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PubMed1997

Interpreting energy expenditure for anaerobic exercise and recovery: an anaerobic hypothesis.

Energy expenditure during and after exercise is composed of aerobic and anaerobic bioenergetics and the energy demands of aerobic recovery. Current attempts to measure energy expenditure include an exercise oxygen uptake + oxygen debt (EPOC) measurement or, an oxygen deficit + exercise oxygen uptake measurement. This investigation illustrates how oxygen debt and oxygen deficit interpretation can effect a total energy expenditure measurement. It was hypothesized that the total energy expenditure for several intermittent bouts of exercise and recovery would be greater than for one bout of continuous exercise and recovery when equivalent work was compared. Exercise was performed under low-intensity and high-intensity conditions. Both oxygen debt and oxygen deficit methodology resulted in similar energy expenditure measurements for both intermittent and continuous exercise. This implies little to no recovery energy demand or considerable methodology errors. Differences in total energy expenditure were found when the oxygen deficit and parts of the oxygen debt (EPOC) were considered separate and independent (p < 0.05). These differences can be accounted for when the data are interpreted utilizing thermodynamic (2nd law) and engineering (in-series efficiency) concepts rather than the heat equivalent of carbohydrate oxidation (20.9 kJ equals one liter of O2). It is suggested that while oxygen uptake provides an excellent representation of aerobic metabolism during exercise and recovery, oxygen uptake may be an inadequate measure of the energetics of lactate production (fermentation). In application, energy expenditure differences appear realistic only for high-intensity, intermittent exercise rather than lower intensity exercise.

Adenosine Triphosphate↗
PubMed2005

A national profile of health care utilization and expenditures for children with special health care needs.

OBJECTIVES: To provide the first nationally representative data on total health care expenses, out-of-pocket health care expenses, and information on the extent to which out-of-pocket expenses are financially burdensome for families of children with special health care needs (CSHCN). To also compare utilization and expenditure patterns for children with and without special health care needs. DESIGN: We used data from the 2000 Medical Expenditure Panel Survey (MEPS). We present univariate, bivariate, and multivariate statistics on utilization and expenditures adjusted for the complex sample design. PARTICIPANTS: The 2000 MEPS data set contains 6965 children younger than 18 years. Using the CSHCN definition adopted by the federal Maternal and Child Health Bureau and operationalized using the CSHCN Screener, 949 children (15.6%) were identified as children with special health care needs. MAIN OUTCOME MEASURES: Compared with other children, CSHCN had 3 times higher health care expenditures (2099 dollars vs 628 dollars; P<.01). The 15.6% of CSHCN accounted for 42.1% of total medical care costs (excluding dental costs) and 33.6% of total health care costs (including dental costs) attributed to children in 2000. Families of CSHCN were best protected against inpatient hospital care expenses and most exposed to dental care expenses. Families of CSHCN experiencing high out-of-pocket expenses (exceeding 5% of family income) were approximately 11 times more likely to be from households with incomes below 200% of the federal poverty level (odds ratio, 10.9; 95% confidence interval, 3.55-33.76) than to be from families with incomes at or above 400% of the federal poverty level. CONCLUSIONS: Families with CSHCN experience much higher expenditures, including out-of-pocket expenditures, than other children. Insurance plays an important protective role for families of CSHCN, but it still provides incomplete protection. Health policy changes that would extend the breadth and depth of insurance coverage are needed to ensure that all families of CSHCN are protected against burdensome expenses.

Adolescent↗
PubMed2005

Disparities in the financial burden of children's healthcare expenditures.

OBJECTIVE: To examine whether income-related disparities in the burden of children's out-of-pocket health care expenditures have diminished with the expansions in public insurance for children in low-income families. DESIGN: We compared absolute financial burden (out-of-pocket expenditures per child) and relative financial burden (out-of-pocket expenditures per child as a proportion of family income) among children aged 0 to 18 years in 6 poverty level groups using the 1980 National Medical Care Utilization and Expenditure Survey and the 2000 Medical Expenditure Panel Survey. Regression models were used to assess whether disparities in financial burden diminished between 1980 and 2000. RESULTS: There were significant reductions (P<.01) in absolute burden over time for children above 200% of the federal poverty level. Relative financial burden decreased significantly (P<.01) for all of the income groups, ranging from a reduction of 36.49% for those below 100% of the federal poverty level (95% CI, -49.54% to -20.07%) to a reduction of 46.69% for those at or above 300% of the federal poverty level (95% CI, -54.43% to -37.62%). For low-income children, relative financial burden was 49.49% less with public insurance (95% CI, -66.24% to -24.35%) and 79.14% greater with private insurance (95% CI, 9.31% to 193.59%) than relative financial burden for low-income children without insurance. CONCLUSIONS: While the financial burden of children's out-of-pocket health care expenditures has decreased for all of the income groups over time, socioeconomic disparities persist. However, public insurance coverage appears to mitigate the financial burden for low-income children.

