Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 31
Filter
1.
J Am Acad Dermatol ; 72(5): 780-5.e3, 2015 May.
Article in English | MEDLINE | ID: mdl-25748297

ABSTRACT

BACKGROUND: A gene expression profile (GEP) test able to accurately identify risk of metastasis for patients with cutaneous melanoma has been clinically validated. OBJECTIVE: We aimed for assessment of the prognostic accuracy of GEP and sentinel lymph node biopsy (SLNB) tests, independently and in combination, in a multicenter cohort of 217 patients. METHODS: Reverse transcription polymerase chain reaction (RT-PCR) was performed to assess the expression of 31 genes from primary melanoma tumors, and SLNB outcome was determined from clinical data. Prognostic accuracy of each test was determined using Kaplan-Meier and Cox regression analysis of disease-free, distant metastasis-free, and overall survivals. RESULTS: GEP outcome was a more significant and better predictor of each end point in univariate and multivariate regression analysis, compared with SLNB (P < .0001 for all). In combination with SLNB, GEP improved prognostication. For patients with a GEP high-risk outcome and a negative SLNB result, Kaplan-Meier 5-year disease-free, distant metastasis-free, and overall survivals were 35%, 49%, and 54%, respectively. LIMITATIONS: Within the SLNB-negative cohort of patients, overall risk of metastatic events was higher (∼30%) than commonly found in the general population of patients with melanoma. CONCLUSIONS: In this study cohort, GEP was an objective tool that accurately predicted metastatic risk in SLNB-eligible patients.


Subject(s)
Gene Expression Profiling , Melanoma/genetics , Sentinel Lymph Node Biopsy , Disease-Free Survival , Humans , Kaplan-Meier Estimate , Melanoma/mortality , Melanoma/pathology , Neoplasm Metastasis , Neoplasm Staging , Prognosis , Regression Analysis , Reverse Transcriptase Polymerase Chain Reaction , Skin Neoplasms , Melanoma, Cutaneous Malignant
2.
Clin Cancer Res ; 21(1): 175-83, 2015 Jan 01.
Article in English | MEDLINE | ID: mdl-25564571

ABSTRACT

PURPOSE: The development of a genetic signature for the identification of high-risk cutaneous melanoma tumors would provide a valuable prognostic tool with value for stage I and II patients who represent a remarkably heterogeneous group with a 3% to 55% chance of disease progression and death 5 years from diagnosis. EXPERIMENTAL DESIGN: A prognostic 28-gene signature was identified by analysis of microarray expression data. Primary cutaneous melanoma tumor tissue was evaluated by RT-PCR for expression of the signature, and radial basis machine (RBM) modeling was performed to predict risk of metastasis. RESULTS: RBM analysis of cutaneous melanoma tumor gene expression reports low risk (class 1) or high risk (class 2) of metastasis. Metastatic risk was predicted with high accuracy in development (ROC = 0.93) and validation (ROC = 0.91) cohorts of primary cutaneous melanoma tumor tissue. Kaplan-Meier analysis indicated that the 5-year disease-free survival (DFS) rates in the development set were 100% and 38% for predicted classes 1 and 2 cases, respectively (P < 0.0001). DFS rates for the validation set were 97% and 31% for predicted classes 1 and 2 cases, respectively (P < 0.0001). Gene expression profile (GEP), American Joint Committee on Cancer stage, Breslow thickness, ulceration, and age were independent predictors of metastatic risk according to Cox regression analysis. CONCLUSIONS: The GEP signature accurately predicts metastasis risk in a multicenter cohort of primary cutaneous melanoma tumors. Preliminary Cox regression analysis indicates that the signature is an independent predictor of metastasis risk in the cohort presented.


Subject(s)
Biomarkers, Tumor/biosynthesis , Gene Expression Regulation, Neoplastic , Melanoma/genetics , Neoplasm Proteins/biosynthesis , Adult , Aged , Aged, 80 and over , Biomarkers, Tumor/genetics , Disease-Free Survival , Female , Gene Expression Profiling , Humans , Kaplan-Meier Estimate , Male , Melanoma/pathology , Middle Aged , Neoplasm Proteins/genetics , Neoplasm Staging , Risk Factors , Skin Neoplasms , Melanoma, Cutaneous Malignant
3.
Behav Sleep Med ; 12(1): 28-40, 2014.
Article in English | MEDLINE | ID: mdl-23470116

ABSTRACT

This study investigated the relation between generalized anxiety disorder (GAD) and frequency of bad dreams in older adults. A secondary analysis from a randomized clinical trial comparing cognitive behavioral therapy (CBT) for anxiety to enhanced usual care (EUC) assessed bad dream frequency at baseline, post treatment (3 months), and at 6, 9, 12, and 15 months. Of 227 participants (mean age = 67.4), 134 met GAD diagnostic criteria (CBT = 70, EUC = 64), with the remaining 93 serving as a comparison group. Patients with GAD had significantly more bad dreams than those without, and bad dream frequency was significantly associated with depression, anxiety, worry, and poor quality of life. CBT for anxiety significantly reduced bad dream frequency at post treatment and throughout follow up compared to EUC.


