By H. Brant. International Fine Arts College. 2019.
However fluticasone 100mcg asthma symptoms eyes, as discussed above buy fluticasone 500mcg with mastercard asthma treatment ventolin, if the sample size is large enough proven 250 mcg fluticasone asthma treatment jamaica, even a very small effect size may be statistically signiﬁcant but not clinically important buy generic fluticasone 250 mcg on-line asthma symptoms severe. Effect of level of signiﬁcance on power The magnitude of the level of signiﬁcance, α, tells the reader how willing the researchers are to have a result that occurred only by chance. If α is large, the study will have more power to ﬁnd a statistically signiﬁcant difference between 134 Essential Evidence-Based Medicine δ 1 δ 2 P > 0. The results of the group on the left with a small effect size are not statistically signiﬁcantly different (p > 0. The ones on the right with a larger effect size have a result that is statistically signiﬁcant (p < 0. If α is very small, researchers are willing to accept only a tiny likelihood that the effect size found occurred by chance alone. In general, as the level of α increases, we are willing to have a greater likelihood that the effect size occurred by chance alone (Fig. We are more likely to ﬁnd the difference to be sta- tistically signiﬁcant if the level of α is larger rather than smaller. In thecaseontheleftthereisa large standard deviation, while Effect of standard deviation on power on the right there is a small standard deviation. The situation The smaller the standard deviation of the data-sets, the better the power of the on the right will be statistically study. If two samples each have small standard deviations, a statistical test is signiﬁcant (p < 0. When the two normal distributions are compared, the one with the smallest spread will have the most likelihood of being found statistically signiﬁcant (Fig. This is important because a negative result may not be due to the lack of an important effect, but simply because of the inability to detect that effect statistically. From an interpretation perspective, the question one asks is, “For a given β level and a difference that I consider clinically important, did the researcher use a large enough sample size? The three common ways of doing this are through the interpretation of the conﬁdence intervals, by 136 Essential Evidence-Based Medicine using sample size nomograms, and with published power tables. We will discuss the ﬁrst two methods since they can be done most simply without specialized references. For the difference between two groups, it gives the range of the most likely difference between the two groups under consideration. This suggests that a larger study could ﬁnd a difference that was statisti- cally signiﬁcant, although maybe not as large as 25mm. If there were no other evidence available, it might be rea- sonable to use the better drug until either a more powerful study or a well-done meta-analysis showed a clear-cut superiority of one treatment over the other, or showed equivalence of the two drugs. In this case, consider the study to be negative, at least until another and much larger study comes along. Evaluating negative studies using a nomogram There are two ways to analyze the results of a negative study using published nomograms from an article by Young and others. Either method will show, for a study with suf- ﬁcient power, what sample size was necessary or what effect size could be found to produce statistical signiﬁcance. In the ﬁrst method, use the nomogram to determine the effect size that the sample size of the study had the power to ﬁnd. If the effect size that could potentially have been found with this sample size was larger than the effect size that a clinician or patient would consider clinically important, accept the study as negative. In other words, in this study, the clinically important difference could have been found and was not. On the other hand, if the clinically important effect size could not have been found with the sample size that was enrolled, the study was too small. The second way of analyzing a negative study is to determine the sample size needed to get a clinically important effect size. Use the nomograms starting from the effect size that one considers clinically important and determine the sample size that would be needed to ﬁnd this effect size. This clinically important effect size will most likely be larger than the actual difference found in the study. If the actual sample size is greater than the sample size required to ﬁnd a clinically important difference, accept the results as negative. The study didn’t have the power to ﬁnd a difference that is clinically important (Fig. There are some caveats which must be considered in using this method to evaluate negative studies. If the needed sample size is huge, it is unlikely that a group that large can ever be studied, so accept the results as a negative study. If the needed sample size is within about one order of magnitude greater than the actual sample size, wait for the bigger study to come along before using the information. Using a nomogram for dichotomous variables Dichotomous variables are those for which there are only two possible values (e. Using a nomogram for continuous variables Continuous variables are those for which multiple possible values can exist and which have proportional intervals. If a study found a 20% relative risk reduction and there was a 60% 500 response rate in the control group (vertical line), you would ﬁnd this effect size statistically Percentage signiﬁcant only if there was a α = 0. Sample size nomograms for interpreting negative clinical Actual effect size studies. Non-inferiority studies and equivalence studies Sometimes a goal of a research study can be to determine that the experi- mental treatment is no worse than the standard treatment or placebo. In that case, an approach has been