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1.
J Gen Intern Med ; 38(16): 3549-3557, 2023 Dec.
Article in English | MEDLINE | ID: mdl-37670068

ABSTRACT

BACKGROUND: Transgender and gender diverse (TGD) veterans have a greater prevalence of suicide morbidity and mortality than cisgender veterans. Gender-affirming surgery (GAS) has been shown to improve mental health for TGD veterans. In 2021, the Veterans Health Administration (VHA) announced the initiation of a rulemaking process to cover GAS for TGD patients. OBJECTIVE: This study explores patients' and providers' perspectives about access to GAS and other gender-affirming medical interventions not offered in the VHA including barriers, facilitators, and clinical and policy recommendations. PARTICIPANTS: TGD patients (n = 30) and VHA providers (n = 22). APPROACH: Semi-structured telephone interviews conducted from August 2019 through January 2020. Two TGD analysts used conventional and directed content analysis to code transcribed data. KEY RESULTS: VHA policy exclusions were the most cited barrier to GAS. Additional barriers included finding information about GAS, traveling long distances to non-VHA surgeons, out-of-pocket expenses, post-surgery home care, and psychological challenges related to the procedure. Factors facilitating access included surgical care information from peers and VHA providers coordinating care with non-VHA GAS providers. Pre- and post-operative care through the VHA also facilitated receiving surgery; however, patients and providers indicated that knowledge of these services is not widespread. Respondents recommended disseminating information about GAS-related care and resources to patients and providers to help patients navigate care. Additional recommendations included expanding access to TGD mental health specialists and establishing referrals to non-VHA GAS providers through transgender care coordinators. Finally, transfeminine patients expressed the importance of facial GAS and hair removal. CONCLUSIONS: A policy change to include GAS in the VHA medical benefits package will allow the largest integrated healthcare system in the United States to provide evidence-based GAS services to TGD patients. For robust and consistent policy implementation, the VHA must better disseminate information about VHA-provided GAS-related care to TGD patients and providers while building capacity for GAS delivery.


Subject(s)
Transgender Persons , Transsexualism , Veterans , Humans , United States , Veterans Health , Gender Identity , Transgender Persons/psychology , Veterans/psychology , Patient Outcome Assessment
2.
Diabetes Care ; 46(8): 1464-1468, 2023 08 01.
Article in English | MEDLINE | ID: mdl-37319007

ABSTRACT

OBJECTIVE: We evaluated the effectiveness of remote foot temperature monitoring (RTM) in the Veterans Affairs health care system. RESEARCH DESIGN AND METHODS: We conducted a retrospective cohort study that included 924 eligible patients enrolled in RTM between 2019 and 2021 who were matched up to 3:1 to 2,757 nonenrolled comparison patients. We used conditional Cox regression to estimate adjusted cause-specific hazard ratios (aHRs) and corresponding 95% CIs for lower-extremity amputation (LEA) as the primary outcome and all-cause hospitalization and death as secondary outcomes. RESULTS: RTM was not associated with LEA incidence (aHR 0.92, 95% CI 0.62-1.37) or all-cause hospitalization (aHR 0.97, 95% CI 0.82-1.14) but was inversely associated (reduced risk) with death (aHR 0.63, 95% CI 0.49-0.82). CONCLUSIONS: This study does not provide support that RTM reduces the risk of LEA or all-cause hospitalization in individuals with a history of diabetic foot ulcer. Randomized controlled trials can overcome important limitations.


Subject(s)
Delivery of Health Care, Integrated , Diabetic Foot , Humans , Retrospective Studies , Temperature , Diabetic Foot/surgery , Diabetic Foot/epidemiology , Amputation, Surgical , Risk Factors
3.
BMJ Open ; 11(9): e051885, 2021 09 23.
Article in English | MEDLINE | ID: mdl-34556516