Subject(s)
Anxiety Disorders/psychology , Anxiety Disorders/therapy , Cognitive Behavioral Therapy , Dreams/physiology , Dreams/psychology , Aged , Anxiety Disorders/physiopathology , Depression/physiopathology , Depression/psychology , Female , Follow-Up Studies , Humans , Male , Mental Health , Middle Aged , Prevalence , Quality of Life
4.
Infect Dis Obstet Gynecol ; 2013: 525878, 2013.
Article in English | MEDLINE | ID: mdl-23606801

ABSTRACT

BACKGROUND: Infants born to mothers who are colonized with group B streptococcus (GBS) but received <4 hours of intrapartum antibiotic prophylaxis (IAP) are at-risk for presenting later with sepsis. We assessed if <4 hours of maternal IAP for GBS are associated with an increased incidence of clinical neonatal sepsis. MATERIALS AND METHODS: A retrospective cohort study of women-infant dyads undergoing IAP for GBS at ≥37-week gestation who presented in labor from January 1, 2003 through December 31, 2007 was performed. Infants diagnosed with clinical sepsis by the duration of maternal IAP received (< or ≥4-hours duration) were determined. RESULTS: More infants whose mothers received <4 hours of IAP were diagnosed with clinical sepsis, 13 of 1,149 (1.1%) versus 15 of 3,633 (0.4%), P = .03. Multivariate logistic regression analysis showed that treatment with ≥4 hours of IAP reduced the risk of infants being diagnosed with clinical sepsis by 65%, adjusted relative risk 0.35, CI 0.16-0.79, and P = .01. CONCLUSION: The rate of neonatal clinical sepsis is increased in newborns of GBS colonized mothers who receive <4 hours compared to ≥4 hours of IAP.


Subject(s)
Anti-Bacterial Agents/therapeutic use , Antibiotic Prophylaxis/methods , Infectious Disease Transmission, Vertical/prevention & control , Sepsis/prevention & control , Streptococcal Infections/transmission , Streptococcus agalactiae , Carrier State/drug therapy , Female , Humans , Incidence , Infant, Newborn , Male , Multivariate Analysis , Pregnancy , Retrospective Studies , Sepsis/epidemiology , Sepsis/microbiology , Streptococcal Infections/epidemiology , Streptococcal Infections/prevention & control , Texas/epidemiology , Time Factors
5.
J Immigr Minor Health ; 15(5): 910-7, 2013 Oct.
Article in English | MEDLINE | ID: mdl-22847640

ABSTRACT

This study was conducted to assess the association between prior history of respiratory disease and lung cancer among Mexican Americans using data from a multi-racial/ethnic lung cancer case-control study. Cases (n = 204) were patients with previously untreated lung cancer. Healthy control participants (n = 325) were recruited from a large physician group practice. Demographics, cigarette use, and history of respiratory disease were collected. Multivariable logistic regression models were used to estimate relative risk. Prior history of COPD (OR = 2.0; 95 % CI 1.2-3.3) and pneumonia (OR = 2.2; 95 % CI 1.3-3.6) were associated with an increased risk of lung cancer. These findings illustrate that prior COPD and pneumonia are associated with an increased risk of lung cancer among Mexican Americans. To our knowledge, this is one of largest case-control analyses assessing the role of respiratory disease and lung cancer risk specifically among Mexican-Americans.


Subject(s)
Carcinoma, Non-Small-Cell Lung/etiology , Lung Diseases/complications , Lung Neoplasms/etiology , Mexican Americans , Aged , Case-Control Studies , Confidence Intervals , Female , Humans , Male , Middle Aged , Odds Ratio , Pneumonia/complications , Pulmonary Disease, Chronic Obstructive/complications , Rhinitis, Allergic, Seasonal/complications , Risk Factors , Self Report , Smoking/adverse effects , Texas/epidemiology
6.
Ann Behav Med ; 45(2): 180-91, 2013 Apr.
Article in English | MEDLINE | ID: mdl-23086590

