypic variation. Part of the 'missing heritability' for NS has been posited to be explained by patients harboring coding variants across one or more previously implicated NS genes, insufficient to cause NS in a classical Mendelian manner, but that nonetheless have a sufficient impact on protein function to cause disease. However, systematic evaluation in patients with NS for rare or low-frequency risk alleles within single genes, or in combination across genes ('oligogenicity'), has not been reported. To determine whether, compared with a reference population, patients with NS have either a significantly increased burden of protein-altering variants ('risk-alleles'), or a unique combination of them ('oligogenicity'), in a set of 21 genes implicated in Mendelian forms of NS. Methods: In 303 patients with NS enrolled in the Nephrotic Syndrome Study Network (NEPTUNE), we performed targeted amplification paired with next-generation sequencing of 21 genes implicated in monogenic NS. We created a high-quality variant call set and compared it with a variant call set of the same genes in a reference population composed of 2,535 individuals from phase 3 of the 1000 Genomes Project. We created both a 'stringent' and a 'relaxed' pathogenicity-filtering pipeline, applied them to both cohorts, and computed the burden of variants in the entire gene set per cohort, the burden of variants in the entire gene set per individual, the burden of variants within a single gene per cohort, and unique combinations of variants across two or more genes per cohort. Results: With few exceptions when using the relaxed filter, and which are likely the result of confounding by population stratification, NS patients did not have a significantly increased burden of variants in Mendelian NS genes in comparison to a reference cohort, nor was there any evidence for oligogenicity. This was true when using both the relaxed and the stringent variant pathogenicity filter. Conclusion: In our study, there were no significant differences in the burden or particular combinations of low-frequency or rare protein-altering variants in a previously implicated Mendelian NS genes cohort between North American patients with NS and a reference population. Studies in larger independent cohorts or meta-analyses are needed to assess the generalizability of our discoveries and also address whether there is in fact small but significant enrichment of risk alleles or oligogenicity in NS cases that was undetectable with this current sample size. It is still possible that rare protein-altering variants in these genes, insufficient to cause Mendelian disease, still contribute to NS as risk alleles and/or via oligogenicity. However, we suggest that more accurate bioinformatic analyses and the incorporation of functional assays would be necessary to identify bona fide instances of this form of genetic architecture as a contributor to the heritability of NS. [ABSTRACT FROM AUTHOR]

Objective: To investigate the prevalence of occipital bending (an occipital lobe crossing or twisting across the midline) in subjects with schizophrenia and matched healthy controls. Method: Occipital bending prevalence was investigated in 37 patients with schizophrenia and 44 healthy controls. Results: Ratings showed that prevalence was nearly three times higher among schizophrenia patients (13/37 [35.1%]) than in control subjects (6/44 [13.6%]). Furthermore, those with schizophrenia had greater normalized gray matter volume but less white matter volume and had larger brain-to-cranial ratio. Conclusion: The results suggest that occipital bending is more prevalent among schizophrenia patients than healthy subjects and that schizophrenia patients have different gray matter-white matter proportions. Although the cause and clinical ramifications of occipital bending are unclear, the results infer that occipital bending may be a marker of psychiatric illness. [ABSTRACT FROM AUTHOR]