ABSTRACT

OBJECTIVES: To evaluate feasibility and acceptability of a group-based nature recreation intervention (nature hiking) and control condition (urban hiking) for military Veterans with post-traumatic stress disorder (PTSD). DESIGN AND SETTING: A pilot randomised controlled trial conducted in the US Pacific Northwest. PARTICIPANTS: Veterans with PTSD due to any cause. INTERVENTIONS: Twenty-six participants were randomised to a 12-week intervention involving either six nature hikes (n=13) or six urban hikes (n=13). PRIMARY AND SECONDARY OUTCOME MEASURES: Feasibility was assessed based on recruitment, retention and attendance. Questionnaires and postintervention qualitative interviews were conducted to explore intervention acceptability. Questionnaires assessing acceptability and outcomes planned for the future trial (eg, PTSD symptoms) were collected at baseline, 6 weeks, 12 weeks (immediately after the final hike) and 24 weeks follow-up. RESULTS: Of 415 people assessed for eligibility/interest, 97 were interested and passed preliminary eligibility screening, and 26 were randomised. Mean completion of all questionnaires was 91% among those in the nature hiking group and 68% in those in the urban hiking group. Over the course of the intervention, participants in the nature and urban groups attended an average of 56% and 58%, respectively, of scheduled hikes. Acceptability of both urban and nature hikes was high; over 70% reported a positive rating (ie, good/excellent) for the study communication, as well as hike locations, distance and pace. Median PTSD symptom scores (PTSD Checklist-5) improved more at 12 weeks and 24 weeks among those in the nature versus urban hiking group. CONCLUSIONS: This pilot study largely confirmed the feasibility and acceptability of nature hiking as a potential treatment for Veterans with PTSD. Adaptations will be needed to improve recruitment and increase hike attendance for a future randomised controlled trial to effectively test and isolate the ways in which nature contact, physical activity and social support conferred by the group impact outcomes. TRIAL REGISTRATION NUMBER: NCT03997344.


Subject(s)
Stress Disorders, Post-Traumatic , Veterans , Feasibility Studies , Humans , Pilot Projects , Stress Disorders, Post-Traumatic/therapy , Surveys and Questionnaires
4.
J Rural Health ; 35(3): 308-318, 2019 06.
Article in English | MEDLINE | ID: mdl-30600557

ABSTRACT

PURPOSE: Interactive clinical video telemedicine (CVT) has the potential to benefit health care systems and patients by improving access, lowering costs, and more efficiently distributing providers. However, there is a gap in current knowledge around the demand for and potential uses of CVT in large integrated health care systems. METHODS: We conducted an observational study using Veterans Health Administration (VHA) administrative databases to analyze trends in CVT utilization, and types of care received, among 7.65 million veterans during fiscal years (FY) 2009-2015 (October 1, 2008-September 30, 2015). Trends were stratified by veteran rurality and analyzed using linear regression. Among 4.95 million veterans in FY2015, we used logistic regression to identify characteristics associated with CVT utilization for any care, mental health care, and major specialties. FINDINGS: Over 6 years, the annual CVT utilization grew from 30 to 124 encounters per 1,000 veterans (>300% increase), with faster growth among rural veterans than urban veterans. Over the study period, ≥50% of all CVT-delivered care was mental health care. In FY2015, 3.2% of urban and 7.2% of rural veterans utilized CVT for nearly 725,000 clinical encounters. Rural residence, younger age, longer driving distance to VHA facilities, one or more comorbidities, and higher rates of traditional, non-video utilization were independently associated with higher odds of CVT use. CONCLUSIONS: CVT utilization in VHA has increased quickly and exceeds published rates in the private health care market. The availability of CVT has likely increased access to VHA care for rural veterans, especially for mental health care.


Subject(s)
Patient Acceptance of Health Care/statistics & numerical data , Rural Population/statistics & numerical data , Telemedicine/statistics & numerical data , Urban Population/statistics & numerical data , Adult , Aged , Aged, 80 and over , Delivery of Health Care/statistics & numerical data , Female , Humans , Male , Middle Aged , Telemedicine/methods , United States , United States Department of Veterans Affairs/organization & administration , United States Department of Veterans Affairs/statistics & numerical data
5.
J Phys Act Health ; 15(6): 430-439, 2018 06 01.
Article in English | MEDLINE | ID: mdl-29543106