ABSTRACT

BACKGROUND: Low socioeconomic status (SES) exacerbates the high rate of smoking relapse in women following childbirth. PURPOSE: This study examined multiple models of potential mechanisms linking SES and postpartum smoking relapse among women who quit smoking due to pregnancy. METHODS: Participants were 251 women enrolled in a randomized clinical trial of a new postpartum smoking relapse prevention intervention. Four models of the prepartum mechanisms linking SES and postpartum smoking relapse were evaluated using a latent variable modeling approach. RESULTS: Each of the hypothesized models were a good fit for the data. As hypothesized, SES indirectly influenced postpartum smoking relapse through increased prepartum negative affect/stress, reduced sense of agency, and increased craving for cigarettes. However, the model that included craving as the sole final pathway between SES and relapse demonstrated superior fit when compared with all other models. CONCLUSIONS: Findings have implications for future interventions that aim to reduce postpartum relapse.


Subject(s)
Postpartum Period/psychology , Smoking/economics , Smoking/psychology , Social Class , Adolescent , Adult , Affect , Behavior, Addictive/economics , Behavior, Addictive/psychology , Female , Humans , Models, Psychological
7.
Carcinogenesis ; 33(4): 841-7, 2012 Apr.
Article in English | MEDLINE | ID: mdl-22318908

ABSTRACT

We investigated whether single nucleotide polymorphisms within ultraconserved elements (UCEs) are associated with susceptibility to overall colorectal cancer (CRC) and susceptibility to tumor site-specific CRC. The study included 787 CRC patients and 551 healthy controls. The study comprised of a training set (520 cases and 341 controls) and a replication set (267 cases and 210 controls). We observed associations in rs7849 and rs1399685 with CRC risk. For example, a dose-dependent trend (per-allele odds ratio (OR), 0.78; 95% confidence interval (CI), 0.63-1.00; P for trend = 0.05) associated with the variant allele of rs7849 in the training set. The significant trend toward a decrease in CRC risk was confirmed in the replication set (per-allele OR, 0.72; 95% CI, 0.52-0.99; P for trend = 0.044). When stratified by tumor location, for left-sided CRC (LCRC) risk, significant association was observed for the variant-containing genotypes of rs1399685 (OR, 1.77; 95% CI, 1.02-3.06) and the risk was replicated in the replication population (OR, 2.04; 95% CI, 1.02-4.07). The variant genotypes of rs9784100 and rs7849 conferred decreased risk but the associations were not replicated. Three right-sided CRC (RCRC) susceptibility loci were identified in rs6124509, rs4243289 and rs12218935 but none of the loci was replicated. Joint effects and potential higher order gene-gene interactions among significant variants further categorized patients into different risk groups. Our results strongly suggest that several genetic variants in the UCEs may contribute to CRC susceptibility, individually and jointly, and that different genetic etiology may be involved in RCRC and LCRC.


Subject(s)
Adenocarcinoma/genetics , Colorectal Neoplasms/genetics , Conserved Sequence , Genetic Predisposition to Disease , Genetic Variation , Humans , Polymorphism, Single Nucleotide
8.
Gastroenterol Res Pract ; 2012: 895807, 2012.
Article in English | MEDLINE | ID: mdl-22272194

ABSTRACT

Background. Despite the availability of multiple effective tests for colorectal cancer (CRC), screening rates are low. Greater understanding of barriers between screeners and nonscreeners may improve public health initiatives to increase CRC screening (CRCS). Methods. We conducted a content analysis of 625 responses to the question: "Was there anything that would have made getting tested easier?" Respondents were patients at a multispecialty practice who participated in a behavioral intervention trial to increase CRCS. Using clinic records, we classified patients as early-screeners (<6 months), late-screeners(6-12 months), and nonscreeners (>12 months). Results. Both screeners and nonscreeners reported the same categories of barriers. However, early-screeners predominantly cited dislike of test attributes such as bowel preparation, whereas nonscreeners cited concerns regarding finances and work and family responsibilities. Conclusion. Multilevel strategies that address scheduling barriers and external screening barriers may improve CRCS. Future studies may test hypotheses about mediators explaining how screeners overcome barriers.

