Improving the quality of workers' compensation health care delivery: the Washington State Occupational Health Services Project.

This article has summarized research and policy activities undertaken in Washington State over the past several years to identify the key problems that result in poor quality and excessive disability among injured workers, and the types of system and delivery changes that could best address these problems in order to improve the quality of occupational health care provided through the workers' compensation system. Our investigations have consistently pointed to the lack of coordination and integration of occupational health services as having major adverse effects on quality and health outcomes for workers' compensation. The Managed Care Pilot Project, a delivery system intervention, focused on making changes in how care is organized and delivered to injured workers. That project demonstrated robust improvements in disability reduction; however, worker satisfaction suffered. Our current quality improvement initiative, developed through the Occupational Health Services Project, synthesizes what was learned from the MCP and other pilot studies to make delivery system improvements. This initiative seeks to develop provider incentives and clinical management processes that will improve outcomes and reduce the burden of disability on injured workers. Fundamental to this approach are simultaneously preserving workers' right to choose their own physician and maintaining flexibility in the provision of individualized care based on clinical need and progress. The OHS project then will be a "real world" test to determine if aligning provider incentives and giving physicians the tools they need to optimize occupational health delivery can demonstrate sustainable reduction in disability and improvements in patient and employer satisfaction. Critical to the success of this initiative will be our ability to: (1) enhance the occupational health care management skills and expertise of physicians who treat injured workers by establishing community-based Centers of Occupational Health and Education; (2) design feasible methods of monitoring patient outcomes and satisfaction with the centers and with the providers working with them in order to assess their effectiveness and value; (3) establish incentives for improved outcomes and worker and employer satisfaction through formal agreements with the centers and providers; and (4) develop quality indicators for the three targeted conditions (low back sprain, carpal tunnel syndrome, and fractures) that serve as the basis for both quality improvement processes and performance-based contracting. What lessons or insights does our experience offer thus far? The primary lesson is the importance of making effective partnerships and collaborations. Our policy and research activities have benefited significantly from the positive relationship the DLI established with the practice community through the Washington State Medical and Chiropractic Associations and from the DLI's close association with the Healthcare Subcommittee of the Workers' Compensation Advisory Committee. This committee is established by state regulation and serves as a forum for dialogue between the committee and the employer and labor communities. Our experience thus underscores the importance of establishing broad-based support for delivery system innovations. Our research activities have also benefited from the close collaboration between DLI program staff and UW health services researchers. The DLI staff brought important program and policy experience, along with an appreciation of the context and environment within which the research, policy, and R&D activities were conducted. The UW research team brought scientific rigor and methodological expertise to the design and implementation of the research and policy activities. In Washington State, the DLI represents a "single payer" for the purposes of workers' compensation. As discussed earlier, Washington State, along with five other states, has a state-fund system that requires all employers that are not self-insured to purchase workers' compensation insurance through the state fund. No matter what one feels about the merits or drawbacks of a single-payer system of health care financing, the fact is that such a system creates important opportunities for policy initiatives and for research and evaluation. Our ability to access population-based data on injured workers and to develop policy initiatives through innovation and pilot testing to assess whether proposed changes are really improvements has been critical. Understanding what works within the constraints and complexities of the system on a small scale is critical in order to bring forth policy and processes that will be of value systemwide. Finally, we note that general medical care faces many of the same quality-related problems and challenges as occupational health care. Medical care for chronic diseases, such as diabetes, is often fragmented and uncoordinated. (ABSTRACT TRUNCATED)

Two-year health and employment outcomes among injured workers enrolled in the Washington State Managed Care Pilot Project.