ABSTRACT

BACKGROUND: Although perinatal walking and yoga have been associated with decreased risks of pregnancy complications, associations with offspring birth size have been inconsistent. We investigated associations of prepregnancy and early pregnancy leisure-time light/moderate walking and yoga practice with birth size. METHODS: Study participants (N = 3687) reported leisure-time physical activity duration (hours per week) in the year before pregnancy and early pregnancy. Birth size was abstracted from medical records. Regression was used to determine mean differences in birth weight, head circumference, and ponderal index. Interaction terms were used to assess effect modification by offspring sex. RESULTS: About one-third of women reported light/moderate leisure-time walking and about 10% reported yoga practice. Women in the highest tertile for prepregnancy (mean: 2.9 h/wk; range: 1.4-20 h/wk) or early pregnancy (mean: 5.9 h/wk; range: 3.1-24 h/wk) light/moderate walking had offspring with 0.9 and 1.5 kg/m3 greater ponderal index (95% confidence interval, 0.3 to 1.4 and 0.7 to 2.4, respectively) compared with women who reported no light/moderate walking in the same time period. Light/moderate walking was not associated with birth weight or head circumference. Yoga practice was not associated with birth size. Associations were similar by offspring sex. CONCLUSION: Light/moderate leisure-time walking may be associated with greater offspring ponderal index.


Subject(s)
Birth Weight/physiology , Leisure Activities , Walking/physiology , Yoga , Adult , Female , Humans , Infant, Newborn , Male , Pregnancy , Pregnancy Complications/epidemiology , Prospective Studies , Risk Factors
6.
J Altern Complement Med ; 19(9): 751-8, 2013 Sep.
Article in English | MEDLINE | ID: mdl-23663078

ABSTRACT

OBJECTIVES: This study aimed to identify demographic, psychological, health-related, and geographic predictors of adherence to home-based and supervised components of a yoga intervention in breast cancer survivors. METHODS: Participants were the 32 post-treatment breast cancer survivors who were randomized to the Viniyoga intervention arm of a controlled trial. Participants were asked to practice yoga 5 times per week for 6 months, including at least one weekly facility-based session. Adherence was monitored using sign-in sheets and logs. Height and weight were measured; other potential predictors of adherence were obtained from baseline questionnaires. RESULTS: Participants attended 19.6±13.0 yoga classes and performed 55.8±32.8 home-based yoga sessions. Participants adhered to 58% of the overall yoga practice goal (75% of the goal for yoga classes and 54% of the goal for home based-sessions). Higher class attendance and home practice were predicted by greater self-efficacy for yoga (p=0.004 and 0.06, respectively). Additionally, employment outside the home was associated with greater class attendance (p=0.004), while higher waist circumference was marginally associated with lower adherence to home-based yoga (p=0.05). CONCLUSIONS: High levels of facility- and home-based yoga practice were achieved. Breast cancer survivors who have lower self-efficacy for yoga or who have a higher waist circumference may benefit from additional support or intervention tailoring. Adherence may also be improved by ensuring that class times are convenient to both working and nonworking women.


Subject(s)
Breast Neoplasms/psychology , Patient Compliance , Survivors/psychology , Yoga , Aged , Female , Humans , Middle Aged , Quality of Life
7.
Support Care Cancer ; 20(2): 267-77, 2012 Feb.
Article in English | MEDLINE | ID: mdl-21207071

ABSTRACT

PURPOSE: To obtain estimates of time to recruit the study sample, retention, facility-based class attendance and home practice for a study of yoga in breast cancer survivors, and its efficacy on fatigue, quality of life (QOL), and weight change. METHODS: Sixty-three post-treatment stages 0-III borderline overweight and obese (body mass index ≥ 24 kg/m(2)) breast cancer survivors were randomly assigned to a 6-month, facility- and home-based viniyoga intervention (n = 32) or a waitlist control group (n = 31). The yoga goal was five practices per week. Primary outcome measures were changes in QOL, fatigue, and weight from baseline to 6 months. Secondary outcomes included changes in waist and hip circumference. RESULTS: It took 12 months to complete recruitment. Participants attended a mean of 19.6 classes and practiced at home a mean of 55.8 times during the 6-month period. At follow-up, 90% of participants completed questionnaires and 87% completed anthropometric measurements. QOL and fatigue improved to a greater extent among women in the yoga group relative to women in the control group, although no differences were statistically significant. Waist circumference decreased 3.1 cm (95% CI, -5.7 and -0.4) more among women in the yoga compared with the control group, with no difference in weight change. CONCLUSIONS: This study provides important information regarding recruitment, retention, and practice levels achieved during a 6-month, intensive yoga intervention in overweight and obese breast cancer survivors. Yoga may help decrease waist circumference and improve quality of life; future studies are needed to confirm these results.


