The influence of rurality on the volume of non-urgent emergency department visits

At least one-third of emergency department (ED) visits in the United States are non-urgent, for conditions that can be treated more efficiently in primary care settings. Research suggests rural areas may have higher non-urgent ED visit rates. Such research rarely accounts for spatial factors that may bias results, and is often limited to dichotomous rurality measures, either "rural" or "urban". We examined the association between multiple levels of rurality and ED visits in South Carolina. Controlling for spatial effects, the distance of Community Health Centers from the cores of populated areas (centroids), and the percentage of the population in poverty, increasing levels of rurality predicted higher rates of uninsured ED visits, non-urgent ED visits, non-urgent privately insured ED visits, and non-urgent uninsured ED visits. Results also demonstrated that estimates of effects of rurality on ED use that do not account for spatial random effects would be biased.     

Health Care Utilization Patterns for Young Children in Rural Counties of the I‐95 Corridor of South Carolina

Objective: The objective of this study was to assess health care utilization patterns for young children with Medicaid insurance in the rural counties of the I‐95 corridor in South Carolina relative to other regions of the state. We hypothesize that young children received less well care and higher levels of tertiary care in the rural counties along the I‐95 corridor (I‐95) of South Carolina. Design/Methods: A Medicaid cohort of children less than 3 years of age was used to compare Early, Periodic, Diagnosis, Screening and Treatment (EPSDT) visits; preventable emergency department (ED) visits; and inpatient visits between I‐95, other rural and urban county groupings. Results: The adjusted odds of a child having had 80% of the recommended EPSDT visits were reduced for I‐95 compared to other rural counties. The odds of a preventable inpatient or ED visit were increased for all rural counties, with the highest rates in the other rural counties. Conclusions: Children accessed well care less in the I‐95 corridor compared to other rural areas of South Carolina. Rural children accessed tertiary care more often than urban children, a finding most prominent outside the I‐95 corridor, likely attributable to more available access of tertiary care in rural counties outside the I‐95 corridor.     

Cost-sharing for emergency care and unfavorable clinical events: findings from the safety and financial ramifications of ED copayments study

Objective. To evaluate the effect of emergency department (ED) copayment levels on ED use and unfavorable clinical events. Data Source/Study Setting. Kaiser Permanente–Northern California (KPNC), a prepaid integrated delivery system. Study Design. In a quasi‐experimental longitudinal study with concurrent controls, we estimated rates of ED visits, hospitalizations, ICU admissions, and deaths associated with higher ED copayments relative to no copayment, using Poisson random effects and proportional hazard models, controlling for patient characteristics. The study period began in January 1999; more than half of the population experienced an employer‐chosen increase in their ED copayment in January 2000. Data Collection/Extraction Methods. Using KPNC automated databases, the 2000 U.S. Census, and California state death certificates, we collected data on ED visits and unfavorable clinical events over a 36‐month period (January 1999 through December 2001) among 2,257,445 commercially insured and 261,091 Medicare insured health system members. Principal Findings. Among commercially insured subjects, ED visits decreased 12 percent with the $20–35 copayment (95 percent confidence interval [CI]: 11–13 percent), and 23 percent with the $50–100 copayment (95 percent CI: 23–24 percent) compared with no copayment. Hospitalizations, ICU admissions, and deaths did not increase with copayments. Hospitalizations decreased 4 percent (95 percent CI: 2–6 percent) and 10 percent (95 percent CI: 7–13 percent) with ED copayments of $20–35 and $50–100, respectively, compared with no copayment. Among Medicare subjects, ED visits decreased by 4 percent (95 percent CI: 3–6 percent) with the $20–50 copayments compared with no copayment; unfavorable clinical events did not increase with copayments, e.g., hospitalizations were unchanged (95 percent CI: ?3 percent to +2 percent) with $20–50 ED copayments compared with no copayment. Conclusions. Relatively modest levels of patient cost‐sharing for ED care decreased ED visit rates without increasing the rate of unfavorable clinical events.     