BACKGROUND: Increasing numbers of injured workers are being treated through managed care delivery systems, yet little is known about the long-term effects of care provided through these systems. We analyzed health outcomes, return to work, and employment status at 2 years post-injury among a cohort of workers who were previously enrolled in the Washington State Managed Care Pilot Project. METHODS: Data on functional status, satisfaction with quality of life, return to work and employment status were gathered via telephone interviews and mailed questionnaires from a subset of 374 injured workers who had a time loss claim that involved 4 or more days of lost work time. Of these 374 subjects, 106 were treated through managed care and 268 through fee-for-service (FFS) arrangements. Health outcomes were assessed through the SF-36, the Health Assessment Questionnaire (HAQ), and the Satisfaction with Quality of Life (QOL) instruments. Standard univariate and multivariate statistical methods were used to compare the two groups with respect to the health and employment outcomes. RESULTS: There were no statistically significant differences between the two groups in functional status, satisfaction with quality of life or employment outcomes, except in regard to perceived recovery. FFS patients were more likely to indicate their recovery at 2 years post injury was going well (62 vs. 45%, P = .01). Almost 90% of the injured workers returned to work at some point following their injury and 72% reported working during the 4 weeks prior to their 2-year follow-up interview. CONCLUSIONS: Injured workers treated through managed care, based upon an occupational-medicine model, appear to experience similar long-term health and employment outcomes as workers treated through traditional FFS.

The Kaiser Family Foundation Community Health Promotion Grants Program: findings from an outcome evaluation.

OBJECTIVES: To present results from an outcome evaluation of the Henry J. Kaiser Family Foundation's Community Health Promotion Grants Program (CHPGP) in the West, which represented a major community-based initiative designed to promote improved health by changing community norms, environmental conditions, and individual behavior in 11 western communities. METHODS: The evaluation design: 14 randomly assigned intervention and control communities, 4 intervention communities selected on special merit, and 4 matched controls. Data for the outcome evaluation were obtained from surveys, administered every two years at three points in time, of community leaders and representative adults and adolescents, and from specially designed surveys of grocery stores. Outcomes for each of the 11 intervention communities were compared with outcomes in control communities. RESULTS: With the exception of two intervention communities-a largely Hispanic community and a Native American reservation-we found little evidence of positive changes in the outcomes targeted by the 11 intervention communities. The programs that demonstrated positive outcomes targeted dietary behavior and adolescent substance abuse. CONCLUSIONS: Improvement of health through community-based interventions remains a critical public health challenge. The CHPGP, like other prominent community-based initiatives, generally failed to produce measurable changes in the targeted health outcomes. Efforts should focus on developing theories and methods that can improve the design and evaluation of community-based interventions.

Age gradient in the cost-effectiveness of bicycle helmets.

OBJECTIVES: This study analyzed the reduction in risk of head injuries associated with use of bicycle helmets among persons ages 3 to 70 and the cost-effectiveness of helmet use based on this estimated risk reduction. METHODS: To derive our cost-effectiveness estimates, we combined injury incidence data gathered through a detailed and comprehensive injury registration system in Norway, acute medical treatment cost information for the Norwegian health service, and information reported in the scientific literature regarding the health protective effects of helmet use. The analysis included all cases of head injuries reported through the registration system from 1990 through 1996. We performed an age-stratified analysis to determine the incidence of bicycle-related head injuries, the 5-year reduction in absolute risk of injury, the number needed to treat, and the cost-effectiveness of helmet use. To test the robustness of the findings to parameter assumptions, we performed sensitivity analysis. RESULTS: The risk of head injury was highest among children aged 5 to 16. The greatest reduction in absolute risk of head injury, 1.0 to 1.4% over 5 years estimated helmet lifetime, occurred among children who started using a helmet between the ages of 3 and 13. Estimates indicate that it would cost approximately U.S. $2,200 in bicycle helmet expenses to prevent any one upper head injury in children ages 3-13. In contrast, it would cost U.S. $10,000-25,000 to avoid a single injury among adults. CONCLUSIONS: Bicycle safety helmets appear to be several times more cost-effective for children than adults, primarily because of the higher risk of head injury among children. Programs aiming to increase helmet use should consider the differences in injury risk and cost-effectiveness among different age groups and target their efforts accordingly.

The impact of utilization management on readmissions among patients with cardiovascular disease.

