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Biomedical subjects

A Hyland

Publications and source records attributed to A Hyland.

At least 37 records · Page 2Linked to original sources
PubMed2003

Review of the quality of studies on the economic effects of smoke-free policies on the hospitality industry.

OBJECTIVE: To compare the quality and funding source of studies concluding a negative economic impact of smoke-free policies in the hospitality industry to studies concluding no such negative impact. DATA SOURCES: Researchers sought all studies produced before 31 August 2002. Articles published in scientific journals were located with Medline, Science Citation Index, Social Sciences Citation Index, Current Contents, PsychInfo, Econlit, and Healthstar. Unpublished studies were located from tobacco company websites and through internet searches. STUDY SELECTION: 97 studies that made statements about economic impact were included. 93% of the studies located met the selection criteria as determined by consensus between multiple reviewers. DATA EXTRACTION: Findings and characteristics of studies (apart from funding source) were classified independently by two researchers. A third assessor blind to both the objective of the present study and to funding source also classified each study. DATA SYNTHESIS: In studies concluding a negative impact, the odds of using a subjective outcome measure was 4.0 times (95% confidence interval (CI) 1.4 to 9.6; p = 0.007) and the odds of not being peer reviewed was 20 times (95% CI 2.6 to 166.7; p = 0.004) that of studies concluding no such negative impact. All of the studies concluding a negative impact were supported by the tobacco industry. 94% of the tobacco industry supported studies concluded a negative economic impact compared to none of the non-industry supported studies. CONCLUSION: All of the best designed studies report no impact or a positive impact of smoke-free restaurant and bar laws on sales or employment. Policymakers can act to protect workers and patrons from the toxins in secondhand smoke confident in rejecting industry claims that there will be an adverse economic impact.

Commerce↗
PubMed2002

Mentholated cigarettes and smoking cessation: findings from COMMIT. Community Intervention Trial for Smoking Cessation.

OBJECTIVE: To examine the association between the use of menthol cigarettes and smoking cessation, amount smoked, and time to first cigarette in the morning. BACKGROUND: The majority of African American smokers smoke mentholated cigarettes. Some evidence suggests that African Americans may be more nicotine dependent than whites. One theory is that menthol in cigarettes is responsible for enhancing the dependence producing capacity of cigarettes; however, few studies have prospectively examined the association between menthol use and indicators of nicotine dependence. METHODS: Baseline smokers from the Community Intervention Trial for Smoking Cessation (COMMIT) completed a telephone tobacco use survey in 1988 and were re-interviewed in 1993. Use of mentholated cigarettes was assessed by self report at baseline. Indicators of dependence examined were six month cessation in 1993, amount smoked among continuing smokers in 1993, and time to first cigarette in the morning in 1988. Multivariate regression techniques were used to assess the association of baseline menthol use with these outcomes while controlling for other factors related to dependence. RESULTS: Overall, 24% of the sample smoked a mentholated brand in 1988. No consistent associations were observed for menthol use and indicators of dependence in both overall and race specific analyses. Factors significantly associated with increased menthol use were female sex, age 25-34 years, African American and Asian race/ethnicity, greater education, greater than 60 minutes to the first cigarette in the morning, two or more past quit attempts, and use of premium brand cigarettes. Canadian respondents and those who smoked 15-24 cigarettes per day had lower rates of menthol use. Use of mentholated cigarettes was not associated with quitting, amount smoked, or time to first cigarette in the morning. CONCLUSION: Future work is needed to clarify the physiological and sociocultural mechanisms involved in mentholated cigarette smoking.

Adolescent↗
PubMed2002

Tobacco Institute lobbying at the state and local levels of government in the 1990s.