The role of community health centers in delivering primary care to the underserved: experiences of the uninsured and Medicaid insured

Community health centers (CHCs) have long served an important safety-net healthcare delivery role for vulnerable populations. Federal efforts to expand CHCs, while potentially reducing the Federal budget for Medicaid, raise concern about how Medicaid and uninsured patients of CHCs will continue to fare. To examine the primary care experiences of uninsured and Medicaid CHC patients and compare their experiences with those of similar patients nationally, cross-sectional analyses of the 2002 CHC User Survey with comparison data from the 1998 and 2002 National Health Interview surveys were done. Self-reported measures of primary care access, longitudinality, and comprehensiveness of care among adults aged 18 to 64 years were used. Despite poorer health, CHCs were positively associated with better primary care experiences in comparison with similar patients nationally. Uninsured CHC patients were more likely than similar patients nationally to report a generalist physician visit in the past year (82% vs 68%, P < .001), having a regular source of care (96% vs 60%, P < .001), receiving a mammogram in the past 2 years (69% vs 49%, P < .001), and receiving counseling on exercise (68% vs 48%, P < .001). Similar results were found for CHC Medicaid patients versus Medicaid patients nationally. Even within CHCs, however, Medicaid patients tended to report better primary care experiences than the uninsured. Health centers appear to fill an important gap in primary care for Medicaid and uninsured patients. Nonetheless, this study suggests that Medicaid insurance remains fundamental to accessing high-quality primary care, even within CHCs.     

Ambulatory medical care utilization estimates for 2005

OBJECTIVE: This report presents statistics on ambulatory care visits to physician offices, hospital outpatient departments (OPDs), and hospital emergency departments (EDs) in the United States in 2005. Ambulatory medical care utilization is described in terms of patient, practice, facility, and visit characteristics. METHODS: Data from the 2005 National Ambulatory Medical Care Survey (NAMCS) and the National Hospital Ambulatory Medical Care Survey (NHAMCS) were combined to produce averaged annual estimates of ambulatory medical care utilization. RESULTS: Patients in the United States made an estimated 1.2 billion visits to physician offices and hospital OPDs and EDs, a rate of 4.0 visits per person annually. Between 1995 and 2005, population visit rates increased by about 20% in primary care offices, surgical care offices, and OPDs; 37% in medical specialty offices; and 7% in EDs. The aging of the population has contributed to increased volume of visits because older patients have higher visit rates. Visits by patients 40-59 years of age represented about 28.5 percent in 2005, compared with 23.9 percent in 1995. Black persons had higher visit rates than white persons to hospital OPDs and EDs, but lower visit rates to office-based primary care and to surgical and medical specialists. In the ED, the visit rate for patients with no insurance was about twice that of those with private insurance; whereas for all types of office-based care, the visit rates were higher for privately insured persons than for uninsured persons. About 29.4 percent of all ambulatory care visits were for chronic diseases and 25.2 percent were for preventive care, including checkups, prenatal care, and postsurgical care. The leading treatment provided at ambulatory care visits was medicinal with 71.3 percent of all visits having one or more medications prescribed, up by 10% since 1995 when encounters with drug therapy represented 64.9 percent of all visits. In 2005, 2.4 billion medications were prescribed or administered at these visits.     

Exploring the limits of the safety net: community health centers and care for the uninsured

This paper explores the extent to which community health centers (CHCs) are able to manage their uninsured patient caseloads. We found that CHCs can provide primary care, medications, and medical supplies to most of their uninsured patients on site but are limited in their ability to provide diagnostic, specialty, and behavioral health services. Uninsured patients often fail to receive additional services for which they are referred, and it is much more difficult for CHC physicians to arrange specialty or nonemergency hospital care for their uninsured patients than for their insured patients.     