Subject(s)
Breast Neoplasms/rehabilitation , Obesity/therapy , Overweight/therapy , Yoga , Adult , Aged , Anthropometry , Body Weight , Fatigue/etiology , Fatigue/therapy , Female , Humans , Middle Aged , Obesity/epidemiology , Overweight/epidemiology , Pilot Projects , Quality of Life , Survivors , Waist Circumference
8.
J Am Diet Assoc ; 109(8): 1439-44, 2009 Aug.
Article in English | MEDLINE | ID: mdl-19631053

ABSTRACT

"Mindful eating" describes a nonjudgmental awareness of physical and emotional sensations associated with eating. This article reports the development of a mindful eating questionnaire (MEQ) to support rigorous scientific inquiry into this concept. An item pool was developed based on hypothesized domains of mindful eating. A cross-sectional survey examined associations of MEQ scores with demographic and health-related characteristics. The MEQ was distributed to seven convenience samples between January and May 2007, with an overall response rate of 62% (n=303). Participants were mostly women (81%) and white (90%), and had a mean age of 42+/-14.4 years (range 18 to 80 years). Exploratory factor analysis was used to identify factors, which were defined as the mean of items scored one to four, where four indicated higher mindfulness; the mean of all factors was the summary MEQ score. Multiple regression analysis was used to measure associations of demographic characteristics, obesity, yoga practice, and physical activity with MEQ scores. Domains of the final 28-item questionnaire were: disinhibition, awareness, external cues, emotional response, and distraction. The mean MEQ score was 2.92+/-0.37, with a reliability (Chronbach's alpha) of .64. The covariate-adjusted MEQ score was inversely associated with body mass index (3.02 for body mass index <25 vs 2.54 for body mass index >30, P<0.001). Yoga practice, but neither walking nor moderate/intense physical activity, was associated with higher MEQ score. In this study sample, the MEQ had good measurement characteristics. Its negative association with body mass index and positive association with yoga provide evidence of construct validity. Further evaluation in more diverse populations is warranted.


Subject(s)
Awareness , Eating/psychology , Feeding Behavior/psychology , Psychometrics/instrumentation , Surveys and Questionnaires/standards , Adolescent , Adult , Aged , Aged, 80 and over , Cross-Sectional Studies , Female , Humans , Male , Middle Aged , Regression Analysis , Self Concept , Unconscious, Psychology , Young Adult
9.
Cancer Causes Control ; 19(1): 75-87, 2008 Feb.
Article in English | MEDLINE | ID: mdl-17943452

ABSTRACT

OBJECTIVE: Vitamin E and selenium are promising nutrients for the prevention of prostate cancer, and both are currently being tested in a large randomized trial for prostate cancer. However, results are not expected for at least 6 years. We aimed to investigate the association of vitamin E and selenium supplementation with prostate cancer in the VITamins And Lifestyle (VITAL) study, a cohort study specifically designed to examine supplement use and future cancer risk. METHODS: In a prospective design, 35,242 men recruited between 2000 and 2002 from western Washington State completed a questionnaire, including detailed questions about vitamin E and selenium supplement intake during the past 10 years from brand-specific multivitamins and single supplements. Using linkage to the western Washington SEER cancer registry, we documented 830 new cases of prostate cancer from baseline through December 2004. RESULTS: A 10-year average intake of supplemental vitamin E was not associated with a reduced prostate cancer risk overall [hazard ratio (HR) 0.86, 95% confidence interval (CI) 0.65-1.1 for > or =400 IU/day vs. non-use, p for trend 0.36]; however, risk for advanced prostate cancer (regionally invasive or distant metastatic, n = 123) decreased significantly with greater intake of supplemental vitamin E (HR 0.43, 95% CI 0.19-1.0 for 10-year average intake > or =400 IU/day vs. non-use, p for trend 0.03). There was no association between selenium supplementation and prostate cancer risk (HR 0.90, 95% CI 0.62-1.3 for 10-year average intake >50 microg/day vs. non-use, p for trend 0.97). CONCLUSIONS: In this prospective cohort, long-term supplemental intake of vitamin E and selenium were not associated with prostate cancer risk overall; however, risk of clinically relevant advanced disease was reduced with greater long-term vitamin E supplementation.