OBJECTIVE: To describe variation in Tobacco Institute (TI) lobbying expenditures across states and test whether these expenditures vary in relationship to measures of tobacco control activity at the state level. INDEPENDENT VARIABLE: Data for this study came from the TI's State Activities Division (SAD) annual budgets for the years 1991-97, excluding 1993. These data include budgetary information pertaining to state and local lobbying activity and special projects reported by state. DEPENDENT VARIABLES: The following measures of state tobacco control activity during the period 1991 to 1997 were considered: (1) American Stop Smoking Intervention Study (ASSIST) funding; (2) voter initiatives to raise cigarette taxes; (3) cigarette excise tax level; (4) workplace smoking restrictions; (5) the intensification of smoke-free air laws covering private worksites, government worksites, and restaurants; (6) the intensification of strength of sales to minors laws; (7) the intensification of strength of laws that punish minors for possessing, purchasing, and/or using cigarettes; (8) state status as a major grower of tobacco; (9) partisan control of state government, 1996; and (10) an overall composite index reflecting a state's strength of tobacco control, combining cigarette prices with workplace and home smoking bans. RESULTS: The overall annual budget for the TI declined steadily during the 1990s, from $47.7 million in 1991 to $28.1 million by 1996. The proportion of the TI's budget allocated to the SAD remained relatively stable at about 30%. TI expenditures for lobbyists were highest in California where tobacco control activity has been strong for the past decade. We found significant associations between TI SAD expenditures and cigarette excise tax levels, the status of a state as a recipient of federal ASSIST funds, and changes in the strength of statewide laws that penalise minors for possessing, purchasing, and/or using cigarettes. We found little or no association between state and local lobbying budgets of the TI and changes in statewide smoke-free air laws, although we did find evidence of TI special project expenditures earmarked to specific states and localities to resist clean indoor air legislation/regulations (that is, Maryland and New York City). We found no significant correlation between TI lobbying expenditures and sales to minors' laws, status as a major producer of tobacco, or partisan control of state government. CONCLUSIONS: The findings from this study support the hypothesis that in the 1990s tobacco control activities such as raising cigarette excise taxes and participation in ASSIST attracted TI resources to undermine these efforts.

Adolescent↗
PubMed2002

Failed promises of the cigarette industry and its effect on consumer misperceptions about the health risks of smoking.

BACKGROUND: In January 1954, US tobacco manufacturers jointly sponsored an advocacy advertisement entitled "A Frank Statement to Cigarette Smokers" which appeared in 448 newspapers in 258 cities reaching an estimated 43 245 000 Americans. The advertisement questioned research findings implicating smoking as a cause of cancer, promised consumers that their cigarettes were safe, and pledged to support impartial research to investigate allegations that smoking was harmful to human health. OBJECTIVE: To examine (1) the extent to which cigarette companies fulfilled the promises made to consumers in the 1954 "Frank Statement", and (2) the effect of these promises on consumer knowledge, beliefs, and smoking practices. METHODS: This study reviews statements made since 1954 by the tobacco companies individually and collectively through the Tobacco Institute and Tobacco Industry Research Committee/Council for Tobacco Research on the subject of smoking as a cause disease, and the industry's pledge to support and disclose the results of impartial research on smoking and health. Many of the industry documents evaluated in this study were obtained from a collection consisting of 116 documents entitled the "Statement of Defendants' Misrepresentations" prepared by attorneys representing the state of Connecticut in the Medicaid litigation against the tobacco industry in 1998. In addition, we searched for corroborating material from tobacco industry documents collected from the tobacco industry's document websites. In order to contrast industry statements on smoking and health with what smokers' actually believed about smoking we reviewed reports of public polling data on smokers' knowledge and beliefs about smoking and disease gathered from tobacco industry sources and from surveys conducted by public health researchers. RESULTS: Analysis of public statements issued by the tobacco industry sources over the past five decades shows that the companies maintained the stance that smoking had not been proven to be injurious to health through 1999. The public statements of the tobacco industry are in sharp contrast to the private views expressed by many of their own scientists. The tobacco documents reveal that many scientists within the tobacco industry acknowledged as early as the 1950s that cigarette smoking was unsafe. The sincerity of the industry's promise to support research to find out if smoking was harmful to health and to disclose information about the health effects of smoking can also be questioned based upon the industry's own documents which reveal: (1) scepticism about the scientific value of the smoking and health research program established by the industry; and (2) evidence that research findings implicating smoking as a health problem were often not published or disclosed outside the industry. Industry documents also show that the companies knew that their own customers were misinformed about smoking and health issues. CONCLUSION: It is clear that the cigarette companies failed to fulfill the promises made to consumers in the 1954 "Frank Statement" advertisement. The failure of cigarette manufacturers to honour these promises has resulted in a public that even today remains misinformed about the health risks of smoking.