Adolescent↗
PubMed2001

Influence of age on Medicare expenditures and medical care in the last year of life.

CONTEXT: Expenditures for Medicare beneficiaries in the last year of life decrease with increasing age. The cause of this phenomenon is uncertain. OBJECTIVES: To examine this pattern in detail and evaluate whether decreases in aggressiveness of medical care explain the phenomenon. DESIGN, SETTING, AND PATIENTS: Analysis of sample Medicare data for beneficiaries aged 65 years or older from Massachusetts (n = 34 131) and California (n = 19 064) who died in 1996. MAIN OUTCOME MEASURE: Medical expenditures during the last year of life, analyzed by age group, sex, race, place and cause of death, comorbidity, and use of hospital services. RESULTS: For Massachusetts and California, respectively, Medicare expenditures per beneficiary were $35 300 and $27 800 among those aged 65 through 74 years vs $22 000 and $21 600 for those aged 85 years or older. The pattern of decreasing Medicare expenditures with age is pervasive, persisting throughout the last year of life in both states for both sexes, for black and white beneficiaries, for persons with varying levels of comorbidity, and for those receiving hospice vs conventional care, regardless of cause and site of death. The aggressiveness of medical care in both Massachusetts and California also decreased with age, as judged by less frequent hospital and intensive care unit admissions and by markedly decreasing use of cardiac catheterization, dialysis, ventilators, and pulmonary artery monitors, regardless of cause of death. Decrease in the cost of hospital services accounts for approximately 80% of the decrease in Medicare expenditures with age in both states. CONCLUSIONS: Medicare expenditures in the last year of life decrease with age, especially for those aged 85 years or older. This is in large part because the aggressiveness of medical care in the last year of life decreases with increasing age.

Age Factors↗
PubMed1993

The impact of aging on health care expenditure in Sweden.

This study measures the impact of aging on health care expenditure in Sweden in 1970-1985 and the projected impact for 1985-2005. In addition, the distribution of health care expenditure over different age groups is analysed. The study shows that changes in population aging account for barely 13% of the total increase in health care expenditure during the period 1970-1985, and that is the combined effect of changes in population aging plus the faster increase in health care expenditure per capita in older age groups that governs the development of an increasing concentration of health care expenditure to older age groups. During the period 1976-1985 the per capita health care expenditure increased modestly for the ages 0-74, but 54% for persons older than 74 years.

Age Factors↗
PubMed1986

Health care expenditures in a rural Indian community.

Financing health services is an increasing concern that looms as one of the major obstacles to achieving an equitable distribution of primary health care in developing communities. An important step in solving this problem is the assessment of current levels of health care expenditures in these communities in order to determine the extent to which local resources are being used for these purposes. Ways to maximize the effectiveness of these resources can then be sought. Village level studies carried out between 1968 and 1974 in Punjab, India, revealed that at least 80% of all health care expenditures in this rural area were for services of traditional practitioners or private 'modern' doctors. This paper explores various aspects of these expenditures including the source of services and the effect of individual characteristics such as caste on the amount spent on health care. Out-of-pocket expenditures are contrasted to expenditures in the government system. Assessment of the impact of 'free' village level primary care services in this setting revealed that the poor reduced their expenditures on health care more than the wealthy, but both groups took almost equal advantage of the 'free' services. The results raise the possibility of mobilizing some of the savings accruing to the community to help support the 'free' services as well as the potential of encouraging private traditional and modern practitioners to cooperate in achieving primary health care goals.

Developing Countries↗
PubMed2003

Household catastrophic health expenditure: a multicountry analysis.

BACKGROUND: Health policy makers have long been concerned with protecting people from the possibility that ill health will lead to catastrophic financial payments and subsequent impoverishment. Yet catastrophic expenditure is not rare. We investigated the extent of catastrophic health expenditure as a first step to developing appropriate policy responses. METHODS: We used a cross-country analysis design. Data from household surveys in 59 countries were used to explore, by regression analysis, variables associated with catastrophic health expenditure. We defined expenditure as being catastrophic if a household's financial contributions to the health system exceed 40% of income remaining after subsistence needs have been met. FINDINGS: The proportion of households facing catastrophic payments from out-of-pocket health expenses varied widely between countries. Catastrophic spending rates were highest in some countries in transition, and in certain Latin American countries. Three key preconditions for catastrophic payments were identified: the availability of health services requiring payment, low capacity to pay, and the lack of prepayment or health insurance. INTERPRETATION: People, particularly in poor households, can be protected from catastrophic health expenditures by reducing a health system's reliance on out-of-pocket payments and providing more financial risk protection. Increase in the availability of health services is critical to improving health in poor countries, but this approach could raise the proportion of households facing catastrophic expenditure; risk protection policies would be especially important in this situation.

