Impact of a chest-pain guideline on clinical decision-making

OBJECTIVE: To evaluate the impact of a chest-pain guideline on clinical decision-making and medium-term outcomes of patients presenting to a hospital emergency department (ED) with non-traumatic chest pain. DESIGN: Before-and-after guideline implementation study. SETTING: Bankstown-Lidcombe Hospital, Sydney, NSW (454-bed metropolitan teaching hospital), in the six-month periods before and after guideline implementation in February 2001. PARTICIPANTS: Patients presenting to the ED with non-traumatic chest pain who had chest-pain assessment forms completed by ED doctors, comprising 422/768 (54.9%) of those presenting before and 461/691 (66.7%) after guideline implementation. MAIN OUTCOME MEASURES: Appropriateness of admission/discharge decisions compared with decision of senior cardiologist based on guideline; death, recurrent chest pain, ED re-presentation and hospital readmission in the ensuing three months. RESULTS: After guideline implementation, appropriate admission/discharge decisions increased significantly from 180/265 (68%) to 261/324 (81%) (difference, 13%; 95% CI, 6%-20%). The largest increase was for patients at moderate risk of death or acute myocardial infarction within six months, from 39/96 (38%) to 57/103 (55%) (difference, 18%; 95% CI, 4%-31%). Increases were seen for both junior doctors (interns and resident medical officers) (18%; 95% CI, 7%-30%) and senior doctors (11%; 95% CI, 2%-19%). Logistic regression showed that implementation of the guideline, seniority of assessing doctor and patient history of coronary disease were independent predictors of appropriate decisions. There was a significant decline in re-presentations to ED with recurrent chest pain in patients previously presenting with cardiac or possibly cardiac pain, from 46/201 (23%) before implementation to 32/247 (13%) after (difference, 210%; 95% CI, 217% to 23%). CONCLUSIONS: The chest-pain guideline resulted in a significant improvement in clinical decision-making in the ED and reduced re-presentations with cardiac/possibly cardiac chest pain.     

Trends in licit opioid use in Australia, 1984-1998: comparative analysis of international and jurisdictional data

OBJECTIVES: To examine trends from 1984 to 1998 in licit opioids used in Australia compared with nine other developed countries, and in New South Wales compared with other Australian jurisdictions. DESIGN: Poisson regression analysis of annual rates of national and jurisdictional consumption of methadone, morphine and pethidine. MAIN OUTCOME MEASURES: All drug data were standardised to defined daily doses per 1000 population per day. RESULTS: Methadone consumption increased by, on average, 12% per year (RR, 1.12; 95% CI, 1.08-1.17), with Australia in the first rank of countries. Morphine use increased by 5% per year (RR, 1.05; 95% CI, 1.02-1.09), with Australia ranking equal second with three other countries behind Denmark. Consumption of pethidine in all 10 countries was unchanged (RR, 0.99; 95% CI, 0.97-1.00), with Australia equal first. In Australia, use of methadone syrup increased by 17% per year (RR, 1.17; 95% CI, 1.16-1.17) and by 11% per year for methadone tablets (RR, 1.11; 95% CI, 1.10-1.12). Consumption of methadone syrup in NSW was more than double that of any other jurisdiction. Consumption of methadone tablets was 2.4 times higher in South Australia (RR, 2.35; 95% CI, 2.09-2.65) than NSW. The Northern Territory, Tasmania and Queensland also had significantly higher consumption than NSW. From 1991 to 1998, controlled-release morphine consumption increased by 27% per year nationally (RR, 1.27; 95% CI, 1.24-1.30). The NT had 2.6 times more supply of morphine (RR, 2.63; 95% CI, 1.71-4.03) and Tasmania 58% more supply than NSW (RR, 1.58; 95% CI, 1.11-2.25). CONCLUSIONS: Australia's consumption of licit opioids ranked high internationally. There were diverse trends in the supply of licit opioids to Australia's jurisdictions, resulting in a heterogeneous pattern throughout the country.     