Awareness and Management of Chronic Disease, Insurance Status, and Health Professional Shortage Areas in the REasons for Geographic and Racial Differences in Stroke (REGARDS): A Cross-Sectional Study

ABSTRACT: BACKGROUND: Limited financial and geographic access to primary care can adversely influence chronic disease outcomes. We examined variation in awareness, treatment, and control of hypertension, diabetes, and hyperlipidemia according to both geographic and financial access to care. METHODS: We analyzed data on 17,458 participants in the REasons for Geographic And Racial Differences in Stroke (REGARDS) study with either hypertension, hyperlipidemia, or diabetes and living in either complete Health Professional Shortage Area (HPSA) counties or non-HPSA counties in the U.S. All analyses were stratified by insurance status and adjusted for sociodemographics and health behaviors. RESULTS: 2,261 residents lived in HPSA counties and 15,197 in non-HPSA counties. Among the uninsured, HPSA residents had higher awareness of both hypertension (adjusted OR 2.30, 95% CI 1.08, 4.89) and hyperlipidemia (adjusted OR 1.50, 95% CI 1.01, 2.22) compared to non-HPSA residents. Also among the uninsured, HPSA residents with hypertension had lower blood pressure control (adjusted OR 0.45, 95% CI 0.29, 0.71) compared with non-HPSA residents. Similar differences in awareness and control according to HPSA residence were absent among the insured. CONCLUSIONS: Despite similar or higher awareness of some chronic diseases, uninsured HPSA residents may achieve control of hypertension at lower rates compared to uninsured non-HPSA residents. Federal allocations in HPSAs should target improved quality of care as well as increasing the number of available physicians.     

Children’s Receipt of Health Care Services and Family Health Insurance Patterns

PURPOSE Insured children in the United States have better access to health care services; less is known about how parental coverage affects children’s access to care. We examined the association between parent-child health insurance coverage patterns and children’s access to health care and preventive counseling services.METHODS We conducted secondary analyses of nationally representative, cross-sectional, pooled 2002–2006 data from children (n = 43,509), aged 2 to 17 years, in households responding to the Medical Expenditure Panel Survey (MEPS). We assessed 9 outcome measures pertaining to children’s unmet health care and preventive counseling needs.RESULTS Cross-sectionally, among US children (aged 2 to 17 years) living with at least 1 parent, 73.6% were insured with insured parents, 8.0% were uninsured with uninsured parents, and the remaining 18.4% had discordant family insurance coverage patterns. In multivariable analyses, insured children with uninsured parents had higher odds of an insurance coverage gap (odds ratio [OR] = 2.45; 95% confidence interval [CI], 2.02–2.97), no usual source of care (OR = 1.31; 95% CI, 1.10–1.56), unmet health care needs (OR = 1.11; 95% CI, 1.01–1.22), and having never received at least 1 preventive counseling service (OR = 1.20; 95% CI, 1.04–1.39) when compared with insured children with insured parents. Insured children with mixed parental insurance coverage had similar vulnerabilities.CONCLUSIONS Uninsured children had the highest rates of unmet needs overall, with fewer differences based on parental insurance status. For insured children, having uninsured parents was associated with higher odds of going without necessary services when compared with having insured parents.     

Lengthening Spells of Uninsurance and Their Consequences

The lengths of time adults are without health insurance have increased since 1988, as shown by data from 1,235 household interviews completed during 1992 in Nebraska. Rural residents without insurance have experienced longer such spells than their urban counterparts. Thus, while rates of uninsurance are nearly the same between urban and rural residents, important differences exist. The relationship between insurance status and physician utilization is consistent during the five years (1989 to 1993) covered in this study. Continuously insured persons have the most physician visits, followed by those intermittently insured, followed by those continuously uninsured. The number of physician visits was expected to increase when respondents moved from uninsured to insured status. However, among urban respondents, the number of visits declined; among residents in rural frontier counties (fewer than six person per square mile) and for respondents in rural nonfrontier counties, there was no significant difference. This study points out some differences between rural and urban populations regarding insurance status, even when the overall rates of uninsurance are equal.     