Background: Dietary pattern analysis represents a departure from the traditional focus on single foods and nutrients and provides a comprehensive understanding of the role of the diet in chronic disease prevention and etiology. Dietary patterns of Canadians have not been evaluated comprehensively with the use of an updated a priori dietary quality index. Objectives: We aimed to update the Dietary Guidelines for Americans Adherence Index (DGAI) on the basis of the 2015 Dietary Guidelines for Americans (DGA), to evaluate the construct validity and reliability of the revised index, and to examine whether closer adherence to this index is associated with a lower risk of obesity with or without an accompanying chronic disease. Design: Data from 11,748 participants (≥18 y of age) in the crosssectional Canadian Community Health Survey cycle 2.2 were used in weighted multivariate analyses. Multinomial logistic regression was used to test the association between diet quality and obesity risk. Results: With the use of principal component analyses, the multidimensionality of the 2015 DGAI was confirmed, and its reliability was shown with a high Cronbach's α = 0.75. Moving from the first to the fourth (healthiest) quartile of the 2015 DGAI score, there was a trend toward decreased energy (2492 ± 26 compared with 2403 ± 22 kcal, respectively; ±SE) and nutrients of concern (e.g., sodium), whereas intakes of beneficial nutrients increased (P-trend < 0.05). In the age- and sex-adjusted model, a lack of adherence to the 2015 DGA recommendations increased the OR of being unhealthy obese from 1.42 (95% CI: 1.02, 1.99) in quartile 3 to 2.08 (95% CI: 1.49, 2.90) in quartile 2 to 2.31 (95% CI: 1.65, 3.23) in the first quartile of the 2015 DGAI score, compared with the fourth quartile (healthiest) (P-trend < 0.0001). The odds of being obese without a chronic disease (healthy obese) and having a chronic disease without being obese also increased in the lowest DGAI quartile compared with the highest DGAI quartile, albeit not as much as in the unhealthy obese group. Conclusion: The 2015 DGAI provides a valid and reliable measure of diet quality among Canadians. [ABSTRACT FROM AUTHOR]

Purpose: The primary endpoint was to determine the plasma concentration of alpha-linolenic acid (ALA), and its metabolites, following milled flaxseed consumption at four doses. Secondary outcomes focused on plasma enterolignan concentrations and the effects on tolerability, platelet aggregation, plasma lipids and urinary thromboxane levels. Methods: Healthy, younger adults ( n = 34; 18-49 years old) were randomized into four groups consuming one muffin daily for 30 days fortified with 10, 20, 30 or 40 g of milled flaxseed. Blood and urine were collected at baseline and 4 weeks. Results: Plasma ALA concentrations increased with all flaxseed doses ( P < 0.01), except the 20 g/day dose ( P = 0.10), yet there was no significant dose-dependent response ( P = 0.81). Only with the 30 g/day diet were n-3 polyunsaturated fatty acids ( P = 0.007), and eicosapentaenoic acid (EPA) ( P = 0.047) increased from baseline values. Docosapentaenoic acid and docosahexaenoic acid were not detected at any dose. Plasma total enterolignan concentrations significantly increased over time in all treatment groups, yet despite a dose-dependent tendency, no between-group differences were detected ( P = 0.22). Flaxseed was well tolerated, even at the highest dose, as there were no reported adverse events, changes in cholesterol, platelet aggregation or urinary 11-dehydro-thromboxane B. Conclusions: In healthy, younger adults, 10 g/day of milled flaxseed consumption is sufficient to significantly increase circulating ALA and total enterolignan concentrations; however, 30 g/day is required to convert ALA to EPA. Although all doses were well tolerated, 40 g/day is too low to attenuate cholesterol in this population. [ABSTRACT FROM AUTHOR]

Background: Childhood acquired brain injuries can disrupt communication functions needed for success in school, work and social interaction. Cognitive-communication difficulties may not be apparent until adolescence, when academic, environmental and social-emotional demands increase. Objective: The Functional Assessment of Verbal Reasoning and Executive Strategies for Students (S-FAVRES) is a new activity-level measure of cognitive-communication skills in complex, contextual and integrative tasks that simulate real world communication challenges. It is hypothesized that S-FAVRES performance would differentiate adolescents with and without acquired brain injury (ABI) on scores for Accuracy, Rationale, Reasoning Subskills and Time. Methods: S-FAVRES was administered to 182 typically-developing (TD) and 57 adolescents with mild-to-severe ABI aged 12–19. Group differences, internal consistency, sensitivity, specificity, reliability and contributing factors to performance (age, gender, brain injury) were examined statistically. Results: Those with ABI attained statistically lower Accuracy, Rationale and Reasoning sub-skills scores than their TD peers. Time scores were not significantly different. Performance trends were consistent across tasks, administrations, gender and age groups. Inter-rater reliability for scoring was acceptable. Conclusion: The S-FAVRES provides a reliable, functional and quantifiable measure of subtle cognitive-communication difficulties in adolescents that can assist speech-language pathologists in planning treatment and integration to school and real world communication. [ABSTRACT FROM AUTHOR]