Un-health promotion: results of a survey of alcohol promotion on television

To estimate how widely and to whom alcoholic drinks are promoted 1258 television advertisements were studied over a 10 week period that included the Christmas and New Year holidays in 1986-7. A total of 156 advertisements (12%) promoted alcohol, and this percentage increased significantly over the holiday period to 17%. These advertisements were longer than those advertising other products, and just over half (56%) occupied the first position in commercial breaks. During sports programmes and between the hours of 1800 and 1900 there was an increase in the number of advertisements for alcohol, but there was no difference before and after 2100. It was found that the extent and influence of the promotion of alcohol were great and that such advertising is seen by many children and adolescents.     

The Threats to Australian Patient Safety (TAPS) study: incidence of reported errors in general practice

OBJECTIVE: To determine the incidence of errors anonymously reported by general practitioners in NSW. DESIGN: The Threats to Australian Patient Safety (TAPS) study used anonymous reporting of errors by GPs via a secure web-based questionnaire for 12 months from October 2003. SETTING: General practices in NSW from three groupings: major urban centres (RRMA 1), large regional areas (RRMA 2-3), and rural and remote areas (RRMA 4-7). PARTICIPANTS: 84 GPs from a stratified random sample of the population of 4666 NSW GPs - 41 (49%) from RRMA 1, 22 (26%) from RRMA 2-3, and 21 (25%) from RRMA 4-7. Participants were representative of the GP source population of 4666 doctors in NSW (Medicare items billed, participant age and sex). MAIN OUTCOME MEASURES: Total number of error reports and incidence of reported errors per Medicare patient encounter item and per patient seen per year. RESULTS: 84 GPs submitted 418 error reports, claimed 490 864 Medicare patient encounter items, and saw 166 569 individual patients over 12 months. The incidence of reported error per Medicare patient encounter item per year was 0.078% (95% CI, 0.076%-0.080%). The incidence of reported errors per patient seen per year was 0.240% (95% CI, 0.235%-0.245%). No significant difference was seen in error reporting frequency between RRMA groupings. CONCLUSIONS: This is the first study describing the incidence of GP-reported errors in a representative sample. When an anonymous reporting system is provided, about one error is reported for every 1000 Medicare items related to patient encounters billed, and about two errors are reported for every 1000 individual patients seen by a GP.     

The rising incidence of childhood type 1 diabetes in New South Wales, 1990-2002

OBJECTIVES: To determine the incidence of childhood type 1 diabetes mellitus (T1DM) in New South Wales from 1997 to 2002; to compare with previously published rates (1990-1996); and to analyse trends in incidence from 1990 to 2002. DESIGN, SETTING AND PARTICIPANTS: Prospective population-based incidence study. Primary ascertainment of incident cases aged < 15 years was from the Australasian Paediatric Endocrine Group NSW children's diabetes register. Secondary ascertainment was from the National Diabetes Supply Scheme until 1999 and from the Australian Institute of Health and Welfare thereafter. Childhood population data were obtained from the Australian Bureau of Statistics. MAIN OUTCOME MEASURES: Age-standardised incidence; trends in incidence by calendar year, and sex and age at diagnosis. RESULTS: There were 3260 incident cases (1629 boys, 1631 girls) in the 13 years. Case ascertainment was 99.7% complete using the capture-recapture method. Mean age-standardised incidence per 100 000 person-years was 20.9 (95% CI, 19.9 to 21.9) from 1997 to 2002 compared with 17.8 (95% CI, 17.0 to 18.7) from 1990 to 1996; there was a plateau in incidence between 1997 and 2002. Overall, the incidence increased on average by 2.8% per year (95% CI, 1.9% to 3.8%, P < 0.001) and increased with age, being 12.2 (95% CI, 11.3 to 13.1) in 0-4 year olds; 18.9 (95% CI, 17.8 to 20.0) in 5-9 year olds and 26.7 (95% CI, 25.4 to 28.1) in 10-14 year olds. The increase per year in 0-4 year olds (3.9%) was not significantly higher than in older children. The mean incidence of T1DM was 19.8 (95% CI, 18.8 to 20.7) in girls and 18.8 (95% CI, 17.9 to 19.7) in boys (P = 0.02). CONCLUSIONS: The incidence of childhood-onset T1DM has increased significantly in all age groups in NSW since 1990. Resource planning in the management of childhood diabetes in NSW should take these findings into account.     