Subject(s)
Dietary Supplements , Prostatic Neoplasms/prevention & control , Selenium/pharmacology , Vitamin E/pharmacology , Vitamins/pharmacology , Aged , Cohort Studies , Humans , Male , Middle Aged , Risk Factors , SEER Program
10.
Am J Respir Crit Care Med ; 177(5): 524-30, 2008 Mar 01.
Article in English | MEDLINE | ID: mdl-17989343

ABSTRACT

RATIONALE: Lung cancer is the leading cause of cancer-related mortality in the United States. Although supplements are used by half the population, limited information is available about their specific effect on lung cancer risk. OBJECTIVES: To explore the association of supplemental multivitamins, vitamin C, vitamin E, and folate with incident lung cancer. METHODS: Prospective cohort of 77,721 men and women aged 50-76 years from Washington State in the VITAL (VITamins And Lifestyle) study. Cases were identified through the Seattle-Puget Sound SEER (Surveillance, Epidemiology, and End Results) cancer registry. MEASUREMENTS AND MAIN RESULTS: Hazard ratios (HRs) for incident lung cancer according to 10-year average daily use of supplemental multivitamins, vitamin C, vitamin E, and folate. A total of 521 cases of lung cancer were identified. Adjusting for smoking, age, and sex, there was no inverse association with any supplement. Supplemental vitamin E was associated with a small increased risk of lung cancer (HR, 1.05 for every 100-mg/d increase in dose; 95% confidence interval [CI], 1.00-1.09; P = 0.033). This risk of supplemental vitamin E was largely confined to current smokers (HR, 1.11 for every 100-mg/d increase; 95% CI, 1.03-1.19; P < 0.01) and was greatest for non-small cell lung cancer (HR, 1.07 for every 100-mg/d increase; 95% CI, 1.02-1.12; P = 0.004). CONCLUSIONS: Supplemental multivitamins, vitamin C, vitamin E, and folate were not associated with a decreased risk of lung cancer. Supplemental vitamin E was associated with a small increased risk. Patients should be counseled against using these supplements to prevent lung cancer.


Subject(s)
Diet , Lung Neoplasms/epidemiology , Lung Neoplasms/prevention & control , Vitamins/administration & dosage , Aged , Ascorbic Acid/administration & dosage , Chemoprevention/methods , Dietary Supplements , Female , Folic Acid/administration & dosage , Humans , Lung Neoplasms/mortality , Male , Middle Aged , Vitamin E/administration & dosage , Vitamin E/adverse effects , Vitamins/adverse effects
11.
Nutr Cancer ; 55(1): 21-7, 2006.
Article in English | MEDLINE | ID: mdl-16965237

ABSTRACT

Saw palmetto is an herb used to treat the symptoms of benign prostatic hyperplasia. In vitro studies have found that saw palmetto inhibits growth of prostatic cancer cells and may induce apoptosis. To evaluate whether saw palmetto supplements are associated with a reduced risk of prostate cancer, we conducted a prospective cohort study of 35,171 men aged 50-76 yr in western Washington state. Subjects completed questionnaires between 2000 and 2002 on frequency of use of saw palmetto supplements and saw palmetto-containing multivitamins over the previous 10 yr in addition to other information on supplement intake, medical history, and demographics. Men were followed through December 2003 (mean of 2.3 yr of follow-up) via the western Washington Surveillance, Epidemiology, and End Results cancer registry, during which time 580 developed prostate cancer. Ten percent of the cohort used saw palmetto at least once per week for a year in the 10 yr before baseline. No association was found between this level of use of saw palmetto and risk of prostate cancer development [hazard ratio (HR) = 0.95; 95% confidence interval = 0.74-1.23] or with increasing frequency or duration of use. In this free-living population, use of commercial saw palmetto, which varies widely in dose and constituent ratios, was not associated with prostate cancer risk.