Consumer Product Safety↗
PubMed2001

MCM2 is an independent predictor of survival in patients with non-small-cell lung cancer.

PURPOSE: Minichromosome maintenance protein 2 (MCM2) is a component of the prereplicative complex. It is essential for eukaryotic DNA replication and is only expressed in proliferating cells. The prognostic utility of MCM2 compared with Ki-67, another marker of proliferating cells, on survival of patients with non-small-cell lung cancer (NSCLC) was studied. PATIENTS AND METHODS: We examined the immunohistochemical expression of MCM2 and Ki-67 in primary pathologic tumor specimens from 221 NSCLC patients. For each marker, the fraction of tumor cells with positive staining was assessed as a percentage and categorized into four groups: 0% to 24%, 25% to 49%, 50% to 74%, and > or = 75%. MCM2 and Ki-67 immunoreactivities were compared with each other, and associations with pathologic and clinical parameters predictive of survival were analyzed with the chi(2) test. Cox regression models were used to assess associations between MCM2 and Ki-67 and survival while controlling for confounders. RESULTS: Independent variables significantly associated with survival were tumor stage, performance status, and staining category. Patients with less than 25% MCM2 immunoreactivity had a longer median survival time than patients with > or = 25% MCM2 immunoreactivity (46 v 31 months; P =.039) and a lower relative risk (RR) of death (RR, 0.55, 95% confidence interval, 0.34 to 0.88). There was no significant association between survival and Ki-67 expression. CONCLUSION: Immunostaining of tumor cells for MCM2 is an independent prognostic parameter of survival for patients with NSCLC. Interpretable results can be obtained on more than 96% of paraffin-embedded specimens, and approximately 35% will be in the favorable subgroup, with less than 25% positively stained tumor cells. Whether MCM2 is predictive of response to therapy needs to be studied.

Adenocarcinoma↗
PubMed2001

MCM2--a promising marker for premalignant lesions of the lung: a cohort study.

BACKGROUND: Because cells progressing to cancer must proliferate, marker proteins specific to proliferating cells may permit detection of premalignant lesions. Here we compared the sensitivities of a classic proliferation marker, Ki-67, with a new proliferation marker, MCM2, in 41 bronchial biopsy specimens representing normal mucosa, metaplasia, dysplasia, and carcinoma in situ. METHODS: Parallel sections were stained with antibodies against MCM2 and Ki-67, and the frequencies of staining were independently measured by two investigators. Differences were evaluated statistically using the two-sided correlated samples t-test and Wilcoxon rank sum test. RESULTS: For each of the 41 specimens, the average frequency of staining by anti-MCM2 (39%) was significantly (p < 0.001) greater than by anti-Ki-67 (16%). In metaplastic lesions anti-MCM2 frequently detected cells near the epithelial surface, while anti-Ki-67 did not. CONCLUSIONS: We conclude that MCM2 is detectable in 2-3 times more proliferating premalignant lung cells than is Ki-67. The promise of MCM2 as a sensitive marker for premalignant lung cells is enhanced by the fact that it is present in cells at the surface of metaplastic lung lesions, which are more likely to be exfoliated into sputum. Future studies will determine if use of anti-MCM2 makes possible sufficiently early detection to significantly enhance lung cancer survival rates.