suggested that only seeks to show non-inferiority of the experimental therapy to the comparison. In these studies, the alternative hypothesis is that the experimental therapy is inferior to the standard therapy. This comes from a null hyopothesis that states that the experimental treatment is equal to or better than the placebo or control treatment. In order for this study to be done, there must have been previous research studies showing that when compared to standard therapy or placebo, there is either no difference or the results were not statistically signiﬁcant. It is also possible that there was a dif- ference but the studies were of very poor quality, possibly lacking correct ran- domization and blinding so that the majority of physicians would not accept the results. It is important for the reader to recognize that what the authors are essentially saying is that they are willing to do a one-tailed test for showing that the treat- ment is equal to or better than the control or placebo group. This leads to a value of P for statistical signiﬁcance on one tail that should be less than 0. In other words, they will most likely ﬁnd that there is no difference in the groups when in fact there is a difference. Non-inferiority studies are most often seen in drug studies used by manufacturers to demonstrate that a new drug is at least as good as the standard drugs that are available. Of course, common sense would dictate that if a new drug is more expensive than a standard one and if it does not have a track record of safety, there ought to be no reason to use the new drug simply because it is not inferior. Robert Frost (1874–1963): The Exposed Nest Learning objectives In this chapter you will learn: r the basic concept and measures of risk r the meanings, calculations, uses, and limitations of: r absolute risk r relative risk r odds ratios r attributable risk and number needed to harm r attributable risk percent r the use of conﬁdence intervals in risk r how to interpret the concept of “zero risk” Risk is present in all human activities. What is the risk of getting breast cancer if a woman lives on Long Island and is exposed to organochlorines? What is the risk of getting lung cancer because there is a smoke residue on a co-worker’s sweater? Some of these risks are real and others are, at best, minimally increased risks of modern life. Risks may be those associated with a disease, with therapy, or with common environmental factors. Physicians must be able to interpret levels of risk for better care of their patients.
National Drug Strategy 2016-2025 27 Best practice approaches to addressing the needs of young people include: • Regulation of alcohol and tobacco retailers • Zero blood alcohol concentration requirements on novice drivers • Family interventions • Tailored services • Connections to services • School programs and curriculum • Restrictions on access • Price • Promotional restrictions • Tailored public education 6 discount 100 mcg fluticasone mastercard asthma lung sounds. Older people can be more susceptible to the harms arising from alcohol discount fluticasone 100 mcg asthma lifestyle changes, tobacco and other drug use as a result of pain and medication management trusted fluticasone 100mcg symptoms asthma attack 3 year old, isolation order fluticasone 250mcg without prescription asthma symptoms diary, poor health, grief/loss/life events and loss of independent living. Best practice approaches to addressing the needs of older people include: • Early identification of issues in primary care settings • Maintenance of social connections • Promotion of community inclusion, positive environments and full and active lives • Age appropriate treatment components • Longer treatments • Physically accessible services (hand rails, appropriate seating, transport etc) • Outreach and home visits • Workforce development to enable care for more complex co-morbidities. In 2012 half of all prison entrants reported using cannabis prior to entering prison and more than one-third (37%) reported using methamphetamines. Between 50- 90% of people who inject drugs have spent time in prison and 34% continue to inject while 62 incarcerated. For those injecting drugs in prison, 90% report sharing needles/injecting equipment. Best practice approaches to addressing the needs of people in contact with the criminal justice system include: • Implement smoke-free policies in correctional facilities. National Drug Strategy 2016-2025 28 • Improve the capability, capacity and confidence of the workforce to work with people who have a range of complex needs • Access to education, health promotion, treatment and support services while in prison and during their transition back into the community • Provision of a range of treatments, including detoxification and withdrawal management, pharmacotherapy, drug free units or therapeutic communities • Testing, education and treatment for blood borne viruses • Restorative justice conferencing • Strengthen existing harm reduction efforts in prison settings, such as opioid substitution therapy, and to support inmates to adopt safe behaviours and assist inmates connect with health and social services post-release • Aftercare and support post release • Drug detection units and searching of offenders, staff, visitors, vehicles. For example, some members of new migrant populations from countries where alcohol is not commonly used may be at greater risk when they come into contact with Australia’s more liberal drinking culture. Some types of drugs specific to cultural groups, such as kava and khat, can also contribute to problems in the Australian setting and some individuals may have experienced torture, trauma, grief and loss, making them vulnerable to harmful use of drugs. In 2013, use of licit and illicit drugs was more common in people who identified as homosexual or bisexual in Australia than for those 68 identifying as