OBJECTIVE: To determine if prospective utilization reviews that lead to reduced hospital length of stay (LOS) relative to days requested by an attending physician affect the likelihood of readmission for privately insured patients with cardiovascular disease. DATA SOURCES: Data obtained from a private insurance company on utilization management decisions from 1989 through 1993. During this five-year period, 39,117 inpatient reviews were conducted, 4,326 (11.1 percent) on patients with cardiovascular disease. We selected for analysis all 4,326 reviews performed on patients with cardiovascular disease. STUDY DESIGN: We used proportional hazard analysis (Cox regression) to investigate the relationship between LOS reductions relative to days requested by a patient's attending physician and the likelihood of readmission within 60 days of discharge. Separate analyses were performed for medical and procedural admissions. PRINCIPAL FINDINGS: There were 2,813 requests for medical admission, and 1,513 requests for procedural admission. Requests for admission were rarely denied. Length of stay was reduced relative to that requested by the treating physician for 17 percent and 19 percent of medical and procedural admissions, respectively. Cumulative 60-day readmission rates were 9.5 percent for medical admissions and 12.3 percent for procedural admissions. We found no relationship between LOS reduction and the likelihood of readmission for medical admissions. However, patients admitted for procedures who had their length of stay reduced by two or more days were 2.6 times as likely to be readmitted within 60 days as those who had no reduction in their length of stay (95% CI: 1.3-5.1; p < .005). CONCLUSIONS: Utilization management (UM) rarely denies requests for inpatient treatment of cardiovascular disease. The association between LOS reduction and the likelihood of readmission for patients admitted for cardiovascular procedures raises concern that UM may adversely affect clinical outcome for some patients. Further research is needed to definitively elucidate any relationship that might exist between utilization review decisions and quality of care.

Employment outcomes among AFDC recipients treated for substance abuse in Washington State.

In 1996, Congress passed sweeping welfare reform, abolishing the Aid to Families with Dependent Children (AFDC) program. Each state now administers its own welfare-to-work program under broad federal guidelines, which require eligible adult recipients to work or perform community service. High-risk welfare recipients, especially those with chemical dependency problems, face significant obstacles in their efforts to achieve greater self-sufficiency under the new welfare-to-work programs. State databases were used to track employment outcomes for AFDC clients admitted to treatment for chemical dependency in Washington State during a two-year period. Exposure to treatment was associated with a greater likelihood of becoming employed and with increased earnings for those who became employed. Ensuring that welfare recipients with substance abuse problems have access to appropriate treatment and vocational services is critical if welfare-to-work programs are to promote greater economic self-sufficiency.

Evaluation of the Washington State Workers' Compensation Managed Care Pilot Project I: medical outcomes and patient satisfaction.

OBJECTIVES: This study examined the effect of managed care on medical outcomes and patient satisfaction as part of an evaluation of the Washington State Workers' Compensation Managed Care Pilot. METHODS: One hundred twenty firms (7,041 employees) agreed to have their injured workers treated in managed-care plans. Managed care introduced two changes from the fee-for-service (FFS) delivery system currently used by injured workers in Washington State: (1) experience-rated capitation, and (2) a primary occupational-medicine delivery model. The FFS control group included injured workers employed at 392 firms (12,000 employees). A total of 1,313 workers who experienced occupationally related injuries or illnesses between April 1995 and June 1996 were interviewed by telephone at 6 weeks after injury regarding their medical outcomes and satisfaction with care. Workers whose injuries resulted in four or more lost workdays (n = 372) were also interviewed at 6 months after injury on the same topics. The areas surveyed included functional outcomes and satisfaction with care, providers, and access to providers. RESULTS: The measures of functional outcome reflected no consistent differences between the managed care and the FFS conditions. The workers who attended the managed-care system reported lower levels of satisfaction with care, particularly with access to providers. For example, 58% of managed-care patients reported satisfaction with their attending physician as compared with 69% of FFS patients (P<0.01). CONCLUSIONS: Workers treated through managed-care arrangements were less satisfied with their care, but their medical outcomes were similar to those of workers who received traditional FFS care. The current workers' compensation system in Washington State affords injured workers great latitude in choosing providers. If provider choice is substantially restricted by managed care, worker satisfaction is likely to diminish.