9.
J Gen Intern Med ; 27(4): 413-9, 2012 Apr.
Article in English | MEDLINE | ID: mdl-22033742

ABSTRACT

BACKGROUND: Clinical inertia, provider failure to appropriately intensify treatment, is a major contributor to uncontrolled blood pressure (BP). Some clinical inertia may result from physician uncertainty over the patient's usual BP, adherence, or value of continuing efforts to control BP through lifestyle changes. OBJECTIVE: To test the hypothesis that providing physicians with uncertainty reduction tools, including 24-h ambulatory BP monitoring, electronic bottle cap monitoring, and lifestyle assessment and counseling, will lead to improved BP control. DESIGN: Cluster randomized trial with five intervention clinics (IC) and five usual care clinics (UCC). SETTING: Six public and 4 private primary care clinics. PARTICIPANTS: A total of 665 patients (63 percent African American) with uncontrolled hypertension (BP ≥140 mmHg/90 mmHg or ≥130/80 mmHg if diabetic). INTERVENTIONS: An order form for uncertainty reduction tools was placed in the IC participants' charts before each visit and results fed back to the provider. OUTCOME MEASURES: Percent with controlled BP at last visit. Secondary outcome was BP changes from baseline. RESULTS: Median follow-up time was 24 months. IC physicians intensified treatment in 81% of IC patients compared to 67% in UCC (p < 0.001); 35.0% of IC patients and 31.9% of UCC patients achieved control at the last recorded visit (p > 0.05). Multi-level mixed effects longitudinal regression modeling of SBP and DBP indicated a significant, non-linear slope difference favoring IC (p (time × group interaction) = 0.048 for SBP and p = 0.001 for DBP). The model-predicted difference attributable to intervention was -2.8 mmHg for both SBP and DBP by month 24, and -6.5 mmHg for both SBP and DBP by month 36. CONCLUSIONS: The uncertainty reduction intervention did not achieve the pre-specified dichotomous outcome, but led to lower measured BP in IC patients.


Subject(s)
Blood Pressure Determination/methods , Hypertension/prevention & control , Physicians/standards , Uncertainty , Blood Pressure Determination/instrumentation , Chi-Square Distribution , Cluster Analysis , Diastole , Female , Humans , Hypertension/diagnosis , Linear Models , Male , Middle Aged , Prospective Studies , Statistics as Topic , Systole
10.
Cancer ; 118(10): 2726-34, 2012 May 15.
Article in English | MEDLINE | ID: mdl-21948225

ABSTRACT

BACKGROUND: The purpose of this study was to identify factors associated with colorectal cancer (CRC) screening test preference and examine the association between test preference and test completed. METHODS: Patients (n = 1224) were 50-70 years, at average CRC risk, and overdue for screening. Outcome variables were preference for fecal occult blood test (FOBT), colonoscopy (COL), sigmoidoscopy (SIG), or barium enema (BE), measured by telephone survey, and concordance between test preference and test completed assessed using medical records. RESULTS: Thirty-five percent preferred FOBT, 41.1% COL, 12.7% SIG, and 5.7% BE. Preference for SIG or COL was associated with having a physician recommendation, greater screening readiness, test-specific self-efficacy, greater CRC worry, and perceived pros of screening. Preference for FOBT was associated with self-efficacy for doing FOBT. Participants who preferred COL were more likely to complete COL compared with those who preferred another test. Of those screened, only 50% received their preferred test. Those not receiving their preferred test most often received COL (52%). CONCLUSIONS: Lack of concordance between patient preference and test completed suggests that patients' preferences are not well incorporated into screening discussions and test decisions, which could contribute to low screening uptake. Physicians should acknowledge patients' preferences when discussing test options and making recommendations, which may increase patients' receptivity to screening.


Subject(s)
Colorectal Neoplasms/diagnosis , Early Detection of Cancer/methods , Aged , Colonoscopy , Female , Humans , Male , Middle Aged , Multivariate Analysis , Occult Blood , Primary Health Care , Sigmoidoscopy
11.
Am J Health Behav ; 35(1): 71-80, 2011.
Article in English | MEDLINE | ID: mdl-20950160

ABSTRACT

OBJECTIVES: To determine whether self-reported exercise duration and intensity matched accelerometer data in sedentary endometrial cancer survivors and age-matched controls. METHODS: Participants were asked to wear an accelerometer and self-report exercise bouts, duration, and intensity for one week. Self-reported duration was compared with accelerometer data. RESULTS: Self-reported exercise-bout duration matched accelerometer duration 93% for survivors and 99% for controls. Self-reported exercise-bout intensity matched accelerometer intensity 70% for survivors and 66% for controls. There were no significant differences between groups. CONCLUSIONS: Sedentary endometrial cancer survivors and controls self-reported duration and intensity of physical activity consistent with accelerometer data.