The association of dietary exposures with health outcomes may be attenuated or reversed as a result of energy intake (EI) misreporting. This study evaluated several methods for dealing with implausible recalls when analysing the association between dietary factors and obesity. We examined data from 16 187 Canadians aged ≥12 years in the nationally representative Canadian Community Health Survey 2.2. Under- and over-reporting were defined as the ratio of EI:estimated energy requirement <0·7 and >1·42, respectively. Multinomial logistic regression-generalised logit model was conducted to test the utility of different methods for handling misreporting, including (a) adjusting for variables related to misreporting, (b) excluding misreported recalls, (c) adjusting for reporting groups (under-, plausible and over-reporters), (d) adjusting for propensity score and (e) stratifying the analyses by reporting groups. In the basic model, EI showed a negative association with overweight (OR 0·988; 95 % CI 0·979, 0·998) and obesity (OR 0·989; 95 % CI 0·977, 0·999). Similarly, the association between total energy density and overweight (OR 0·670; 95 % CI 0·487, 0·923) and obesity (OR 0·709; 95 % CI 0·495, 1·016) was inverse. Among all methods of handling misreporting, adjusting for the reporting status revealed the most satisfactory results, where a positive association between EI and overweight (OR 1·037; 95 % CI 1·019, 1·055) and obesity (OR 1·109; 95 % CI 1·082, 1·137) was observed (P<0·0001), as well as direct positive associations between energy density and percentage energy from solid fats and added sugars with obesity (P<0·05). The results of this study can help advance knowledge about the relationship between dietary variables and obesity and demonstrate to researchers and nutrition policy makers the importance of adjusting for recall plausibility in obesity research, which is highly relevant in light of global obesity epidemic. [ABSTRACT FROM AUTHOR]

Background: Mandatory fortification, prevalent supplement use, and public health guidelines recommending periconceptional supplementation have increased folic acid intakes in North American pregnant women. However, the effects of increased folic acid intakes during pregnancy on maternal and cord blood folate concentrations have not been well established. Objectives: In this prospective study, we determined maternal and cord blood concentrations of folate and unmetabolized folic acid (UMFA) in a cohort of pregnant Canadian women and their newborns and examined the effect of maternal intakes of folate and folic acid and fetal genetic variants in folate metabolism on folate status. Design: Folate and folic acid intakes of 368 Canadian pregnant women were assessed in early (0-16 wk) and late (23-37 wk) pregnancy. Blood concentrations of folate and UMFAwere measured with the use of immunoassays and liquid chromatography-mass spectrometry, respectively, in maternal samples in early pregnancy (12-16 wk), at delivery (28-42 wk), and in cord blood. Four fetal genetic variants of the 5,10-methylenetetrahydrofolate reductase (MTHFR) and dihydrofolate reductase (DHFR) genes were assessed for their association with cord blood concentrations of folate and UMFA. Results: Geometric mean (95% CI) maternal red blood cell (RBC) folate concentrations were 2417 nmol/L (2362, 2472 nmol/L ) and 2793 nmol/L (2721, 2867 nmol/L ) in early pregnancy and at delivery, respectively. The mean (95% CI) cord RBC folate concentration was 2689 nmol/L (2614, 2765 nmol/L). UMFA was detectable in .90% of maternal and cord plasma samples. Although 3 fetal MTHFR and DHFR genetic variants had no effect, the fetal MTHFR 677TT genotype was associated with significantly lower cord serum (P = 0.03) and higher cord RBC (P = 0.02) folate concentrations than those of the wild type. Conclusions: Notwithstanding differences in assays, maternal and cord RBC folate and plasma UMFA concentrations were higher than previously reported values. Functional ramifications of high folate and UMFA concentrations in maternal and fetal circulation warrant additional investigation because an excess folate status may affect long-term health outcomes of the offspring. This study was registered at www.clinicaltrials.gov as NCT02244684. [ABSTRACT FROM AUTHOR]