heterosexual. However, priority drug types change over time and differ due to local circumstances. In addition to these priority drug types, jurisdictions should be aware of emerging trends or drugs with concentrated use in specific communities. These include image enhancing drugs (steroids) and volatiles (fuel, paint and aerosols). Poly-drug use is also a significant concern and strategies that address this can be very effective at reducing harm. Tobacco smoking also carries the highest burden of drug-related costs on the Australian 73 community. Australia’s implementation of a range of multifaceted tobacco control measures has been effective in reducing smoking rates over recent decades, with daily smoking for those aged 14 years or older declining in Australia from 24. Smokers are also having fewer cigarettes 74 per week (96 in 2013 compared to 111 in 2010). Challenges remain for tobacco, including addressing the inequality in smoking rates between some disadvantaged populations and the broader community. In addition, it is important to maintain low smoking rates and expand smoke-free areas to protect people from second hand smoke. Responding to the introduction of e-cigarettes is also a matter currently faced by Australian jurisdictions. In 2010, the cost of alcohol-related harm (including harm to others) was reported to be $36 billion. Alcohol is also 77 associated with 3,000 deaths and 65,000 hospitalisations every year. The costs of tobacco, alcohol and illicit drug abuse to Australian society in 2004/05. National Drug Strategy 2016-2025 31 While the burden of alcohol harms in the community remains high, some gains have been made. The proportion of people aged 14 or older who consumed alcohol daily declined between 2004 (8. The proportion of people exceeding the lifetime risk guidelines has reduced from 20. In the 2013 National Drug Strategy Household Survey, respondents were asked if anyone under the influence of or affected by alcohol had perpetrated verbal abuse, physical abuse or put them in fear in the preceding 12 months. Research suggests that there were 90 ‘one-punch’ deaths in Australia between the years 80 2000 to 2012. Stimulants can be taken orally, smoked, snorted/inhaled and dissolved in water and injected. Some of the harms that can arise from the use of methamphetamines and other stimulants include mental illness, cognitive impairment, cardiovascular problems and 81 overdose. This figure has remained stable since 2007, but is lower 83 than the prevalence recorded between 1998 and 2004. However, among those who use amphetamine, the use of the powder form of the drug decreased significantly from 51% in 2010 to 29% in 2013, while the use of crystal-methamphetamine more than doubled since 2010 (from 22% to 50% in 2013) amongst methamphetamine users. There was also a significant increase in the proportion of users consuming methamphetamine daily or weekly (from 9% in 2010 to 16% in 2013). In addition, 16% of Australians identified methamphetamine as the illicit drug of most concern to the community (an increase from 10% in 2012). Violent behaviour is also more than six times as likely to occur among methamphetamine dependent people when they are using the drug, compared to 84 when they are not using the drug. As the most widely used of the illicit drugs in Australia, cannabis carries a significant burden of 87 disease. In particular, cannabis dependence among young adults is correlated with, and probably 88 contributes to, mental disorders such as psychosis. The harms that can arise as a result of the use of pharmaceutical drugs 90 depend on the drug used, but can include fatal and non-fatal overdose. Harms also include infection and blood vessel occlusion from problematic routes of administration, memory lapses, coordination impairments and aggression. There has been a significant increase in the misuse of pharmaceutical drugs in Australia. However, Australia has seen an increase in the prescription and use of licit opioids. In particular, the supply of 85 Ministerial Council on Drug Strategy (2006) National Cannabis Strategy 2006-2009, Commonwealth of Australia, Publications Approval No. Extent of illicit drug use, dependence, and their contribution to global burden of disease. Extent of illicit drug use, dependence, and their contribution to global burden of disease. National Drug Strategy 2016-2025 33 oxycodone and fentanyl increased 22 fold and 46-fold respectively between 1997 and 2012 and the number of prescriptions for opioid prescriptions subsidised by the Pharmaceutical Benefits Scheme 94 increased from 2. Consistent with these trends, hospital separations associated with prescription opioid poisoning have increased substantially while 95 those for heroin have decreased. While the effect of the drugs may be similar to other illicit drugs, their chemical structure is different and the effects are not always well known. One of the principal concerns with the use of new psychoactive substances is that the products, and their chemical compounds or makeup, are constantly evolving. There have also been a number of unexplained suicides associated with preceding use of synthetic cannabinoids (spice). Data around the use of new psychoactive substances in Australia obtained through the National Drug Strategy Household Survey indicate that in 2013, 1. These measures are taken from the Evaluation and Monitoring of the National Drug Strategy 2004- 97 2009 Final Report. The proposed measures use existing published data sources to help ensure continuity. The performance measures are high-level as data are not always comprehensive enough to provide robust national measures of activity and progress. It is not possible to directly match the objectives of the strategy, or each drug type, to a performance measure. Average age of uptake of drugs, by drug type Source: National Drug Strategy Household Survey, Australian Institute of Health and Welfare 2.