Evaluation of the Washington State Workers' Compensation Managed Care Pilot Project II: medical and disability costs.

OBJECTIVES: This study examined the effect of managed care on medical and disability costs as part of an evaluation of the Washington State Workers' Compensation Managed Care Pilot (MCP). METHODS: One hundred twenty firms (7,041 employees) agreed to have their injured workers treated in managed care plans. Managed care introduced two changes from the fee-for-service (FFS) delivery system currently used by injured workers in Washington State: experience- rated capitation and a primary occupational medicine delivery network. The FFS control group included injured workers employed at 392 firms (12,000 employees). Medical and disability costs were compared for 1,058 injuries in the managed care group and 1,159 injuries in the FFS group occurring between April 1995 and June 1996. Univariate and multivariate statistical methods were used to analyze the effects of managed care on medical and disability costs. RESULTS: The mean unadjusted medical cost per injury ($587) for the managed care group was 21.5% lower (P = 0.06) than for the FFS group ($748). Adjustment for differences in worker and firm-level characteristics through multivariate analysis had little effect on the unadjusted results, except that the difference in costs between managed care and FFS groups became statistically significant (P<0.01). The major cost differences were for outpatient surgery (cost per surgery) and ancillary services (pharmacy, x-ray, physical therapy, and all other costs). In addition, disability costs, particularly percent on time loss and time-loss cost per injury, were significantly lower (P<0.01) in the managed care group. CONCLUSIONS: The results from the MCP suggest that substantial savings in workers' compensation medical and disability costs may be realized using the type of managed care intervention designed for this study. Delivering occupational health services through managed care arrangements whose design is based on an integrated, occupational health-centered delivery model may offer a viable approach for improving delivery systems, reducing costs and encouraging greater attention to disability prevention.

Effects of health care cost-containment programs on patterns of care and readmissions among children and adolescents.

OBJECTIVES: This study examined the effects of a utilization management program on patterns of medical care among children and adolescents. METHODS: From 1989 through 1993, the program conducted 8568 reviews of pediatric patients, ranging in age from birth to 18 years. The program used preadmission and concurrent review procedures to review and certify patients' need for care. This study used multivariate analyses to assess changes in the number of days of inpatient care approved by the program and to determine whether limitations imposed on length of stay affected the risk of 60-day readmission. RESULTS: Concurrent review reduced the number of requested days of inpatient care by 3.2 days per patient. Low-birthweight infants and adolescent patients with depression or alcohol or drug dependence accounted for a disproportionate share of the reduction. Patients classified as admitted for medical or mental health care and whose stay was restricted by concurrent review were more likely (P < .05) to be readmitted within 60 days after discharge. CONCLUSIONS: By limiting care through its review procedures, the utilization management program decreased inpatient resource consumption but also increased the risk of readmission for some patients. Continued investigation should be conducted of the effects of cost-containment programs on the quality of care given to children and adolescents, especially in the area of mental health.

Controlling workers' compensation medical care use and costs through utilization management.

Little is known about the performance of utilization management (UM) programs, which are now widely used within the workers' compensation system to contain medical costs and improve quality. UM programs focus largely on hospital care and rely on preadmission and concurrent reviews to authorize hospital admissions and continued stays. We obtained data from a large UM program representing a national sample of 9319 workers' compensation patients whose medical care was reviewed between 1991 and 1993. We analyzed these data to determine the denial rate for hospital admission and outpatient surgery and the frequency of length-of-stay restrictions among hospitalized patients. The denial rate was approximately 2% to 3% overall, but many of the denials were later reversed. On average, the UM program reduced the length of stay by 1.9 days relative to the number of days of care requested. The estimated gross cost savings resulting from reduced hospitalization time and decreased outpatient care was approximately $5 million. UM programs may offer a viable approach to cost containment within the workers' compensation system. Their value as a tool to improve the quality of care for workers' compensation patients remains to be demonstrated.