Background Traditionally, the Arctic diet has been derived entirely from locally harvested animal and plant species; however, in recent decades, imported foods purchased from grocery stores have become widely available. The present study aimed to examine Inuvialuit, traditional or nontraditional dietary patterns; nutrient density of the diet; dietary adequacy; and main food sources of energy and selected nutrient intakes. Methods This cross-sectional study used a culturally appropriate quantitative food frequency questionnaire to assess diet. Traditional and nontraditional eaters were classified as those consuming more or less than 300 g of traditional food daily. Nutrient densities per 4184 kJ (1000 kcal) were determined. Dietary adequacy was determined by comparing participants' nutrient intakes with the Dietary Reference Intakes. Results The diet of nontraditional eaters contained, on average, a lower density of protein, niacin, vitamin B12, iron, selenium, zinc, omega-3 fatty acids ( P ≤ 0.0001), vitamin B6, potassium, thiamin, pantothenic acid ( P ≤ 0.001), riboflavin and magnesium ( P ≤ 0.05). Inadequate nutrient intake was more common among nontraditional eaters for calcium, folate, vitamin C, zinc, thiamin, pantothenic acid, vitamin K, magnesium, potassium and sodium. Non-nutrient-dense foods (i.e. high fat and high sugar foods) contributed to energy intake in both groups, more so among nontraditional eaters (45% versus 33%). Traditional foods accounted for 3.3% and 20.7% of total energy intake among nontraditional and traditional eaters, respectively. Conclusions Diet quality and dietary adequacy were better among Inuvialuit who consumed more traditional foods. The promotion of traditional foods should be incorporated in dietary interventions for this population. [ABSTRACT FROM AUTHOR]

BACKGROUND: Nutritional assessment commonly includes multiple nutrition indicators (NIs). To promote efficiency, a minimum set is needed for the diagnosis of malnutrition in the acute care setting. OBJECTIVE: The objective was to compare the ability of different NIs to predict outcomes of length of hospital stay and readmission to refine the detection of malnutrition in acute care. DESIGN: This was a prospective cohort study of 1022 patients recruited from 18 acute care hospitals (academic and community), from 8 provinces across Canada, between 1 July 2010 and 28 February 2013. Participants were patients aged ≥18 y admitted to medical and surgical wards. NIs measured at admission were subjective global assessment (SGA; SGA A = well nourished, SGA B = mild or moderate malnutrition, and SGA C = severe malnutrition), Nutrition Risk Screening (2002), body weight, midarm and calf circumference, serum albumin, handgrip strength (HGS), and patient-self assessment of food intake. Logistic regression determined the independent effect of NIs on the outcomes of length of hospital stay (<7 d and ≥7 d) and readmission within 30 d after discharge. RESULTS: In total, 733 patients had complete NI data and were available for analysis. After we controlled for age, sex, and diagnosis, only SGA C (OR: 2.19; 95% CI: 1.28, 3.75), HGS (OR: 0.98; 95% CI: 0.96, 0.99 per kg of increase), and reduced food intake during the first week of hospitalization (OR: 1.51; 95% CI: 1.08, 2.11) were independent predictors of length of stay. SGA C (OR: 2.12; 95% CI: 1.24, 3.93) and HGS (OR: 0.96; 95% CI: 0.94, 0.98) but not food intake were independent predictors of 30-d readmission. CONCLUSIONS: SGA, HGS, and food intake were independent predictors of outcomes for malnutrition. Because food intake in this study was judged days after admission and HGS has a wide range of normal values, SGA is the single best predictor and should be advocated as the primary measure for diagnosis of malnutrition. This study was registered at clinicaltrials.gov as NCT02351661. [ABSTRACT FROM AUTHOR]