Subject(s)
Exercise/psychology , Monitoring, Ambulatory/instrumentation , Sedentary Behavior , Self Report , Survivors/psychology , Adult , Aged , Female , Humans , Middle Aged , Monitoring, Ambulatory/methods
12.
Genes Chromosomes Cancer ; 50(1): 1-12, 2011 Jan.
Article in English | MEDLINE | ID: mdl-20842733

ABSTRACT

Genetic instability plays a crucial role in cancer development. The genetic stability of the cell as well as DNA methylation status could be modulated by folate levels. Several studies suggested associations between polymorphisms in folate genes and alterations in protein expression and variations in serum levels of the folate. The objective of this study was to investigate the effect of folate pathway polymorphisms on modulating genetic instability and lung cancer risk. Genotyping of 5 SNPs in folate pathway genes and cytokinesis-blocked micronucleus cytome assay analysis (to determine the genetic instability at baseline and following NNK treatment) was conducted on 180 lung cancer cases and 180 age-, gender-, and smoking-matched controls. Our results showed that individually, folate pathway SNPs were not associated with cytogenetic damage or lung cancer risk. However, in a polygenic disease such as lung cancer, gene-gene interactions are expected to play an important role in determining the phenotypic variability of the diseases. We observed that interactions between MTHFR677, MTHFR1298, and SHMT polymorphisms may have a significant impact on genetic instability in lung cancer patients. With regard to cytogenetic alterations, our results showed that lymphocytes from lung cancer patients exposed to the tobacco-specific carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone [NNK] had considerably increased frequency of cytogenetic damage in presence of MTHFR 677, MTHFR 1298, and SHMT allelic variants. These findings support the notion that significant interactions may potentially modulate the lung cancer susceptibility and alter the overall the repair abilities of lung cancer patients when exposed to tobacco carcinogens such as NNK.


Subject(s)
Folic Acid/genetics , Folic Acid/metabolism , Lung Neoplasms/genetics , Lung Neoplasms/metabolism , Aged , Case-Control Studies , Female , Ferredoxin-NADP Reductase/genetics , Gene Regulatory Networks , Genetic Predisposition to Disease , Genomic Instability , Glycine Hydroxymethyltransferase/genetics , Glycine Hydroxymethyltransferase/metabolism , Humans , Linkage Disequilibrium , Lung Neoplasms/enzymology , Male , Metabolic Networks and Pathways/genetics , Methylenetetrahydrofolate Reductase (NADPH2)/genetics , Methylenetetrahydrofolate Reductase (NADPH2)/metabolism , Micronucleus Tests , Middle Aged , Odds Ratio , Phenotype , Polymorphism, Single Nucleotide , Regression Analysis , Tumor Cells, Cultured
13.
J Clin Lipidol ; 4(1): 46-52, 2010.
Article in English | MEDLINE | ID: mdl-21122626

ABSTRACT

OBJECTIVE: The objective of this study was to determine whether enrollment in a multidisciplinary secondary prevention lipid clinic (SPLC) for 3 or more years was associated with improved adherence to lipid guidelines as compared with usual care provided by cardiologists. METHODS: Patients with documented coronary artery disease (CAD), enrolled in a SPLC, and followed for at least 3 years were identified by the use of a computer database. The comparison group included patients with CAD who received usual care from a cardiologist during the same time period. The percentage of patients achieving low-density lipoprotein cholesterol (LDL-C) goals at enrollment and after at least 3 years of follow-up was determined for both groups. The average total cholesterol, LDL-C, high-density lipoprotein cholesterol (HDL-C), and triglycerides were determined after at least 3 years of follow-up for both groups. RESULTS: Patients enrolled in the SPLC reached the LDL-C goals more often than usual care cardiology patients (goal <100mg/dL: 81.9% vs. 72.8%, P < .001; optional goal <70 mg/dL: 41.9% vs. 28.6%, P < .001). The patients enrolled in the SPLC had lower average total cholesterol, triglycerides, and LDL-C and greater average HDL-C after 3 years. All the lipid parameters decreased for patients in usual cardiology care, but these changes were not statistically significant. CONCLUSIONS: This multidisciplinary secondary prevention lipid clinic achieved the LDL-C goals (<100mg/dL and optional goal <70 mg/dL) more often than usual cardiology care for patients with CAD after 3 years of lipid management.


Subject(s)
Cholesterol, LDL/blood , Coronary Disease/blood , Coronary Disease/therapy , Secondary Prevention/methods , Aged , Ambulatory Care Facilities , Cholesterol/blood , Cholesterol, HDL/blood , Cohort Studies , Female , Humans , Male , Middle Aged , Retrospective Studies , Triglycerides/blood
14.
J Clin Psychol Med Settings ; 17(4): 387-400, 2010 Dec.
Article in English | MEDLINE | ID: mdl-21110074

ABSTRACT

Physical illness may precipitate psychological distress among older adults. This study examines whether social support and self-efficacy moderate the associations between physical health and depression and anxiety. Predictions were tested in 222 individuals age 60 or older presenting for help with worry. Physical health was assessed through self-report (subjective) and physical diagnoses (objective). Objective physical health did not have a significant association with depression or anxiety. Worse subjective physical health was associated with increased somatic anxiety, but not with depression or worry. The relationship between subjective physical health and depressive symptoms was moderated by self-efficacy and social support. As predicted, when self-efficacy was low, physical health had its strongest negative association with depressive symptoms such that as physical health improved, depressive symptoms also improved. However, the moderation effect was not as expected for social support; at high levels of social support, worse physical health was associated with increased depressive affect.