Effects of utilization management on patterns of hospital care among privately insured adult patients.

OBJECTIVES: This study examined the effects of utilization management review activities on patterns of hospital care among a sample of adult patients insured through a managed fee-for-service plan. METHODS: The study was a retrospective analysis of insurance administrative data representing a case series of patients for whom utilization management review was performed. Two review activities were analyzed: pre-admission review and concurrent (continued stay) review. Patients were 49,654 privately insured adult patients reviewed for care between January 1989 and December 1993. Review outcomes included inpatient or outpatient care denied, site of treatment shifted (from inpatient to outpatient), or reduction in requested hospital days (total days requested - total days approved). RESULTS: Few patients (<1%) were denied care at time of admission or were required to obtain outpatient instead of inpatient care. More common was action taken to limit length of stay by concurrent review, which accounted for 83% of the total reduction (25,197 requested days) in inpatient care. Utilization management became more restrictive with time: the number of days approved declined by 15% to 50% from 1990 to 1993, depending on the type of admission. Utilization management was most forceful in restricting care for mental health patients, who represented 5.7% of the study population but accounted for 54.7% of the total reduction in requested days. CONCLUSIONS: The utilization management program appeared to limit hospital care by managing length of stay once patients were admitted. The effects of restricting length of stay in this manner on quality and health outcomes should be investigated.

Fractures among children: incidence and impact on daily activities.

OBJECTIVES: The study's objective was to examine incidence of fractures and associated activity restriction among children aged 0-12 years. DESIGN: Injuries were prospectively recorded over the four year period from 1992-95 in a cohort of children aged 0-12 years, representing 193,540 children years. Information about length and extent of activity restriction was collected from parents by a mailed questionnaire for a subsample of 192 children with a fracture. RESULTS: A total of 2477 fractures occurred in the study population (128 per 10,000 children annually). The incidence increased linearly with age, by 14 cases per 10,000 children year for each year of age. Boys and girls showed similar patterns of fracture occurrence. There was a significant difference in length of activity restrictions for different types of fractures. The mean and 95% confidence interval (CI) of activity restricted days for leg fractures were 26 (95% CI 7 to 45) days, for arm fractures, 14 (95% CI 8 to 20) days, and for other fractures, 5 (95% CI 1 to 8) days. Arm fractures represented 66% of the cases and 62% of the activity restricted days; leg fractures 19% of cases and 33% of all activity restricted days; and other fractures 16% of the cases but only 5% of the activity restricted days in this population. CONCLUSION: The incidence of fractures increases in childhood. Different types of fractures among children cause different amounts of activity restriction.

Do treatment restrictions imposed by utilization management increase the likelihood of readmission for psychiatric patients?

OBJECTIVES: The use of utilization management as a cost-containment strategy has led to debate and controversy within the field of mental health. Little is currently known about how this cost-containment approach affects patient care or quality. The aim of this investigation was to determine whether treatment restrictions imposed on privately insured psychiatric patients by a utilization management program affected the likelihood of readmission. METHODS: The utilization management program included three review activities: preadmission certification, concurrent review, and case management. During a 5-year period (1989-1993), 3,073 inpatient reviews were performed on 2,443 privately insured psychiatric patients. Using logistic regression, restrictions imposed by utilization management on length-of-stay in relation to 60-day readmission rates were investigated. RESULTS: The most common diagnoses among the psychiatric patients whose care was reviewed were alcohol dependence (22.9%), recurrent depression (22.5%), and single-event depression (20.8%). On average, 22.4 days of inpatient psychiatric treatment was requested through the review procedures, and 15.5 days of care were approved by the utilization management program. Of the 2,443 patients reviewed, 7.9% had a readmission within 60 days of their initial admission. Patients whose length-of-stay was restricted by utilization management were more likely to be readmitted. For each day that the requested length-of-stay was reduced, the adjusted odds of readmission within 60 days increased by 3.1% (P = 0.004). CONCLUSIONS: The utilization management program restricted access to inpatient psychiatric care by limiting length of stay. Although this approach may promote cost containment, it also appears to increase the risk of early readmission. Continuing attention should be paid to investigating the effects on quality of utilization management programs aimed at containing mental health costs.