Resis- tant starch: The effect on postprandial glycemia discount fluticasone 500mcg mastercard asthma 5k walk, hormonal response cheap 100mcg fluticasone fast delivery asthmatic bronchitis relief, and satiety cheap 250 mcg fluticasone with mastercard asthma symptoms but not asthma. Effect of chitin and chitosan on nutrient digestibility and plasma lipid concentrations in broiler chickens fluticasone 100 mcg without prescription asthma grading. Hypolipidaemic, gastrointestinal and related responses of broiler chickens to chitosans of different viscosity. Broiler chicken body weights, feed intakes, plasma lipid and small-intestinal bile acid concentrations in response to feeding of chitosan and pectin. Overweight treated with energy restriction and a dietary fibre supplement: A 6-month randomized, double-blind, placebo-controlled trial. Effect of psyllium on gastric emptying, hunger feeling and food intake in normal vol- unteers: A double blind study. Vegetable, fruit, and cereal fiber intake and risk of coronary heart dis- ease among men. Comparative continuous-indirect-calorimetry study of two carbohydrates with different glycemic indices. Effect of dietary fibre on glucose control and serum lipoproteins in diabetic patients. Dietary fiber, inulin, and oligofructose: A review comparing their physiological effects. Reducing sulfur compounds of the colon impair colonocyte nutrition: Implications for ulcerative colitis. Dietary factors and risk of prostate cancer: A case-control study in Ontario, Canada. Ronco A, De Stefani E, Boffetta P, Deneo-Pellegrini H, Mendilaharsu M, Leborgne F. Vegetables, fruits, and related nutrients and risk of breast cancer: A case-control study in Uruguay. A dietary fibre supple- ment and weight maintenance after weight reduction: A randomized, double- blind, placebo-controlled long-term trial. Effects of polydextrose on serum lipids, lipoproteins, and apolipoproteins in healthy subjects. Dietary fiber, glycemic load, and risk of non-insulin-dependent diabetes mellitus in women. The effect of citrus pectin on the absorption of nutrients in the small intestine. Lack of effect of a low-fat, high-fiber diet on the recurrence of colorectal adenomas. Ileal recovery of starch from whole diets containing resistant starch measured in vitro and fermentation of ileal effluent. A high carbohydrate leguminous fibre diet improves all aspects of diabetic control. Influence of refined cellulose on human bowel function and calcium and magnesium retention. Energy balance and thermogenesis in rats consuming nonstarch polysaccharides of various fermentabilities. Effect of oat bran muffins on calcium absorption and calcium, phosphorus, magnesium and zinc balance in men. Gaseous response to ingestion of a poorly absorbed fructo-oligosaccharide sweetener. Immunogenicity of foods and food additives—In vivo testing of gums arabic, karaya, and tragacanth. Dietary habits and breast cancer: A com- parative study of United States and Italian data. Dietary antioxidant vitamins and fiber in the etiology of cardiovascular disease and all-causes mortality: Results from the Scottish Heart Health Study. A comparative study of the effects on colon function caused by feeding ispaghula husk and polydextrose. Nutritional determinants of the increase in energy intake associated with a high-fat diet. Dietary fiber, vegetables, and colon cancer: Critical review and meta-analyses of the epidemiologic evidence. The prebiotic effects of biscuits containing partially hydrolysed guar gum and fructo-oligosaccharides— A human volunteer study. Colorectal cancer and the intake of nutri- ents: Oligosaccharides are a risk factor, fats are not. Tzonou A, Hsieh C-C, Polychronopoulou A, Kaprinis G, Toupadaki N, Trichopoulou A, Karakatsani A, Trichopoulos D. Effect of nondigestible oligosaccharides on large-bowel functions, blood lipid con- centrations and glucose absorption in young healthy male subjects. Effect of resistant starch on breath-hydrogen and methane excretion in healthy volunteers. Dietary fiber, beta-carotene and breast cancer: Results from a case- control study. Vitamins C and E, retinol, beta-carotene and dietary fibre in relation to breast cancer risk: A prospective cohort study. Effects of indigestible dextrin on blood glucose and insulin levels after various sugar loads in rats. Short chain fatty acid distribu- tions of enema samples from a sigmoidoscopy population: An association of high acetate and