Subject(s)
Anxiety Disorders/psychology , Depressive Disorder/psychology , Health Status , Self Efficacy , Social Support , Activities of Daily Living/psychology , Aged , Aging/psychology , Anxiety Disorders/epidemiology , Depressive Disorder/epidemiology , Female , Geriatric Assessment/methods , Geriatric Assessment/statistics & numerical data , Humans , Male , Psychiatric Status Rating Scales/statistics & numerical data , Psychometrics , Surveys and Questionnaires , Texas/epidemiology
15.
Cancer Causes Control ; 21(12): 2157-64, 2010 Dec.
Article in English | MEDLINE | ID: mdl-20809339

ABSTRACT

BACKGROUND: We investigated environmental and occupational exposures and smoking history (while controlling for demographics) in a population of Mexican-American lung cancer cases and controls from the Houston metropolitan area. METHODS: Data were collected between 1991 and 2005 as part of an on-going multi-racial/ethnic, lung cancer case-control study. Cases included 212 Mexican-American lung cancer cases from UT MD Anderson Cancer Center. Controls (n = 328) were recruited from Houston's largest multispecialty group practice and frequency matched to the cases by age (± 5 years), sex, and ethnicity. Environmental and occupational factors were analyzed and odds ratios and 95% confidence intervals were calculated using logistic regression. RESULTS: We detected elevated risks of lung cancer associated with pesticide exposure and found conventional and antimicrobial (e.g., sterilizers, disinfectants, antiseptics) pesticides were associated with an increased risk of lung cancer in Mexican-Americans (conventional pesticides and antimicrobial pesticides combined: OR = 1.80, 95% CI 1.13-2.86; conventional pesticides: OR = 2.05, 95% CI 1.23-2.39; antimicrobial pesticides: OR = 2.48, 95% CI 1.46-4.21). CONCLUSIONS: Although we found over a two-fold increased risk of lung cancer among Mexican-Americans for pesticides, we could not identify individual pesticides. Our findings are an important preliminary step in identifying factors that are specifically associated with lung cancer risk among Mexican Americans.


Subject(s)
Carcinoma/etiology , Environmental Exposure/adverse effects , Lung Neoplasms/etiology , Mexican Americans/statistics & numerical data , Occupational Exposure/adverse effects , Aged , Anti-Infective Agents/adverse effects , Carcinoma/epidemiology , Carcinoma/ethnology , Case-Control Studies , Female , Humans , Lung Neoplasms/epidemiology , Lung Neoplasms/ethnology , Male , Middle Aged , Pesticides/adverse effects , Risk Factors , Texas/epidemiology
16.
J Natl Cancer Inst ; 102(15): 1199-205, 2010 Aug 04.
Article in English | MEDLINE | ID: mdl-20554942

ABSTRACT

Genome-wide association studies of white persons with lung cancer have identified a region of extensive linkage disequilibrium on chromosome 15q25.1 that appears to be associated with both risk for lung cancer and smoking dependence. Because studying African American persons, who exhibit lower levels of linkage disequilibrium in this region, may identify additional loci that are associated with lung cancer, we genotyped 34 single-nucleotide polymorphisms (SNPs) in this region (including LOC123688, PSMA4, CHRNA5, CHRNA3, and CHRNB4 genes) in 467 African American patients with lung cancer and 388 frequency-matched African American control subjects. Associations of SNPs in LOC123688 (rs10519203; odds ratio [OR] = 1.60, 95% confidence interval [CI] = 1.25 to 2.05, P = .00016), CHRNA5 (rs2036527; OR = 1.67, 95% CI = 1.26 to 2.21, P = .00031), and CHRNA3 (rs1051730; OR = 1.81, 95% CI = 1.26 to 2.59, P = .00137) genes with lung cancer risk reached Bonferroni-corrected levels of statistical significance (all statistical tests were two-sided). Joint logistic regression analysis showed that rs684513 (OR = 0.47, 95% CI = 0.31 to 0.71, P = .0003) in CHRNA5 and rs8034191 (OR = 1.76, 95% CI = 1.23 to 2.52, P = .002) in LOC123688 were also associated with risk. The functional A variant of rs1696698 in CHRNA5 had the strongest association with lung cancer (OR = 1.98, 95% CI = 1.25 to 3.11, P = .003). These SNPs were primarily associated with increased risk for lung adenocarcinoma histology and were only weakly associated with smoking phenotypes. Thus, among African American persons, multiple loci in the region of chromosome 15q25.1 appear to be strongly associated with lung cancer risk.