Community Health Center Use After Oregon’s Randomized Medicaid Experiment

PURPOSEThere is debate about whether community health centers (CHCs) will experience increased demand from patients gaining coverage through Affordable Care Act Medicaid expansions. To better understand the effect of new Medicaid coverage on CHC use over time, we studied Oregon’s 2008 randomized Medicaid expansion (the “Oregon Experiment”).METHODSWe probabilistically matched demographic data from adults (aged 19–64 years) participating in the Oregon Experiment to electronic health record data from 108 Oregon CHCs within the OCHIN community health information network (originally the Oregon Community Health Information Network) (N = 34,849). We performed intent-to-treat analyses using zero-inflated Poisson regression models to compare 36-month (2008–2011) usage rates among those selected to apply for Medicaid vs not selected, and instrumental variable analyses to estimate the effect of gaining Medicaid coverage on use. Use outcomes included primary care visits, behavioral/mental health visits, laboratory tests, referrals, immunizations, and imaging.RESULTSThe intent-to-treat analyses revealed statistically significant differences in rates of behavioral/mental health visits, referrals, and imaging between patients randomly selected to apply for Medicaid vs those not selected. In instrumental variable analyses, gaining Medicaid coverage significantly increased the rate of primary care visits, laboratory tests, referrals, and imaging; rate ratios ranged from 1.27 (95% CI, 1.05–1.55) for laboratory tests to 1.58 (95% CI, 1.10–2.28) for referrals.CONCLUSIONSOur results suggest that use of many different types of CHC services will increase as patients gain Medicaid through Affordable Care Act expansions. To maximize access to critical health services, it will be important to ensure that the health care system can support increasing demands by providing more resources to CHCs and other primary care settings.     

Primary Health Care in Community Health Centers and Comparison with Office-Based Practice

We examine the roles of nurse practitioners (NPs), physician assistants (PAs), and nurse midwives (CNMs) in community health centers (CHCs). We also compare primary care physicians in CHCs with office-based physicians. Estimates are from the National Ambulatory Medical Care Survey, a nationally representative annual survey of nonfederal, office-based patient care physicians and their visits. Analysis of primary care delivery in CHCs and office-based practices are based on 1,434 providers and their visits (n = 32,300). During 2006–2007, on average, physicians comprised 70% of CHC clinicians, with NPs (20%), PAs (9%), and CNMs (1%) making up the remainder. PAs, NPs, and CNMs provided care in almost a third of CHC primary care visits; 87% of visits to these CHC providers were independent of physicians. Types of patients seen by clinicians suggest a division of labor in caring for CHC patients. NPs and PAs were more likely than physicians to report providing health education services. There were no other differences among services examined. Office-based physicians were less likely to work alongside PAs/NPs/CNMs than CHC physicians. CHC staffing is contingent on a variety of providers. CHC staffing patterns may serve as models of primary care staffing for office practices as demand for primary care services nationwide increases.     

Emergency Room Visits by Uninsured Child and Adult Residents in Ontario,Canada: What Diagnoses,Severity and Visit Disposition Reveal About the Impact of Being Uninsured

Canadian immigrants can be without health insurance for many reasons but limited data exists regarding uninsured health outcomes. Uninsured Canadian residents were identified in the National Ambulatory Care Reporting System for all visits to emergency departments in Ontario, Canada between 2002/3 and 2010/11 (N = 44,489,750). Frequencies for main diagnoses, severity (triage), and visit disposition were compared. Ambulatory care sensitive conditions were identified in a 10 % subsample. The uninsured (N = 140,730; 0.32 %) were more likely to be diagnosed with mental health (insured: 3.48 %; uninsured: 10.47 %) or obstetric problems (insured: 2.69 %; uninsured: 5.56 %), be triaged into the two most severe categories (insured: 11.2 %; uninsured 15.6 %), leave untreated (insured: 3.1 %; uninsured: 5.4 %), or die (insured: 2.8 %; uninsured: 3.7 %). More ACSC visits were made by uninsured children and youth. Insurance status is associated with more serious health status on arrival to emergency departments and more negative visit outcomes.     