Does competition by health maintenance organizations affect the adoption of cost-containment measures by fee-for-service plans?

How groups insured by fee-for-service health plans react to increased competition from health maintenance organizations (HMOs) is an unresolved question. We investigated whether groups insured by indemnity plans respond to HMO market competition by changing selected health insurance features, such as deductible amounts, stop loss levels, and coinsurance rates, or by adopting utilization management or preferred provider organization (PPO) benefit options. We collected benefit design data for the years 1985 through 1992 from 95 insured groups in 62 US metropolitan statistical areas. Multivariate hazard analysis showed that groups located in markets with higher rates of change in HMO enrollment were less likely to increase deductibles or stop loss levels. Groups located in markets with higher HMO enrollment were more likely to adopt utilization management or PPO benefit options. A group located in a market with an HMO penetration rate of 20% was 65% more likely to have included a PPO option as part of its insurance benefit plan than a group located in a market with an HMO penetration rate of 15% (p < 0.05). Concern about possible adverse selection effects may deter some fee-for-service groups from changing their health insurance coverage. Under some conditions, however, groups insured under fee-for-service plans do respond to managed care competition by changing their insurance benefits to achieve greater cost containment.

Implementation of the Henry J. Kaiser Family Foundation's Community Health Promotion Grant Program: a process evaluation.

The Community Health Promotion Grants Program, sponsored by the Henry J. Kaiser Family Foundation, represents a major health initiative that established 11 community health promotion projects. Successful implementation was characterized by several critical factors: (1) intervention activities; (2) community activation; (3) success in obtaining external funding; and (4) institutionalization. Analysis of the program was based on data from several sources: program reports, key informant surveys, and a community coalition survey. Results indicate that school-based programs focusing on adolescent health problems were the most successful in reaching the populations they were targeting. The majority of the programs were able to attract external funding, thereby adding to their initial resource base. The programs were less successful in generating health promotion activities and in achieving meaningful institutionalization in their communities.

Changes in benefit payments and health insurance premiums among firms switching health insurance carriers.

Employer-purchased group health insurance is a major source of funding in the US healthcare system, accounting for approximately one third of each healthcare dollar spent. Surprisingly, little is known about employers' behavior in purchasing health insurance or the circumstances leading employers to switch health insurance carriers. We descriptively analyzed data for a cohort of 95 insured groups between 1985 and 1991 to determine the frequency with which employers switch health insurance carriers and the growth pattern in premiums and benefit payments before the switch was made. Thirty-seven percent of groups switched carriers during the study period, with at least five groups switching each year from 1987 through 1991. The groups that switched insurance carriers experienced higher average annual rates of growth in benefit payments than those that did not switch (18% versus 11%). Groups that switched did not have significantly higher observed premium growth rates than those that did not switch, suggesting that employers decided to switch insurers before absorbing an increase in premiums. However, some firms that switched experienced below average increases in both benefit payments and premiums, indicating that premiums and anticipated premium increases are not solely responsible for the decision to switch health insurance carriers.

The contribution of infectious diseases to infant mortality in Alaska.