Subject(s)
Black or African American/statistics & numerical data , Chromosomes, Human, Pair 15 , Lung Neoplasms/epidemiology , Lung Neoplasms/genetics , Polymorphism, Single Nucleotide , Receptors, Nicotinic/genetics , Adenocarcinoma/epidemiology , Adenocarcinoma/genetics , Adult , Aged , Case-Control Studies , Female , Genetic Predisposition to Disease , Humans , Logistic Models , Lung Neoplasms/etiology , Male , Middle Aged , Nerve Tissue Proteins/genetics , Proteasome Endopeptidase Complex/genetics , Risk Factors , Smoking/adverse effects , Texas/epidemiology
17.
Health Psychol ; 29(3): 262-73, 2010 May.
Article in English | MEDLINE | ID: mdl-20496980

ABSTRACT

OBJECTIVE: Although there has been a socioeconomic gradient in smoking prevalence, cessation, and disease burden for decades, these disparities have become even more pronounced over time. The aim of the current study was to develop and test a conceptual model of the mechanisms linking socioeconomic status (SES) to smoking cessation. DESIGN: The conceptual model was evaluated using a latent variable modeling approach in a sample of 424 smokers seeking treatment (34% African American; 33% Latino; 33% White). Hypothesized mechanisms included social support, neighborhood disadvantage, negative affect/stress, agency, and craving. MAIN OUTCOME MEASURE: The primary outcome was Week 4 smoking status. RESULTS: As was hypothesized, SES had significant direct and indirect effects on cessation. Specifically, neighborhood disadvantage, social support, negative affect/stress, and agency mediated the relation between SES and smoking cessation. A multiple group analysis indicated that the model was a good fit across racial/ethnic groups. CONCLUSION: The present study yielded one of the more comprehensive models illuminating the specific mechanisms that link SES and smoking cessation. Policy, community, and individual-level interventions that target low SES smokers and address the specific pathways identified in the current model could potentially attenuate the impact of SES on cessation.


Subject(s)
Affect , Smoking Cessation/economics , Smoking Cessation/psychology , Smoking/psychology , Adult , Female , Health Behavior , Humans , Male , Middle Aged , Models, Theoretical , Social Environment , Social Support , Socioeconomic Factors , Young Adult
18.
Cancer Prev Res (Phila) ; 3(4): 505-17, 2010 Apr.
Article in English | MEDLINE | ID: mdl-20354165

ABSTRACT

We evaluated the association between energy balance and risk of bladder cancer and assessed the joint effects of genetic variants in the mammalian target of rapamycin (mTOR) pathway genes with energy balance. The study included 803 Caucasian bladder cancer patients and 803 healthy Caucasian controls matched to cases by age (+/-5 years) and gender. High energy intake [odds ratio, 1.60; 95% confidence interval (95% CI), 1.23-2.09] and low physical activity (odds ratio, 2.82; 95% CI, 2.10-3.79) were each associated with significantly increased risk of bladder cancer with dose-response pattern (P(trend) < 0.001). However, obesity (body mass index, > or =30) was not associated with the risk. Among 222 single nucleotide polymorphisms, 28 single nucleotide polymorphisms located in six genes of mTOR pathway were significantly associated with the risk. Further, the risk associated with high energy intake and low physical activity was only observed among subjects carrying a high number of unfavorable genotypes in the pathway. Moreover, when physical activity, energy intake, and genetic variants were analyzed jointly, the study population was clearly stratified into a range of low- to high-risk subgroups as defined energy balance status. Compared with subjects within the most favorable energy balance category (low energy intake, intensive physical activity, low number of unfavorable genotypes), subjects in the worst energy balance category (high energy intake, low physical activity, and carrying > or =7 unfavorable genotypes) had 21.93-fold increased risk (95% CI, 6.7-71.77). Our results provide the first strong evidence that physical activity, energy intake, and genetic variants in the mTOR pathway jointly influence bladder cancer susceptibility and that these results have implications for bladder cancer prevention.