Catastrophic Illness↗
PubMed1997

The effect of HMOs on fee-for-service health care expenditures: evidence from Medicare.

This paper examines the relationship between HMO market share and fee-for-service health care expenditures using 1986-1990 county- and metropolitan statistical area-level data on Medicare expenditures and HMO market share. Fixed-effects estimates imply that fee-for-service expenditures are concave and decreasing in market share. Increases in market share from 20% to 30% are associated with 3-7% expenditure reductions. Instrumental variable estimates that exploit cross-sectional variation in HMO activity also indicate a concave relationship, with expenditures declining in market share for market shares above 15-18%, but imply larger expenditure responses to market share changes.

Catchment Area, Health↗
PubMedDate not supplied

[Identification of doctors with high pharmaceutical expenditure].

OBJECTIVE: [corrected] To identify doctors with high pharmaceutical expenditure through multiple regression of variables not exclusively dependent on the doctor's decision. To compare the agreement with the method of the Spanish national health servicem which only considered the percentage of pensioners of the doctor's list. METHODS: Cross-sectional, retrospective, descriptive study of the pharmaceutical expenditure of 220 general practitioners in the health district of Toledo (Spain) in 1999. The following variables were collected: pharmaceutical expenditure for policy-holder/month (PEP-H); age; sex; habitat; size of the list; percentage of pensioners; frequency of attendance (consults/policy-holder-year) and workload (consultations per day). A multiple regression model with backwards elimination was constructed, taking like PEP-H as the dependent variable and the remaining as the independent variables. The resultant equation enabled calculation of the expected PEP-H for each doctor and the deviation of their real expenditure ofrom the expected. Doctors were considered to have high pharmaceutical expenditure when the deviation was more than the mean plus 1 standard deviation of this distribution. RESULTS: The mean PEP-H was 2,584.4 pesetas. Differences were found (F = 11.665; p < 0.005) in PEP-H per habitat (2,723.2 in rural, 2,521.4 in semi urban and 2,168.2 in urban). A significant correlation was found (p < 0.005) between PEP-H and percentage of pensioners (r = 0.728) and frequency of attendance (r = 0.607). Our final model included percentage of pensioners, frequency of attendance, and age (F = 102.33; p < 0.005; r = 0.767; r² = 0.588; β = 206.05; β₁ = 48.27; β₂ = 61.26; β₃ = 9.55). This model were identified 25 DHPC. With the INSALUD model the identification were of 31. The Kappa index showed that agreement between both methods was 0.706 (SE 0.056) and simple disagreement was found in the classification of 24 doctors (10.9%). CONCLUSIONS: Frequency of attendance and the percentage of pensioners on doctors' lists are iclosely related to PEP-H. The indicator currently used by the Spanish national health system to identify doctors with high pharmaceutical expenditure could be improved if other variables, such as frenquency of attendance and the doctors' age, were taken into account. The adoption of this method would make budget allocation more impartial and fair.

Cross-Sectional Studies↗
PubMed1998

Abdominal adhesiolysis: inpatient care and expenditures in the United States in 1994.

BACKGROUND: Adhesion formation represents a major complication after lower abdominal operations. It is postulated that a shift in surgical practice in recent years toward the use of less invasive techniques, such as laparoscopy, may be associated with a reduction in the incidence of intraperitoneal adhesions and in the rate of adhesiolysis procedures. Using an attributable-risk methodology, this cost-of-illness study was designed to estimate the hospitalization rate and expenditures for adhesiolysis in the United States in 1994 and to examine changes in attributable expenditures since 1988. STUDY DESIGN: A national hospital discharge data base was used to identify all abdominal adhesion procedures performed in the United States in 1994. Total hospitalization expenditures were based on Medicare payment rates for adhesiolysis hospitalizations and physician services, which were applied to the total number of inpatient days attributed to adhesiolysis. The results were compared with published rates and expenditures attributed to adhesiolysis in 1988. RESULTS: Adhesiolysis was responsible for 303,836 hospitalizations during 1994, primarily for procedures on the digestive and female reproductive systems. These procedures accounted for 846,415 days of inpatient care and $1.3 billion in hospitalization and surgeon expenditures. CONCLUSIONS: Although the adhesiolysis hospitalization rate has remained constant since 1988, inpatient expenditures have decreased by nearly 10% because of a 15% decrease in the average length of stay. The increased use of laparoscopy during this 6-year period does not appear to be associated with a concomitant reduction in the adhesiolysis hospitalization rate, suggesting that the causes of adhesion formation warrant further research.