low butyrate ratios with adenomatous polyps and colon cancer. Relation of meat, fat, and fiber intake to the risk of colon cancer in a prospective study among women. Influence of dietary neosugar on selected bacterial groups of the human faecal microbiota. Calcium, magnesium, zinc, and iron balances in young women: Effects of a low-phytate barley-fiber con- centrate. In vitro and in vivo models for predicting the effect of dietary fiber and starchy foods on carbohydrate metabolism. Long-term intake of dietary fiber and decreased risk of coronary heart disease among women. Effect of dose and modification of viscous properties of oat gum on plasma glucose and insulin following an oral glucose load. Effects of fructo-oligosaccharides on blood glucose and serum lipids in diabetic subjects. Resistant starch is more effective than cholestyramine as a lipid-lowering agent in the rat. Comparative epidemiology of cancers of the colon, rectum, prostate and breast in Shanghai, China versus the United States. Saturated fatty acids are synthesized by the body to provide an adequate level needed for their physiological and structural func- tions; they have no known role in preventing chronic diseases. It is neither possible nor advisable to achieve 0 percent of energy from saturated fatty acids in typical whole-food diets. This is because all fat and oil sources are mixtures of fatty acids, and consuming 0 percent of energy would require extraordinary changes in pat- terns of dietary intake. It is possible to have a diet low in saturated fatty acids by following the dietary guidance provided in Chapter 11. Linoleic acid is the only n-6 polyunsaturated fatty acid that is an essential fatty acid; it serves as a precursor to eicosanoids. A lack of dietary n-6 polyunsaturated fatty acids is characterized by rough and scaly skin, dermatitis, and an elevated eicosatrienoic acid:arachidonic acid (triene:tetraene) ratio.
Even exposure to cool buy 500 mcg fluticasone with mastercard asthmatic bronchitis medications, damp environments can be dangerous to inade- quately clothed and physically exhausted individuals purchase fluticasone 250mcg mastercard asthma definition gina 2014. Accidental immersion due to capsizing of boats cheap fluticasone 500 mcg on line asthma symptoms 1 year old, poor choice of clothing during skiing 500 mcg fluticasone sale asthma symptoms pdf, change in weather, or physical exhaustion leading to an inability to generate ade- quate body heat to maintain core body temperature can all lead to death, even when temperatures are above freezing. Prevention of hypothermia and its treatment are beyond this report; however, hypothermia is unlikely to accrue from attempts to fulfill the physical activity recommendation. Because water and winter sports are gaining popularity and do provide means to enjoyably follow the physical activity recommendation, safe par- ticipation in such activities needs special instruction and supervision. However, Manson and colleagues (2002) recently reported that both walking and vigorous activity were associated with marked reductions in the incidence of cardiovascular events. In this triad, disordered eating and chronic energy deficits can disrupt the hypothalamic-pituitary axis, leading to loss of menses, osteopenia, and premature osteoporosis (Loucks et al. While dangerous in themselves, skeletal injuries can predispose victims to a cascade of events including thromboses, infections, and physical deconditioning. Prevention of Adverse Effects The possibility that exercise can result in overuse injuries, dehydration, and heart problems has been noted above. Consequently, a prudent approach to initiating physical activity or exercise by previously sedentary individuals is recommended. The evaluation should include a stress electrocardiogram and blood pressure evaluation. For all individuals initiating an exercise program, emphasis should be placed on the biological principle of stimulus followed by response. Hence, easy exercises must be performed regularly before more vigorous activities are conducted. Similarly, exercise participants need to rest and recover from previous activities prior to resuming or increasing training load. Also, as already noted, conditions of chronic soreness or acute pain and insomnia could be symptoms of over-training. Hence, activity progression should be discontinuous with adequate recovery periods to minimize chances of injury and permit