Subject(s)
Energy Metabolism/genetics , Genetic Predisposition to Disease , Intracellular Signaling Peptides and Proteins/genetics , Protein Serine-Threonine Kinases/genetics , Signal Transduction/genetics , Urinary Bladder Neoplasms/genetics , Aged , Case-Control Studies , Energy Intake/physiology , Exercise/physiology , Female , Genotype , Humans , Male , Middle Aged , Phosphatidylinositol 3-Kinases/genetics , Phosphatidylinositol 3-Kinases/metabolism , Polymorphism, Single Nucleotide , Proto-Oncogene Proteins c-akt/genetics , Proto-Oncogene Proteins c-akt/metabolism , Risk Factors , TOR Serine-Threonine Kinases , Urinary Bladder Neoplasms/metabolism
19.
Am J Manag Care ; 16(3): 209-16, 2010 Mar.
Article in English | MEDLINE | ID: mdl-20225916

ABSTRACT

OBJECTIVE: To evaluate the effect of several strategies to increase influenza immunization in a multispecialty clinic. STUDY DESIGN: Retrospective electronic database analysis of influenza vaccinations in a 6-year period at Kelsey-Seybold Clinic in Houston, Texas. METHODS: We evaluated immunization rates in pregnant women and healthcare workers during 6 influenza seasons (2003-2004 to 2008-2009) after implementing the following strategies for pregnant women: assessing baseline immunization rates for obstetric providers, followed by direct encouragement and behavior modeling; implementing standing orders for influenza vaccination in pregnancy; and offering vaccination training to obstetricians and nurses. Further strategies implemented for healthcare workers included the following: conducting an employee survey about influenza knowledge, providing employee education based on survey findings and Centers for Disease Control and Prevention recommendations, making employee vaccines readily available and free of charge, designating immunization nurses to serve as clinical champions, monitoring and reporting the employee influenza vaccination rate, and recognizing the clinic with the highest employee vaccination rate. RESULTS: Influenza vaccination coverage rates in pregnant women increased from 2.5% at baseline to 37.4% in 2008-2009. Employee influenza vaccination coverage rates increased from 36.0% in 2003-2004 to 64.0% in 2008-2009. CONCLUSION: Low influenza vaccination rates in pregnant women and healthcare workers can be substantially improved using methods shown to be effective in other clinical settings.


Subject(s)
Health Personnel/statistics & numerical data , Influenza Vaccines/administration & dosage , Influenza, Human/prevention & control , Pregnancy Complications, Infectious/prevention & control , Prenatal Care , Attitude of Health Personnel , Female , Health Knowledge, Attitudes, Practice , Humans , Immunization Programs/statistics & numerical data , Influenza, Human/drug therapy , Influenza, Human/epidemiology , Male , Pregnancy , Pregnancy Complications, Infectious/virology , Program Evaluation , Retrospective Studies , Texas/epidemiology
20.
Am J Public Health ; 100(4): 702-6, 2010 Apr.
Article in English | MEDLINE | ID: mdl-20167886

ABSTRACT

OBJECTIVES: We evaluated the influence of financial strain on smoking cessation among Latino, African American, and Caucasian smokers of predominantly low socioeconomic status. METHODS: Smokers enrolled in a smoking cessation study (N = 424) were followed from 1 week prequit through 26 weeks postquit. We conducted a logistic regression analysis to evaluate the association between baseline financial strain and smoking abstinence at 26 weeks postquit after control for age, gender, race/ethnicity, educational level, annual household income, marital status, number of cigarettes smoked per day, and time to first cigarette of the day. RESULTS: Greater financial strain at baseline was significantly associated with reduced odds of abstinence at 26 weeks postquit among those who completed the study (odds ratio [OR] = 0.77; 95% confidence interval [CI] = 0.62, 0.94; P = .01). There was a significant association as well in analyses that included those who completed the study in addition to those lost to follow-up who were categorized as smokers (OR = 0.78; 95% CI = 0.64, 0.96; P = .02). CONCLUSIONS: Greater financial strain predicted lower cessation rates among racially/ethnically diverse smokers. Our findings highlight the impact of economic concerns on smoking cessation and the need to address financial strain in smoking cessation interventions.


Subject(s)
Costs and Cost Analysis/economics , Ethnicity/statistics & numerical data , Racial Groups/statistics & numerical data , Smoking Cessation/economics , Adult , Black or African American/statistics & numerical data , Age Factors , Aged , Confidence Intervals , Educational Status , Female , Hispanic or Latino/statistics & numerical data , Humans , Income , Logistic Models , Longitudinal Studies , Male , Marital Status , Middle Aged , Odds Ratio , Poverty/statistics & numerical data , Sex Factors , Socioeconomic Factors , United States , Young Adult
SELECTION OF CITATIONS
SEARCH DETAIL
...