The Rate and Risk of Heat-Related Illness in Hospital Emergency Departments During the 1995 Chicago Heat Disaster

Objectives: To conduct an Emergency Department (ED)-based treated prevalence study of heat morbidity and to estimate the rate and risk of heat morbid events for all Chicago MSA EDs (N = 95; 2.7 million visits per year). Methods: ED patient log data were compiled from 13 randomly selected hospitals located throughout the Chicago MSA during the 2 weeks of the 1995 heat disaster and from the same 2-week period in 1994 (controls). Measurements included: age, sex, date, and time of ED service, up to three ICD-9 diagnoses, and disposition. Results: Heat morbidity for Chicago MSA hospital EDs was calculated at 4,224 (95%CI = 2964?5488) cases. ED heat morbidity increased significantly 5 days prior to the first heat-related death. In 1995, there was an increase in the estimated relative risk for the city = 3.85 and suburbs = 1.89 over the control year of 1994. Conclusions: Real time ED-based computer automated databanks should be constructed to improve public health response to infectious or noninfectious outbreaks. Rapid area-wide M&M tabulations can be used for advancing the effectiveness of community-based prevention programs, and anticipating hospital ED resource allocation.     

Effect of a community intervention on patient delay and emergency medical service use in acute coronary heart disease: The Rapid Early Action for Coronary Treatment (REACT) Trial

CONTEXT: Delayed access to medical care in patients with acute myocardial infarction (AMI) is common and increases myocardial damage and mortality. OBJECTIVE: To evaluate a community intervention to reduce patient delay from symptom onset to hospital presentation and increase emergency medical service (EMS) use. DESIGN AND SETTING: The Rapid Early Action for Coronary Treatment Trial, a randomized trial conducted from 1995 to 1997 in 20 US cities (10 matched pairs; population range, 55,777-238,912) in 10 states. PARTICIPANTS: A total of 59,944 adults aged 30 years or older presenting to hospital emergency departments (EDs) with chest pain, of whom 20,364 met the primary population criteria of suspected acute coronary heart disease on admission and were discharged with a coronary heart disease-related diagnosis. INTERVENTION: One city in each pair was randomly assigned to an 18-month intervention that targeted mass media, community organizations, and professional, public, and patient education to increase appropriate patient actions for AMI symptoms (primary population, n=10,563). The other city in each pair was randomly assigned to reference status (primary population, n=9801). MAIN OUTCOME MEASURES: Time from symptom onset to ED arrival and EMS use, compared between intervention and reference city pairs. RESULTS: General population surveys provided evidence of increased public awareness and knowledge of program messages. Patient delay from symptom onset to hospital arrival at baseline (median, 140 minutes) was identical in the intervention and reference communities. Delay time decreased in intervention communities by -4.7% per year (95% confidence interval [CI], -8.6% to -0.6%), but the change did not differ significantly from that observed in reference communities (-6. 8% per year; 95% CI, -14.5% to 1.6%; P=.54). EMS use by the primary study population increased significantly in intervention communities compared with reference communities, with a net effect of 20% (95% CI, 7%-34%; P<.005). Total numbers of ED presentations for chest pain and patients with chest pain discharged from the ED, as well as EMS use among patients with chest pain released from the ED, did not change significantly. CONCLUSIONS: In this study, despite an 18-month intervention, time from symptom onset to hospital arrival for patients with chest pain did not change differentially between groups, although increased appropriate EMS use occurred in intervention communities. New strategies are needed if delay time from symptom onset to hospital presentation is to be decreased further in patients with suspected AMI. JAMA. 2000;284:60-67     

Screening for Chlamydia trachomatis at the time of routine Pap smear in general practice: a cluster randomised controlled trial