Subject(s)
Androgen Antagonists/administration & dosage , Plant Extracts/administration & dosage , Prostatic Neoplasms/epidemiology , Aged , Cohort Studies , Confidence Intervals , Dietary Supplements , Dose-Response Relationship, Drug , Humans , Male , Middle Aged , Odds Ratio , Proportional Hazards Models , Prospective Studies , Prostatic Hyperplasia/epidemiology , Serenoa , Surveys and Questionnaires , Washington/epidemiology
12.
J Am Diet Assoc ; 106(7): 1066-73; quiz 1082, 2006 Jul.
Article in English | MEDLINE | ID: mdl-16815123

ABSTRACT

OBJECTIVE: The goal of this study was to examine the purported effects of calcium on modulating body weight. DESIGN: Retrospective data was used to assess the relationship between calcium intake and weight change over an 8- to 12-year period among middle-aged adults. SUBJECTS: Participants were 10,591 men and women aged 53 to 57 years recruited during 2000-2002. STATISTICAL ANALYSIS: Linear regression was used to model associations of 10-year weight change and calcium intake, adjusted for weight at age 45 years, energy intake, physical activity, and other factors. RESULTS: Calcium intake was associated with 10-year weight change only in women. Women with current calcium supplement dose of >500 mg/day had a 10-year weight gain of 5.1 kg (95% confidence interval 4.7 to 5.5) compared to 6.9 kg (95% confidence interval 6.5 to 7.4) among nonusers (P for trend=0.001). Trends were similar for total calcium intake from diet plus supplements (P for trend=0.001). Dietary calcium alone had no significant effect on 10-year weight change. CONCLUSIONS: Increasing total calcium intake, in the form of calcium supplementation, may be beneficial to weight maintenance, especially in women during midlife.


Subject(s)
Body Weight/drug effects , Calcium, Dietary/administration & dosage , Dietary Supplements/statistics & numerical data , Obesity/prevention & control , Body Weight/physiology , Cohort Studies , Energy Intake/physiology , Exercise/physiology , Female , Humans , Linear Models , Longitudinal Studies , Male , Middle Aged , Retrospective Studies , Sex Factors , Surveys and Questionnaires , United States
13.
Altern Ther Health Med ; 11(4): 28-33, 2005.
Article in English | MEDLINE | ID: mdl-16053119

ABSTRACT

BACKGROUND: Yoga is promoted or weight maintenance, but there is little evidence of its efficacy. OBJECTIVE: To examine whether yoga practice is associated with lower mean 10-year weight gain after age 45. PARTICIPANTS: Participants included 15,550 adults, aged 53 to 57 years, recruited to the Vitamin and Lifestyle (VITAL) cohort study between 2000 and 2002. MEASUREMENTS: Physical activity (including yoga) during the past 10 years, diet, height, and weight at recruitment and at ages 30 and 45. All measures were based on self-reporting, and past weight was retrospectively ascertained. METHODS: Multiple regression analyses were used to examined covariate-adjusted associations between yoga practice and weight change from age 45 to recruitment, and polychotomous logistic regression was used to examine associations of yoga practice with the relative odds of weight maintenance (within 5%) and weight loss (> 5%) compared to weight gain. RESULTS: Yoga practice for four or more years was associated with a 3.1-lb lower weight gain among normal weight (BMI < 25) participants [9.5 lbs versus 12.6 Ibs] and an 18.5-lb lower weight gain among overweight participants [-5.0 lbs versus 13.5 Ibs] (both P for trend <.001). Among overweight individuals, 4+ years of yoga practice was associated with a relative odds of 1.85 (95% confidence interval [CI] 0.63-5.42) for weight maintenance (within 5%) and 3.88 (95% Cl 1.30-9.88) for weight loss (> 5%) compared to weight gain (P for trend .026 and .003, respectively). CONCLUSIONS: Regular yoga practice was associated with attenuated weight gain, most strongly among individuals who were overweight. Although causal inference from this observational study is not possible, results are consistent with the hypothesis that regular yoga practice can benefit individuals who wish to maintain or lose weight.