physiological adaptations to occur. Attention also needs to be given to stretching and strengthening activities as part of the physical activity core to healthful living. The recommended quantity and quality of exercise for developing and maintaining fitness in healthy adults. Exercise Testing and Training of Apparently Healthy Individuals: A Handbook for Physicians. Muscular Work: A Metabolic Study with Special Refer- ence to the Efficiency of the Human Body as a Machine. Respiratory gas-exchange ratios during graded exer- cise in fed and fasted trained and untrained men. Physical activity and 10-year mortality from cardiovascular diseases and all causes: The Zutphen Elderly Study. Total energy expenditure and spontaneous activity in relation to training in obese boys. Physical activity, physical fitness, and all-cause mortality in women: Do women need to be active? Effects of exercise on appetite control: Loose coupling between energy expenditure and energy intake. Physical Activity, Fitness, and Health: International Proceedings and Consensus Statement. Balance of carbohydrate and lipid utilization during exercise: The ‘crossover’ concept. Glucose kinetics and exercise perfor- mance during phases of the menstrual cycle: Effect of glucose ingestion. Exercise intensity: Effect on postexercise O2 uptake in trained and untrained women. The effect of exercise on clinical depression and depression resulting from mental illness: A meta-analysis. Twenty-four-hour profile of plasma glucose and glucoregulatory hormones during normal living condi- tions in trained and untrained men. Healthy People: The Surgeon General’s Report on Health Promotion and Disease Prevention. Fitness, fatness, and the effect of training assessed by magnetic resonance imaging and skinfold-thickness measurements in healthy adolescent females. Training-induced alterations of carbohydrate metabolism in women: Women respond differently from men. Endurance training increases fatty acid turnover, but not fat oxidation, in young men. Jumping improves hip and lumbar spine bone mass in prepubescent children: A randomized controlled trial. Sympathetic and para- sympathetic changes in heart rate control during dynamic exercise induced by endurance training in man. Dietary carbohydrate and its effects on metabolism and substrate stores in sedentary and active individuals. Association between different attributes of physical activity and fat mass in untrained, endurance- and resistance-trained men. Characteristics of leisure time physical activity associated with decreased risk of premature all- cause and cardiovascular disease mortality in middle-aged men. Physical activity and reduced occurrence of non-insulin-dependent diabetes mellitus. Uncoupling the effects of energy expendi- ture and energy intake: Appetite response to short-term energy deficit induced by meal omission and physical activity. Utilization of skeletal muscle triacylglycerol during postexercise recovery in humans. High dose exercise does not increase hunger or energy intake in free living males. Leisure-time physical activity levels and risk of coronary heart disease and death. Ventilatory threshold and Vo2max changes in children following endurance training. Cardiovascular adaptations in 8- to 12-year-old boys following a 14-week running program. Walking compared with vigorous exercise for the prevention of cardiovascular events in women. Exercise, food intake and body weight in normal rats and genetically obese adult mice. Relation between caloric intake, body weight, and physical work: Studies in an industrial male population in West Bengal. The association of changes in physical-activity level and other lifestyle characteris- tics with mortality among men. Changes in energy balance and body composition at menopause: A controlled longitudinal study. The effect of aging on the cardiovascular response to dynamic and static exercise. Effects of physical exercise on anxiety, depression, and sensitivity to stress: A unifying theory. Physical fitness as a predictor of mortality among healthy, middle-aged Norwegian men. The effect of intensive endurance exercise training on body fat distribution in young and older men. Luteal and follicu- lar glucose fluxes during rest and exercise in 3-h postabsorptive women. Effects of moderate-intensity endurance and high-intensity intermittent train- ing on anaerobic capacity and Vo2max.
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