OBJECTIVE: To determine whether asking general practitioners to offer chlamydia screening at the same time as Pap screening increases chlamydia screening rates. DESIGN: A pragmatic cluster randomised controlled trial. PARTICIPANTS AND SETTING: Doctors from 31 general practices in the Australian Capital Territory performing more than 15 Pap smear screens per year, and all women aged 16-39 years attending those practitioners between 1 November 2004 and 31 October 2005. INTERVENTION: Doctors in the intervention practices were asked to routinely offer combined chlamydia and Pap screening to eligible women; doctors in the control practices were asked to implement screening guidelines based on a risk assessment of the individual patient (ie, usual practice). MAIN OUTCOME MEASURE: Chlamydia screening rate per visit. RESULTS: There were 26 876 visits by eligible women during the study period: 16 082 to intervention practices and 10 794 to control practices. Chlamydia screening occurred during 6.9% (95% CI, 6.5%-7.3%) of visits to intervention practices and 4.5% (95% CI, 4.1%-4.9%) of visits to control practices. After controlling for clustering and potential confounders, there were twofold greater odds of chlamydia screening occurring during a visit by an eligible woman to an intervention practice than to a control practice (adjusted odds ratio, 2.1 [95% CI, 1.3-3.4]). CONCLUSION: Combining chlamydia and Pap screening increases the rate of chlamydia screening in general practice. Implementing this approach would require little additional infrastructure support in settings where a cervical screening program already exists.     

Prevalence of Intimate Partner Abuse in Women Treated at Community Hospital Emergency Departments

Context.— The majority of prior studies examining intimate partner abuse in the emergency department (ED) setting have been conducted in large, urban tertiary care settings and may not reflect the experiences of women seen at community hospital EDs, which treat the majority of ED patients in the United States. Objective.— To determine the prevalence of intimate partner abuse among female patients presenting for treatment in community hospital EDs and describe their characteristics. Design.— An anonymous survey conducted from 1995 through 1997 inquiring about physical, sexual, and emotional abuse. Setting.— Eleven community EDs in Pennsylvania and California. Participants.— All women aged 18 years or older who came to the ED during selected shifts. Main Outcome Measures.— Reported acute trauma from abuse, past-year physical or sexual abuse, and lifetime physical or emotional abuse. Results.— Surveys were completed by 3455 (74%) of 4641 women seen. The prevalence of reported abuse by an intimate partner was 2.2% (95% confidence interval [CI], 1.7%-2.7%) for acute trauma from abuse, 14.4% (95% CI, 13.2%-15.6%) for past-year physical or sexual abuse, and 36.9% (95% CI, 35.3%-38.6%) for lifetime emotional or physical abuse. California had significantly higher reported rates of past-year physical or sexual abuse (17% vs 12%, P<.001) and lifetime abuse (44% vs 31%, P<.001) than Pennsylvania. Logistic regression modeling identified 4 risk factors for reported physical, sexual, or acute trauma from abuse within the past year: age, 18 to 39 years (odds ratio [OR], 2.2; 95% CI, 1.7-3.0); monthly income less than $1000 (OR, 1.7; 95% CI, 1.3-2.1); children younger than 18 years living in the home (OR, 2.0; 95% CI, 1.5-2.6); and ending a relationship within the past year (OR, 7.0; 95% CI, 5.5-8.9). Conclusion.— If the prevalence of abuse in community hospitals throughout the United States is similar to the range of prevalence estimates found in this study, then heightened awareness of intimate partner abuse is warranted for patients presenting to the ED.      

The increasing problem of motorcycle injuries in children and adolescents

OBJECTIVE: To quantify an anecdotally apparent increase in motorcycle-related injuries in children and adolescents across Victoria. DESIGN, SETTING AND PARTICIPANTS: Retrospective analysis of paediatric motorcycle injuries (1 July 2000 - 30 June 2004) from a statewide emergency department (ED) database (Victorian Emergency Minimum Dataset [VEMD]) and the Trauma Registry database at the Royal Children's Hospital (RCH), Melbourne. MAIN OUTCOME MEASURES: Trends in paediatric motorcycle-related injuries over time; patient demographics, circumstances of accidents (on or off road), and injury characteristics, including severity markers. RESULTS: The VEMD recorded 3163 patients aged < or = 16 years presenting to EDs with motorcycle injuries during the study period; population-based rates of these injuries increased by an average of 9.6% per year (95% CI, 6.2%-13.1%; P < 0.005). In the same period, there was a total of 167 motorcycle-related admissions to the RCH, increasing annually in line with statewide ED presentations. About a quarter of paediatric motorcycle accidents occurred in children aged under 10 years (VEMD, 22%; RCH, 27%) and most occurred off road (VEMD,89%; RCH, 71%). At the RCH, median length of stay was 3 days (interquartile range [IQR], 1-7 days) and the median Injury Severity Score was 9 (IQR, 4-10); 41% of patients required an operation, 13% were admitted to an intensive care unit, and two died. CONCLUSION: In Victoria, the incidence of motorcycle-related injuries is increasing in children and adolescents. Most of these injuries occur off road, outside of any legislative framework. There is an urgent need for coordinated legislative changes and educational efforts to decrease motorcycle injuries in children.     