Objectives DSM-5 changes for eating disorders (EDs) aimed to reduce preponderance of non-specified cases and increase validity of specific diagnoses. The objectives were to estimate the combined effect of changes on prevalence of EDs in adolescents and examine validity of diagnostic groupings. Method A total of 3043 adolescents (1254 boys and 1789 girls, Mage = 14.19 years, SD = 1.61) completed self-report questionnaires including the Eating Disorder Diagnostic Scale. Results Prevalence of full-threshold EDs increased from 1.8% (DSM-IV) to 3.7% (DSM-5), with a higher prevalence of bulimia nervosa (1.6%) and the addition of the diagnosis of purging disorder (1.4%); prevalence of binge eating disorder was unchanged (0.5%), and non-specified cases decreased from 5.1% (DSM-IV) to 3.4% (DSM-5). Validation analyses demonstrated that DSM-5 ED subgroups better captured variance in psychopathology than DSM-IV subgroups. Discussion Findings extend results from previous prevalence and validation studies into the adolescent age range. Improved diagnostic categories should facilitate identification of EDs and indicate targeted treatments. Copyright © 2014 John Wiley & Sons, Ltd and Eating Disorders Association. [ABSTRACT FROM AUTHOR]

Aims To describe and compare the outcomes of a nurse practitioner-managed cardiac surgery follow-up model of care with the standard model of primary care provider follow-up for coronary artery bypass graft surgery patients. Background Advances in healthcare have had a favourable impact on length of stay following cardiac surgery; however, the shorter length of stay has not been accompanied by enhanced support to bridge the gap between acute care and the community setting. Design Prospective (2009-2010) randomized study. Methods Elective cardiac surgery patients ( N = 200) were randomly assigned to the nurse practitioner follow-up intervention or to the standard model of follow-up care. The main outcomes were health-related quality of life, patient satisfaction, symptoms, and health resource use. Outcome data were elicited via telephone interviews at 2 and 6 weeks postdischarge. Results Baseline differences between the two groups were non-significant; however, at 2 weeks postdischarge, the intervention group reported significantly fewer symptoms and higher physical functioning status. At 2 and 6 weeks postdischarge, the intervention group was significantly more satisfied with the amount of help, as well as the quality of the services received. Differences in healthcare resource use were not statistically significant. Conclusion This evidence suggests that the nurse practitioner-managed model of follow-up care effectively bridges the gap between institutional and primary care in the cardiac surgery population. [ABSTRACT FROM AUTHOR]

The article reports a study which was conducted to determine the incidence of brachial neuropraxia (stingers) in Canadian Atlantic University football players. The results revealed that brachial neuropraxia was a common injury in Canadian varsity football players but stingers were underreported. This suggests that there is a need for increased education regarding stingers to athletes who are at risk of brachial neuropraxia.

Abstract: This study sought to examine the influence of length of stay and language proficiency on immigrants’ access to and utilization of care in Canada and the United States (US). Data came from the 2007–2008 Canadian Community Health Survey and the National Health Interview Survey. Analyses were limited to foreign-born, non-elderly adults in each country (n = 12,870 in Canada and n = 7440 in the US). Health care indicators included having a usual source of care; annual consultation with a health professional, dentist, and eye doctor; flu shot in the past year; and Pap test in the past 3 years. Logistic regression models were employed to estimate the relative odds of access or use of care, adjusting for need, demographic factors, socioeconomic status, and insurance coverage. In general, rates of health care access and utilization were higher in Canada than the US among all immigrant groups. In both countries, adjusted analyses indicated that immigrants with shorter length of stay (less than 10 years) and limited language proficiency generally had lower rates of access/use compared with those with longer length of stay (10 years or more) and proficiency in each country’s official language(s), respectively. There was one exception to this pattern in the US: immigrants with limited English had higher odds of having a recent Pap test relative to English-proficient immigrants. The persistence of disparities in health care experiences based on length of stay and language proficiency in Canada suggests that universal health insurance coverage may not be sufficient for ensuring access to and utilization of primary and preventive care for this population. [Copyright &y& Elsevier]