Effects of health insurance and race on colorectal cancer treatments and outcomes

OBJECTIVES: We hypothesized that health insurance payer and race might influence the care and outcomes of patients with colorectal cancer. METHODS: We examined treatments received for all incident cases of colorectal cancer occurring in Florida in 1994 (n = 9551), using state tumor registry data. We also estimated the adjusted risk of death (through 1997), using proportional hazards regression analysis controlling for other predictors of mortality. RESULTS: Treatments received by patients varied considerably according to their insurance payer. Among non-Medicare patients, those in the following groups had higher adjusted risks of death relative to commercial fee-for-service insurance: commercial HMO (risk ratio [RR] = 1.40; 95% confidence interval [CI] = 1.18, 1.67; P = .0001), Medicaid (RR = 1.44; 95% CI = 1.06, 1.97; P = .02), and uninsured (RR = 1.41; 95% CI = 1.12, 1.77; P = .003). Non-Hispanic African Americans had higher mortality rates (RR = 1.18; 95% CI = 1.01, 1.37; P = .04) than non-Hispanic Whites. CONCLUSIONS: Patients with colorectal cancer who were uninsured or insured by Medicaid or commercial HMOs had higher mortality rates than patients with commercial fee-for-service insurance. Mortality was also higher among non-Hispanic African American patients.     

A description of outpatient drug use in rural China: evidence of differences due to insurance coverage

This paper describes the effects of health financing systems (insurance) on outpatient drug use in rural China. 1320 outpatients were interviewed (exit interview) in the randomly selected county, township and village health care facilities in five counties in three provinces of central China. The interview was face to face. Questions were asked by a trained interviewer and were answered by patient him/herself. The main finding was that health insurance appeared to influence drug use in outpatient services. The average number of drugs per visit was 2·56 and drug expenditures per visit was 16·9 yuan. Between insured and uninsured (out‐of‐pocket) groups, there were significant differences in the number of drugs and drug expenditures per visit. The insured had a lower number of drugs and a higher drug expenditure per visit than the uninsured, implying the use of more expensive drugs per visit than the uninsured. There were also significant differences in the number of drugs and drug expenditures per visit between the types of insurance. One third of the drugs were anti‐infectives, most of which were penicillin, gentamycin and sulfonamides. The results imply that uninsured patients do not receive the same care as the insured do even if they have the same needs. The fee‐for‐service financing for hospitals and health insurance have changed health providers' and consumers' behaviour and resulted in the increase of medical expenditure. Copyright © 1999 John Wiley & Sons, Ltd.     

Rural‐Urban Differences in Consumer Governance at Community Health Centers

Context: Community health centers (CHCs) are primary care clinics that serve mostly low‐income patients in rural and urban areas. They are required to be governed by a consumer majority. What little is known about the structure and function of these boards in practice suggests that CHC boards in rural areas may look and act differently from CHC boards in urban areas. Purpose: To identify differences in the structure and function of consumer governance at CHCs in rural and urban areas. Methods: Semistructured telephone interviews were conducted with 30 CHC board members from 14 different states. Questions focused on board members’ perceptions of board composition and the role of consumers on the board. Findings: CHCs in rural areas are more likely to have representative boards, are better able to convey confidence in the organization, and are better able to assess community needs than CHCs in urban areas. However, CHCs in rural areas often have problems achieving objective decision‐making, and they may have fewer means for objectively evaluating quality of care due to the lack of patient board member anonymity. Conclusions: Consumer governance is implemented differently in rural and urban communities, and the advantages and disadvantages in each setting are unique.     

US emergency department costs: no emergency.