Evaluating the effectiveness of evidence-based guidelines for the use of spacer devices in children with acute asthma

OBJECTIVE: To change standard practice from using nebulisers to metered dose inhalers and holding chambers (spacers) in children presenting with mild to moderate acute asthma. DESIGN: A before-after comparison of children with acute asthma presenting to the emergency department (ED) between August and October 1999 with those presenting between June and August 1997. SETTING: A tertiary care metropolitan children's hospital. INTERVENTIONS: Evidence-based clinical practice guidelines for using spacers were developed by a local multidisciplinary consensus process. A multifaceted guideline implementation program was used in 1999. MAIN OUTCOME MEASURES: Physician prescribing practices (spacer use); clinical outcomes (need for hospitalisation, admission to intensive care unit, and length of stay [LOS]). RESULTS: 75 of 247 children (30%; 95% CI, 25%-36%) required hospital admission in 1999. This was similar to the 1997 study period, when 95 of 326 (29%; 95% CI, 24%-34%) children were admitted. Of those with mild to moderate asthma, 160 (68%) received bronchodilators in the ED; 151 (94%) were initially treated with a spacer device in 1999. In 1997, no children were initially treated with spacers in the ED. The median (range) LOS in hospital for children with asthma of all severities was 1.7 (0.5-19.8) days in 1999 and 1.7 (0.2-7.6) days in 1997 (P=0.85). CONCLUSIONS: We successfully changed standard practice from using nebulisers to spacers for bronchodilator delivery in children with mild to moderate acute asthma, with no difference in the need for or duration of hospitalisation.     

中国2004—2010艾滋病母婴传播率及母婴阻断药物应用状况的系统评价

目的:了解我国2004-2010年艾滋病母婴传播及母婴阻断药物应用状况。方法：全面检索CBM和Pubmed等中英文数据库,检索时间均从建库到2013年5月。对纳入的文献采用参照AHRQ横断面研究评价标准和STROBE声明拟定的四条标准进行质量评价。并将样本量、监测地点和监测年份作为主要异质性来源进行meta回归分析。采用Comprehensive Meta-Analysis V2.0 software 进行meta分析。结果：共检索到文献2356篇,最终纳入51篇进行分析。2004-2010年我国艾滋病母婴传播率依次分别为12.90%（95% CI: 7.48 %- 21.36%）,16.35%（95% CI: 10.41%- 24.73%）,6.45%（95% CI: 3.73 %- 10.93%）,6.25%（95% CI: 2.39%- 15.36%）,5.56%（95% CI: 2.79 %- 10.76%）,3.10%（95% CI: 1.59 %- 5.97%）,2.29%（95% CI: 1.36 %- 3.83%）。2004-2010年,我国艾滋病孕产妇中阻断药物应用率依次分别为70.39%（95% CI: 24.42%-94.59%）,71.99%（95% CI: 61.49%-80.54%）,78.79%（95% CI: 70.19%-85.43%）,86.84%（95% CI: 79.24%-91.94%）,82.71%（95% CI: 76.62%-87.48%）,81.85%（95% CI: 75.55%-86.80%）,86.16%（95% CI: 53.20%-97.15%）。2005-2010年婴儿阻断药物应用率依次分别为80.72%（95%CI: 72.89%-86.70%）,81.84%（95% CI:71.55%-88.98%）,85.43%（95% CI:80.99%-88.97%）,89.75%（95% CI: 81.82%-94.45%）,92.39%（95% CI: 84.97%-96.31%）,90.34%（95% CI: 85.50%-93.68%）。 结论：近年来我国艾滋病母婴传播率呈下降趋势,孕产妇及婴儿阻断药物应用率都有所升高。     