Biomarkers, Tumor↗
PubMed2001

Downregulation of gelsolin correlates with the progression to breast carcinoma.

The actin cytoskeleton underlies several normal cellular functions and is deranged during carcinogenesis. Gelsolin, a multifunctional actin-binding protein, is downregulated in several types of tumors and its abnormal expression is one of the most common defects noted in invasive breast carcinoma (ICA). This study utilizes immunohistochemistry to examine the expression of gelsolin in 95 ICA, 59 ductal carcinoma in situ (DCIS) and 36 benign lesions, including 17 atypical ductal hyperplasia (ADH). Cytoplasmic staining was scored as positive, reduced or negative. Gelsolin expression was then correlated with patient's age, tumor size, histologic grade and lymph node status. All unremarkable breast biopsies, 88% of ADH, 44% of DCIS and 28% of ICA were positive for gelsolin. This represents a significant difference among the groups (p = < 0.0001) and the trend towards reduced gelsolin with the progression to ICA is significantly linear (p = < 0.0001). For invasive carcinoma, patients older than 44 years were significantly more likely to have decreased expression of gelsolin than patients 44 years old and younger (p = 0.007). Bivariate analysis showed no correlation of gelsolin expression with lymph node status (p = 0.62), tumor size (p = 0.10), histologic grade (p = 0.42), estrogen receptor status (p = 1.0) or other clinicopathologic parameters. In clinical follow-up, there were 18 breast tumor related deaths within a median follow-up time of 4.2 years. Survival analysis indicated that the level of gelsolin expression may be associated with survival (p = 0.06). In summary, the frequency of gelsolin deficiency increases significantly with progression from ADH to DCIS to ICA. Additionally, gelsolin expression may be an independent marker of prognosis.

Adult↗
PubMed2000

Increasing taxes as a strategy to reduce cigarette use and deaths: results of a simulation model.

OBJECTIVES: The aim of this study was to develop a simulation model to predict the effects of taxes on the smoking rate and smoking-attributable deaths. METHODS: The model projects the number of smokers and smoking-related deaths from a baseline year forward. The effects of taxes of different sizes, indexed and unindexed, and temporary vs sustained are modeled. RESULTS: The model predicts that sustained tax increases have the potential to substantially reduce the number of smokers and the number of premature deaths, with the effects growing over time. Indexing taxes to inflation stems erosion of the tax effect. CONCLUSIONS: Tax hikes have the ability to substantially affect smoking rates in the near term. These effects grow over time and lead to substantial savings in lives and health care costs.

Adolescent↗
PubMed2000

The impact of untruthful age reporting during tobacco compliance checks.

A pilot study consisting of 76 compliance checks was conducted in October 1998 in Chautauqua County, New York, by a 15-year-old white female. Half of the merchants were randomized to be checked under a standard protocol whereby the minor was instructed to answer truthfully when asked about her age. The remaining stores were checked under a new protocol that permitted the minor to state that she was 18 years old if asked about her age. It was found that untruthful age reporting during compliance checks has little impact on the overall compliance rate.

Adolescent↗
PubMed2000

Second malignant neoplasms after treatment for Hodgkin's disease in childhood or adolescence.