BACKGROUND: Many perceive emergency department (ED) overuse as an important cause of high medical care costs in the United States. Managed care plans and politicians have seen constraints on ED use as an important element of cost control. METHODS: We measured ED-associated and other medical care costs, using the recently released 1987 National Medical Expenditure Survey of approximately 35,000 persons in 14,000 households representative of the US civilian, noninstitutionalized population. RESULTS: In 1987, total ED expenditures were $8.9 billion, or 1.9% of national health expenditures. People with health insurance represented 86% of the population and accounted for 88% of ED spending. The uninsured paid 47% of ED costs themselves; free care covered only 10%. For the uninsured, the cost of hospitalization initiated by ED visits totaled $3.3 billion, including $1.1 billion in free care. Whites accounted for 75% of total ED costs. The ED costs of poor and near-poor individuals accounted for only 0.47% of national health costs. CONCLUSIONS: ED use accounts for a small share of US medical care costs, and cost shifting to the insured to cover free ED care for the uninsured is modest. Constraining ED use cannot generate substantial cost savings but may penalize minorities and the poor, who receive much of their outpatient care in EDs.     

Rates of Hospital-Based Care among Older Adults in the Community and Residential Care Facilities: A Repeated Cross-Sectional Study

ObjectiveWe examine annual rates of emergency department (ED) visits, hospital admissions, and alternate levels of care (ALC) days (ie, the number of days that an older adult remained in hospital when they could not be safely discharged to an appropriate setting in their community) among older adults.DesignRepeated cross-sectional study.Setting and ParticipantsLinked, individual-level health system administrative data on community-dwelling persons, home care recipients, residents of assisted living facilities, and residents of nursing homes aged 65 years and older in Ontario, Canada, from January 1, 2013, to December 31, 2019.MethodsWe calculated rates of ED visits, hospital admissions, and ALC days per 1000 individuals per older adult population per year. We used a generalized linear model with a gaussian distribution, log link, and year fixed effects to obtain rate ratios.ResultsThere were 1,655,656 older adults in the community, 237,574 home care recipients, 42,600 older adults in assisted living facilities, and 94,055 older adults in nursing homes in 2013; there were 2,129,690 older adults in the community, 281,028 home care recipients, 56,975 older adults in assisted living facilities, and 95,925 older adults in nursing homes in 2019. Residents of assisted living facilities had the highest rates of ED visits (1260.69₂₀₁₉ vs 1174.91₂₀₁₃), hospital admissions (482.63₂₀₁₉ vs 480.19₂₀₁₃), and ALC days (1905.57₂₀₁₉ vs 1443.03₂₀₁₃) per 1000 individuals. Residents of assisted living facilities also had significantly higher rates of ED visits [rate ratio (RR) 3.30, 95% CI 3.20, 3.41), hospital admissions (RR 6.24, 95% CI 6.01, 6.47), and ALC days (RR 25.68, 95% CI 23.27, 28.35) relative to community-dwelling older adults.Conclusions and ImplicationsThe disproportionate use of ED visits, hospital admissions, and ALC days among residents of assisted living facilities may be attributed to the characteristics of the population and fragmented licensing and regulation of the sector, including variable models of care. The implementation of interdisciplinary, after-hours, team-based approaches to home and primary care in assisted living facilities may reduce the potentially avoidable use of ED visits, hospital admissions, and ALC days among this population and optimize resource allocation in health care systems.     

Children''s Health Insurance Status, Access to and Utilization of Health Services, and Unmet Health Needs in a Rural Alabama School System

PURPOSE: This study examines the relationship between children's health insurance status and utilization of health services, establishment of a medical home, and unmet health needs over a 3-year period (1996-1998) in a rural Alabama K-12 school system. METHODS: As part of a children's health insurance outreach program, questionnaires were administered to parents of 754 children regarding health and health care access. In addition, noninvasive head-to-toe physical assessments of children were conducted on-site at 4 schools. FINDINGS: A relationship between health care utilization and insurance status was observed. Results found that insured children had 1.183 (P < .0115) times the number of medical visits as uninsured children. Among uninsured children, the time since last dental visit was 1.6 (P < .001) times longer than that of insured children. Also, insured children were 5.21 times more likely than uninsured (P < .0001) to report having a medical home. No significant differences between insured and uninsured children were found regarding unmet health needs as measured by referrals made after the children's physical assessments. CONCLUSIONS: Child health coverage is an important determining factor in the ability of families to access and utilize health care services. These findings have implications for populations in similar rural communities across the nation.     