Injury caused by baby walkers: the predicted outcomes of mandatory regulations

OBJECTIVE: To examine the potential of the New South Wales baby-walker regulation to reduce injury. DESIGN: Injury surveillance data were used to reconstruct baby-walker injury incidents, which were examined in conjunction with the 2000 NSW baby-walker regulation, which requires a specified level of stability and a gripping mechanism to stop the walker at the edge of a step. SETTING AND PARTICIPANTS: Injury surveillance data on injuries to 381 babies collected from hospital emergency departments in South Australia and Victoria, 1986-2000. MAIN OUTCOME MEASURE: Injury events that would still have occurred with the regulation in place. RESULTS: About half (46%; 95% CI, 32.5%-59.8%) of the serious baby-walker injuries (ie, requiring admission to hospital) are caused by the walker enabling babies to reach hazards other than steps and stairs. CONCLUSION: The New South Wales regulation has the potential to eliminate only about half the baby-walker injuries. Banning baby walkers altogether is preferable.     

Antibiotic treatment of adults with sore throat by community primary care physicians: a national survey, 1989-1999

CONTEXT: Most sore throats are due to viral upper respiratory tract infections. Group A beta-hemolytic streptococci (GABHS), the only common cause of sore throat warranting antibiotics, is cultured in 5% to 17% of adults with sore throat. The frequency of antibiotic use for pharyngitis has greatly exceeded the prevalence of GABHS, but less is known about specific classes of antibiotics used. Only penicillin and erythromycin are recommended as first-line antibiotics against GABHS. OBJECTIVES: To measure trends in antibiotic use for adults with sore throat and to determine predictors of antibiotic use and nonrecommended antibiotic use. DESIGN, SETTING, AND SUBJECTS: Retrospective analysis of 2244 visits to primary care physicians in office-based practices in the National Ambulatory Medical Care Survey, 1989-1999, by adults with a chief complaint of sore throat. MAIN OUTCOME MEASURES: Treatment with antibiotics and treatment with nonrecommended antibiotics, extrapolated to US annual national rates. RESULTS: There were an estimated 6.7 million annual visits in the United States by adults with sore throat between 1989 and 1999. Antibiotics were used in 73% (95% confidence interval [CI], 70%-76%) of visits. Patients treated with antibiotics were given nonrecommended antibiotics in 68% (95% CI, 64%-72%) of visits. From 1989 to 1999, there was a significant decrease in use of penicillin and erythromycin and an increase in use of nonrecommended antibiotics, especially extended-spectrum macrolides and extended-spectrum fluoroquinolones (P<.001 for all trends). In multivariable modeling, increasing patient age (odds ratio [OR], 0.86 per decade; 95% CI, 0.79-0.94) and general practice specialty (OR, 1.54 compared with family practice specialty; 95% CI, 1.10-2.14) were independent predictors of antibiotic use. Among patients receiving antibiotics, nonrecommended antibiotic use became more frequent over time (OR, 1.17 per year; 95% CI, 1.11-1.24). CONCLUSIONS: More than half of adults are treated with antibiotics for sore throat by community primary care physicians. Use of nonrecommended, more expensive, broader-spectrum antibiotics is frequent.     

Mortality associated with New South Wales methadone programs in 1994: lives lost and saved

OBJECTIVES: To estimate the effects of methadone programs in New South Wales on mortality. DESIGN AND CASES: Retrospective, cross-sectional study of all 1994 New South Wales coronial cases in which methadone was detected in postmortem specimens taken from the deceased. Cases were people we identified as patients in NSW methadone maintenance programs or those whose deaths involved methadone syrup diverted from maintenance programs. OUTCOME MEASURES: Relative risks of fatal, accidental drug toxicity in the first two weeks of treatment and later; the number of lives lost as a result of maintenance treatment; preadmission risks and the number of lives saved by maintenance programs, calculated from data from a previous study. RESULTS: There was very close agreement between this study's classifications and official pathology reports of accidental drug toxicity. The relative risk (RR) of fatal accidental drug toxicity for patients in the first two weeks of methadone maintenance was 6.7 times that of heroin addicts not in treatment (95% CI RR, 3.3-13.9) and 97.8 times that of patients who had been in maintenance more than two weeks (95% CI RR, 36.7-260.5). Despite 10 people dying from iatrogenic methadone toxicity and diverted methadone syrup being involved in 26 fatalities. In 1994, NSW maintenance programs are estimated to have saved 68 lives (adjusted 95% CI, 29-128). CONCLUSIONS: In 1994, untoward events associated with NSW methadone programs cost 36 lives in NSW. To reduce this mortality, doctors should carefully assess and closely monitor patients being admitted to methadone maintenance and limit the use of takeaway doses of methadone.     