The focus of the current study is whether, and why, female patients limit or alter their personal histories when discussing sensitive subject matter with their physician in birth control clinics. Fifty-six female patients (M = 21.6 years, SD = 3.05) completed anonymous questionnaires exploring their comfort with and ability to disclose personal histories in the immediately preceding interview with the physician. The present study used communication privacy management (CPM) as the theoretical lens through which to view the interaction. Approximately one-half of the sample (46%) reported limiting or altering information. Patients with a highly permeable privacy orientation, as evidenced by a history of open communication regarding sexual issues, were those who reported fully disclosing to their physicians. Of the physician characteristics considered to map onto patient privacy rules, the physician's gender, hurriedness, friendliness, use of a first-name introduction, and open-ended questions were significantly related to patients' reported ease in fully disclosing personal information (p < .05). This study presents a novel application of CPM and has implications for training medical students and for parent–child communication regarding sexual issues. [ABSTRACT FROM PUBLISHER]

Abstract: A large body of research shows that social determinants of health have significant impact on the health of Canadians and Americans. Yet, very few studies have directly compared the extent to which social factors are associated with health in the two countries, in large part due to the historical lack of comparable cross-national data. This study examines differences in the effect of a wide-range of social determinants on self-rated health across the two populations using data explicitly designed to facilitate comparative health research—Joint Canada/United States Survey of Health. The results show that: 1) sociodemographic and socioeconomic factors have substantial effects on health in each country, though the size of the effects tends to differ—gender, nativity, and race are stronger predictors of health among Americans while the effects of age and marital status on health are much larger in Canada; the income gradient in health is steeper in Canada whereas the education gradient is steeper in the U.S.; 2) Socioeconomic status (SES) mediates or links sociodemographic variables with health in both countries—the observed associations between gender, race, age, and marital status and health are considerably weakened after adjusting for SES; 3) psychosocial, behavioural risk and health care access factors are very strong determinants of health in each country, however being severely/morbidly obese, a smoker, or having low life satisfaction has a stronger negative effect on the health of Americans, while being physically inactive or having unmet health care needs has a stronger effect among Canadians; and 4) risk and health care access factors together play a relatively minor role in linking social structural factors to health. Overall, the findings demonstrate the importance of social determinants of health in both countries, and that some determinants matter more in one country relative to the other. [Copyright &y& Elsevier]

Abstract Objectives To examine whether several food purchasing behaviors (ie, sources of meals or snacks) are associated with adolescents' sugar-sweetened beverage (SSB) consumption and whether these associations vary by province. Design Cross-sectional observational study. Setting Alberta and Ontario, Canada. Participants Secondary school students from Alberta (n = 3,300) and Ontario (n = 37,999) participating in year 2 (2013–2014) of the Cannabis Use, Obesity, Mental Health, Physical Activity, Alcohol Use, Smoking, Sedentary Behavior (COMPASS) study. Main Outcome Measures Participants' self-reported frequency of consuming 3 SSB types (soft drinks, sweetened coffees/teas, and energy drinks) in a typical week. Analysis Hierarchical Poisson regression analyses. Results Participants from Alberta had a significantly ( P <.05) higher rate of consuming SSBs and purchasing meals or snacks from school food outlets compared with their Ontario counterparts. Most of the food purchasing behaviors were significantly ( P <.05) and positively associated with greater rates of SSB consumption. Meal or snack purchases on weekends (vs weekdays) and from food outlets off school property (vs on school property) had a greater association with SSB consumption. Eating a home-packed lunch was protective against SSB consumption across models. Conclusions and Implications Adolescents' food purchasing behaviors have a significant impact on their propensity for SSB consumption. These data demonstrate potentially important contexts for SSB consumption and have implications for possible settings and strategies for future interventions to reduce adolescents' SSB intake. [ABSTRACT FROM AUTHOR]