BACKGROUND: Based on death certificates to determine cause of death, current research suggests that infectious diseases are less important causes of infant mortality than in the past. METHODS: To determine the contribution of infectious diseases to infant mortality and the sensitivity of death certificates for identifying infectious disease causes of death, we examined information from multiple sources for a population-based sample of infant deaths that occurred in Alaska during 1992 through 1994. RESULTS: We collected information for 181 of 272 reported infant deaths and identified 48 infants for whom an infection was a primary (n = 15), contributing (n = 12) or suspected (n = 21) cause of death (infectious disease-related infant mortality rate, 2.2/1000 live births). Of these 48 deaths 27 were associated with a maternal peripartum infection and 15 were associated with a postneonatal respiratory tract infection. A specific organism was identified for 15 of 29 infants who died during the neonatal period and for 5 of 19 infants who died during the postneonatal period (including 2 with coagulase-negative Staphylococcus and the rest with a variety of other organisms). Death certificates identified an infectious disease as a primary or contributing cause of death for 19 infants (sensitivity, 40%) and reported a specific organism for 4 infants. CONCLUSIONS: Infectious diseases caused or contributed to a high proportion of infant mortality in Alaska during 1992 through 1994. Death certificates had poor sensitivity for identifying infectious disease-related infant deaths.

Population-based study of unintentional injuries in the home.

There is little current understanding of the risk for occurrence of unintentional injury in the home. The authors estimated the incidence of unintentional home injuries for an entire community, adjusting for actual time spent awake in the home and, in addition, analyzed the costs of these injuries. Cases of unintentional home injuries occurring from 1990 to 1993 among the residents of Stavanger, Norway (approximately 100,000 population) were identified through a prospective, ongoing injury registration system. Age- and sex-specific per-population incidence and incidence per time spent awake at home were estimated. Time exposure data for adults were obtained from the Norwegian Time Budget Survey and were estimated directly for children. The cost of injuries was estimated based on a random sample of 289 patients. A total of 8,580 persons received medical treatment for unintentional injuries in the home (22.0 per 1,000 population annually, 71.9 per 10 million hours awake at home). The per-population incidence was highest among children age 6 years or younger and among people aged 65 or older (51.0 and 32.7 respectively, per 1,000 population annually). The high population incidence for children was not accounted for by time spent awake at home. For people aged 65-74 years, however, increased incidence was primarily a function of greater time spent awake at home. For persons aged 75 years or older, the high population incidence was due to both high exposure-adjusted incidence and greater time spent awake at home. The male-female ratio of age-standardized per-population incidence was 1.07 (95% confidence interval 1.04-1.10), and the ratio of age-standardized exposure-adjusted incidence was 1.22 (95% confidence interval 1.17-1.28). The estimated cost (direct and indirect) per injury was $1,300 during the first year after injury. Persons aged 75 years or older accounted for 12% of the injuries but 50% of the total medical costs.

Access to war weapons and injury prevention activities among children in Croatia.

To investigate the exposure of children in Croatia to war weapons, we surveyed random samples of children (n=986) aged 11 to 16 years and of parents (1469) of children aged 7 to 16 years in April 1994 in four war-affected districts in Croatia. The children's survey indicated that 57% of the boys and 36% of the girls had access to weapons at home, at some other place, or at both. Eighteen percent of the boys and 5% of the girls reported playing with weapons. The parents' survey showed that 68% of the households possessed weapons, with 19% of the children having access to weapons at home. Influenced by preliminary findings of these surveys, the Croatian government modified its national campaign (one partially supported by international aid) to prevent war-related injuries among children. This study demonstrates the feasibility of scientific evaluation of humanitarian aid programs.

Home injuries among adults in Stavanger, Norway.

Norwegian injury register data were analyzed to examine unintentional home injuries among persons ages 25 to 64 years residing in Stavanger, Norway, during 1992. A total of 782 persons received medical treatment for injury during 1992 (15.4 per 1000 population). The incidence was similar for males and females (15.8 and 14.9 per 1000 population); however, the exposure-specific injury rate was significantly higher for males (6.0 vs 4.1 per 1 million person-hours). This difference was entirely due to the much higher injury rate among males aged 25 to 44 years. The estimated first year cost (direct and indirect) per injury was $2700. Home injuries among adults appear to be an overlooked public health problem that warrants increased attention.