北京市颗粒物污染对慢性阻塞性肺疾病急性加重住院的影响

目的：研究北京市颗粒物污染对慢性阻塞性肺疾病急性加重（acute exacerbation of chronic obstructive pulmonary disease,AECOPD）的影响,并分析颗粒物污染对不同特征人群的影响差异。方法：从国家卫生与计划生育委员会医疗管理服务指导中心获取北京市2014年至2015年三甲医院AECOPD患者的住院资料,从中国空气质量监测平台获取同期大气污染资料,从中国气象局获取同期气象资料。采用广义相加Poisson回归模型,在控制长期趋势、周效应、节假日效应、气象条件等混杂因素后,评估PM2.5、PM10对AECOPD住院人次的影响。根据患者不同特征（性别、年龄）进行亚组分析,确定颗粒物污染的高危人群。结果：纳入15家医院,共7 884例住院患者,男女比例2.3 ∶1,65~79岁患者最多（45.5%）、≥80岁（37.1%）次之、<65岁（17.4%）最少。PM2.5、PM10日均浓度分别为（77.1±66.6） μg/m3、（111.9±75.8） μg/m3,两者均在移动平均滞后4 d时对AECOPD的影响最大,即PM2.5日均浓度每增加10 μg/m3,AECOPD住院人次增加0.53%（95%CI：0.01%~1.06%,P=0.0478）, PM10日均浓度每增加10 μg/m3,AECOPD住院人次增加0.53%（95%CI：0.07%~1.00%,P=0.025 0）。亚组分析结果显示,PM2.5、PM10日均浓度每增加10 μg/m3,女性患者住院人次分别增加1.13%（95%CI：0.19%~2.07%,P=0.018 3）、1.06%（95%CI：0.22%~1.91%,P=0.013 6）;≥80岁患者住院人次分别增加1.25%（95%CI：0.40%~2.11%,P=0.004 0）、1.18%（95%CI：0.42%~1.95%,P=0.002 4）;而男性、<65岁、65~79岁患者中,PM2.5、PM10与AECOPD的关联无统计学意义。由此可见,女性、≥80岁患者对颗粒物污染更敏感。结论：颗粒物污染会增加AECOPD住院风险,且女性、年老者风险更高。     

Type 2 diabetes in Indigenous and non-Indigenous children and adolescents in New South Wales

OBJECTIVE: To determine the incidence of type 2 diabetes mellitus (T2DM) in 2001-2006 in young people < 19 years and the characteristics of T2DM in the Indigenous group. DESIGN AND SETTING: Prospective population-based incidence study, New South Wales. PARTICIPANTS: Primary ascertainment was from the Australasian Paediatric Endocrine Group NSW Diabetes Register, with secondary ascertainment from the National Diabetes Register (Australian Institute of Health and Welfare). MAIN OUTCOME MEASURES: Incidence of T2DM in young people in NSW; incidence of T1DM and T2DM in Indigenous young people; characteristics at diagnosis. RESULTS: There were 128 incident cases of T2DM (62 boys, 66 girls) in the study period. The median age at diagnosis was 14.5 years (interquartile range, 13.0-16.4), and 90% were overweight or obese (body mass index > 85th percentile for age). Mean annual incidence was 2.5/100,000 person-years (95% CI, 2.1-3.0) in 10-18-year-olds. Of the ethnic groups represented, white Australian comprised 29%, Indigenous 22%, Asian 22%, North African/Middle Eastern 12% and Māori/Polynesian/Melanesian 10%. The incidence of T2DM was significantly higher in the Indigenous than the non-Indigenous group (incidence rate ratio, 6.1; 95% CI, 3.9-9.7; P<0.001), but incidence rates of T1DM were similar (15.5 v 21.4/100,000, respectively). CONCLUSIONS: T2DM accounts for 11% of incident cases of diabetes in 10-18-year-olds, and the majority are overweight or obese. The high rate among Indigenous Australian children supports screening for T2DM in this population.