Cancer Incidence in Kentucky, Pennsylvania, and West Virginia: Disparities in Appalachia

CONTEXT: Composed of all or a portion of 13 states, Appalachia is a heterogeneous, economically disadvantaged region of the eastern United States. While mortality from cancer in Appalachia has previously been reported to be elevated, rates of cancer incidence in Appalachia remain unreported. PURPOSE: To estimate Appalachian cancer incidence by stage and site and to determine if incidence was greater than that in the United States. METHODS: Using 1994--1998 data from the central registries of Kentucky, Pennsylvania, and West Virginia, age-adjusted incidence rates were calculated for the rural and nonrural regions of Appalachia. These state rates were compared to rates from the Surveillance, Epidemiology, and End Results (SEER) program for the same years by calculating the adjusted rate ratio (RR) and a 95% confidence interval (CI). FINDINGS: Both the entire and rural Appalachian regions had an adjusted incidence rate for all cancer sites similar to the SEER rate (RR = 1.00 [95% CI, 1.00-1.01] and RR = 0.99 [95% CI, 0.99-1.00], respectively). However, incidence of cancer of the lung/ bronchus, colon, rectum, and cervix in Appalachia was significantly elevated (RR = 1.22 [95% CI, 1.20-1.23], 1.13 [95% CI, 1.11-1.14], 1.19 [95% CI, 1.16-1.22], and 1.12 [95% CI, 1.07-1.17], respectively). Incidence of cancer of the lung/bronchus and cervix in rural Appalachia was even more elevated (RR = 1.34 [95% CI, 1.31-1.36] and 1.29 [95% CI, 1.21-1.38], respectively). Incidence of unstaged disease for all cancer sites in Appalachia (RR = 1.06 [95% CI, 1.05-1.08]), particularly rural Appalachia (RR = 1.28 [95%CI, 1.25-1.301), was elevated. CONCLUSIONS: Cancer incidence in Appalachia was not found to be elevated. However, incidence of cancer of the lung/bronchus, colon, rectum, and cervix was elevated in Appalachia. The rates of unstaged cancer of every examined site were elevated in rural Appalachia, suggesting a lack of access to cancer health care.     

2010年北京热浪对医院急诊量的影响

目的探索2010年北京高温热浪对总就诊量及不同年龄段、性别、病种人群急诊就诊量的影响。方法本研究使用的北京市日最高温度和日平均温度数据均来自于美国国家气候数据中心（U．S．NationalClimaticDataCenter,NCDC）网站。急诊就诊量数据来源于北京市某三级综合医院。按日最高气温持续3d≥35℃选择热浪期（2010年7月22-30日）,按照与热浪期同季节就近、天数相同、星期匹配、以及期间无高温日等原则选择对照期（2009年7月23-31日）。通过计算热浪期与对照期医院急诊就诊量的相对危险度（RR）,分析热浪对医院各类人群急诊就诊量的影响。结果北京某医院热浪期急诊就诊总量达1567人次,较对照期（1433人次）增加9．4％,热浪期相对于对照期总就诊风险有所升高（RR=1．09,95％CI：1．05—1．13）。热浪期儿童急诊就诊总量为434人次,较对照期（269人次）增加61．3％,热浪期相对于对照期儿童急诊就诊风险相对较高（RR=1．61,95％CI：1．49—1．74）。热浪期老年人急诊就诊总量为243人次,较对照期（193人次）增加25．9％,热浪期相对于对照期老年人急诊就诊风险相对较高（RR=1．26,95％CI：1．14～1．39）。热浪期呼吸系统疾病急诊就诊总量为497人次,较对照期（434人次）增加14．5％,热浪期较对照期急诊就诊风险有所升高（RR=1．15,95％CI：1．07～1．22）。热浪期较对照期不同性别人群急诊就诊风险均有所增加,男性RR为1．08（95％CI：1．03—1．14）,女性RR为1．11（95％CI：1．05～1．16）。结论热浪会增加人群的急诊就诊风险,其中老年人、儿童和呼吸系统疾病患者为热浪健康影响的敏感人群。