Subject(s)
Body Weight , Exercise , Obesity/prevention & control , Physical Fitness , Yoga , Adult , Attitude to Health , Cohort Studies , Female , Health Promotion/standards , Health Status , Humans , Life Style , Male , Regression Analysis , Retrospective Studies , Weight Gain
14.
Am J Epidemiol ; 159(1): 83-93, 2004 Jan 01.
Article in English | MEDLINE | ID: mdl-14693663

ABSTRACT

Vitamin and mineral supplements are among the most commonly used drugs in the United States, despite limited evidence on their benefits or risks. This paper describes the design, implementation, and participant characteristics of the VITamins And Lifestyle (VITAL) Study, a cohort study of the associations of supplement use with cancer risk. A total of 77,738 men and women in western Washington State, aged 50-76 years, entered the study in 2000-2002 by completing a detailed questionnaire on supplement use, diet, and other cancer risk factors, and 70% provided DNA through self-collected buccal cell specimens. Supplement users were targeted in recruitment: 66% used multivitamins, 46% used individual vitamin C, 47% used individual vitamin E, and 46% used calcium, typically for 5-8 of the past 10 years. Analyses to identify confounding factors, the main study limitation, showed that regular nonsteroidal anti-inflammatory drug use, intake of fruits and vegetables, and recreational physical activity were strongly associated with supplement use (p < 0.001). The authors describe a follow-up system in which cancers, deaths, and changes of residence are tracked efficiently, primarily through linkage to public databases. These methods may be useful to other researchers implementing a large cohort study or designing a passive follow-up system.


Subject(s)
Neoplasms/epidemiology , Neoplasms/prevention & control , Vitamins/administration & dosage , Aged , Cohort Studies , Dietary Supplements , Female , Follow-Up Studies , Humans , Life Style , Male , Middle Aged , Neoplasms/etiology , Research Design , SEER Program , Surveys and Questionnaires , Washington/epidemiology
15.
Am J Prev Med ; 24(1): 43-51, 2003 Jan.
Article in English | MEDLINE | ID: mdl-12554023

ABSTRACT

BACKGROUND: Over half of U.S. adults use vitamin or mineral supplements, and some are likely using supplements to treat chronic diseases or risk factors for disease. Information on the relationship between supplement use and medical conditions is useful to health professionals to understand the self-medication behavior of their patients, and important for researchers because medical conditions may be potential confounding factors in observational studies of supplement use and disease risk. METHODS: The cross-sectional data in this report are from 45,748 participants, aged 50 to 75 years, who completed a self-administered, mailed questionnaire on current dietary supplement use (multivitamins plus 16 individual vitamins or minerals), medical history (cancer, cardiovascular-related diseases, and other self-reported medical conditions), and demographic characteristics. RESULTS: Supplement use (mean number used at least once a week) was higher among respondents who were older, female, highly educated, Caucasian, and of normal body mass index (all p<0.001). After controlling for these covariates, supplement use was higher among those with the condition for 13 of the 21 conditions examined (p<0.01); only having diabetes or high stress was associated with using fewer supplements. For specific supplements, the strongest associations were for cardiovascular disease and its risk factors with vitamin E, niacin, and folate, and for calcium with indigestion and acid reflux disease. For several conditions, the relative odds of using specific supplements were consistently higher for men than for women. CONCLUSIONS: Supplement use was associated with many medical conditions in this cohort. However, these cross-sectional data do not permit inferences about the temporal sequence. Some associations appeared to be based on evidence for efficacy (e.g., folate with coronary artery disease), and others could be based on misinformation (e.g., selenium with benign prostatic hyperplasia).


Subject(s)
Dietary Supplements/statistics & numerical data , Health Status , Vitamins/administration & dosage , Age Distribution , Aged , Body Mass Index , Cohort Studies , Educational Status , Female , Humans , Male , Middle Aged , Obesity , Sex Distribution , Surveys and Questionnaires , Washington
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