PURPOSE: To determine the frequency of and risk factors for second malignant neoplasms (SMNs) after treatment for Hodgkin's disease diagnosed in children and adolescents. PATIENTS AND METHODS: One hundred eighty-two consecutive, previously untreated patients with Hodgkin's disease who were younger than 20 years of age at diagnosis and who were referred to Roswell Park Cancer Institute (Buffalo, NY) for treatment between January 1, 1960, and December 31, 1989, were studied. Sex-specific standardized incidence ratios (SIRs) were calculated. Kaplan-Meier survival estimates and Cox regression analyses were performed to determine the relationship of several demographic and treatment variables to SMN incidence. RESULTS: Twenty-eight patients developed an SMN at a mean of 14.93 +/- 8.09 years (range, 2.65 to 29.88 years) after diagnosis of Hodgkin's disease. The cumulative percentage of patients who developed an SMN was 26.27 +/- 6.75% at 30 years after diagnosis. The SIR was 9.39 (95% confidence interval [CI], 4.05 to 18.49) for male patients and 10.16 (95% CI, 5.56 to 17.05) for female patients. The most frequent SMNs were thyroid cancer, breast cancer, nonmelanoma skin cancer, non-Hodgkin's lymphoma, and acute leukemia. Multivariate analysis of sex, treatment with any alkylating agent, treatment with doxorubicin, splenectomy, and relapse (as a time-dependent covariate) with time to SMN onset gave nonsignificant results. CONCLUSION: Successfully treated children and adolescents with Hodgkin's disease have a substantial risk for the occurrence of subsequent neoplasms. The most frequent SMNs (skin, thyroid, and breast) are readily detected by physical examination and available screening procedures.

Adolescent↗
PubMed2000

A simulation of the effects of youth initiation policies on overall cigarette use.

OBJECTIVES: We developed a simulation model to predict the effects of policies aimed at reducing smoking initiation by youths younger than 18 years. METHODS: The model projected the number of smokers, never smokers, and ex-smokers by age, sex, and racial/ethnic group and the effects of reductions in youth initiation. RESULTS: The model predicted that even if tobacco policies eliminated youth initiation, the number of smokers would not be halved for more than 30 years. If initiation were halved and some of the initiation were delayed rather than eliminated, substantially smaller reductions would result. CONCLUSIONS: Policies that increase cessation rates are needed to reduce the number of current smokers and the more near-term health problems.

Adolescent↗
PubMed2000

Consumer perception of risk associated with filters contaminated with glass fibers.

The filters in Eclipse, a new cigarette-like smoking article marketed by R. J. Reynolds Tobacco Company, are contaminated with glass fibers, fragments, and particles. Reported herein are the results of a study in which consumers were questioned about their opinions as to whether exposure to glass fibers in such a filter poses an added health risk beyond that from smoking and whether the manufacturer has an obligation to inform consumers about the glass contamination problem. The study queried 137 adults who were interviewed while waiting at a Division of Motor Vehicles office in Erie County, New York in 1997. All but one person expressed the view that the presence of glass fibers on the filters poses an added health risk beyond that associated with exposure to tobacco smoke alone. Nearly all expressed the position that the cigarette manufacturer has a duty to inform the public about the potential for glass exposure.

Adult↗
PubMed1999

Ability of smokers to reduce their smoking and its association with future smoking cessation.

AIMS: We examined whether cigarette smokers in the United States can significantly reduce their smoking and maintain this reduction and, if so, whether this predicts an increase or decrease in the probability of smoking cessation in the future. DESIGN: Longitudinal observation study. SETTING: The 22 US cities of the Community Intervention Trial for smoking cessation (COMMIT). PARTICIPANTS: The 1410 subjects who smoked at both baseline and at 2-year follow-up. INTERVENTION: Public health efforts to prompt cessation in half the communities. MEASUREMENTS: Self-reported cigarettes/day and abstinence at baseline, 2-year and 4-year follow-ups. FINDINGS: At 2-year follow-up, 60% of the subjects had either not changed or increased their smoking, 17% had decreased their smoking by 5-25%, 15% by 24-49% and 8% by > or = 50%. Among the 40% who had reduced > or = 5% at 2-year follow-up, 52% reported maintaining that reduction at 4-year follow-up. Reduction in smoking at year 2 did not prospectively predict an increase or decrease in the probability of making a quit attempt; nor did it predict eventually quitting by year 4. CONCLUSIONS: A substantial minority of US smokers are able to reduce their smoking and maintain this for long periods of time. Smoking reduction neither promotes nor undermines cessation.

Adult↗