Abdomen↗
PubMed2001

A pilot study of expenditures on, and utilization of resources in, health care in adults with congenital heart disease.

BACKGROUND: Congenital cardiac disease may be a chronic condition, necessitating life-long follow-up for a substantial proportion of the patients. Such patients, therefore, are often presumed to be high users of resources for health care. Information on utilization of resources in adults with congenital heart disease, however, is scarce. METHODS: This retrospective pilot study, performed in Belgium, investigated 192 adults with congenital heart disease to measure the annual expenditures and utilization of health care and compared the findings with data from the general population. We also sought to explore demographic and clinical parameters as predictors for the expenditures. RESULTS: Hospitalization was documented in 20.3% of the patients, with a median length of stay of 5 days. The overall payment by health insurance associations in 1997 was 1794.5 ECU per patient, while patients paid on average 189.5 ECU out-of-pocket. For medication, the average reimbursement and out-of-pocket expenses were estimated at 78 ECU and 20 ECU, respectively. Expenditures for patients with congenital heart disease were considerably higher than the age and gender-corrected expenditures for the general population (411.7 ECU), though this difference was accounted for by only one-eighth of the cohort of those with congenital heart disease. In general, higher expenditures were associated with abnormal left ventricular end-diastolic diameter, female gender, functional impairment and higher age, although the explained variance was limited. CONCLUSION: Our study has provided pilot data on the economic outcomes for patients with congenital heart diseases. We have identified parameters that could predict expenditure, but which will have to be examined in future research. This is needed to develop guidelines for health insurance for those with congenital heart diseases.

Adult↗
PubMed2004

Multiple prior years of health expenditures and Medicare health plan choice.

This study examines the effect of multiple prior years of health expenditures on the probability of enrollment in a Medicare HMO. Beneficiaries may require more than one year of prior expenditure data to form a reliable estimate of future expenditures if health expenditures have a significant transitory component. We used a logit model to estimate the influence of 1991-1993 Part A expenditures and demographic data on the choice of health plans in 1994. The results indicate that beneficiaries use multiple years of expenditures in their choice of health plan and the effect of prior spending declined with time.

Aged↗
PubMed2001

Extent and sources of geographic variation in Medicare end-stage renal disease expenditures.

Geographic variations in practices and expenditures have been widely documented, leading to concerns that care in some regions is clinically suboptimal and/or economically inefficient. Our objectives are to determine the extent and sources of geographic variation in Medicare expenditures per patient with end-stage renal disease (ESRD) per year. The study population included all patients with ESRD with Medicare as primary payer during 1997 (n = 284,670). Medicare expenditures were summarized at the hospital referral region (HRR) level. Using regression analysis, we estimated the relationship between expenditures and demographics, case mix, dialysis provider characteristics, distribution of patients across renal replacement therapy modalities, standardized hospitalization ratios, and healthcare wages. Spending per patient-year varied threefold across HRRs, ranging from $17,791 to $59,025 (mean, $38,966 +/- $6,774 [SD]). The regression equation explained 80% of this variation. Although several demographic and case-mix indicators that have been related to spending at the individual level were statistically significant predictors of spending at the HRR level, they did not show enough geographic variation to explain a large fraction of spending variation. Rather, patient distributions across renal replacement modalities, hospitalization patterns, and healthcare wages were the most powerful predictors of spending. Compared with Medicare generally, both the mean and SD of ESRD expenditures were approximately seven times larger. The substantial geographic variability in expenditures for patients with ESRD indicates the potential for improving efficiency and quality of care. Interventions designed to increase transplantation rates, ensure access to peritoneal dialysis, and reduce hospitalization appear most promising.

Demography↗
PubMed1989

The effect of prospective payment on Medicare expenditures.

Medicare's prospective payment system was introduced in 1983 to slow the growth of expenditures for hospital care, which from the bulk of Medicare costs. Instead of reimbursing hospitals for the actual costs of patient care, the system pays them at fixed rates for each admission. In this study, we estimated the savings to Medicare from the use of prospective payment. We analyzed the expenditure projections published in 10 successive annual reports (1979 to 1988) by the trustees of the federal Hospital Insurance Trust Fund, which pays hospital bills for Medicare beneficiaries. To show the effect of prospective payment, these projections were adjusted to correct for the different assumptions about inflation and admissions made in each report. We also examined trends in expenditures from the Supplementary Medical Insurance Trust Fund, which pays for outpatient services, to see whether the savings in hospital expenses were offset by higher spending for out-of-hospital services. We found that prospective payment has reduced Medicare's hospital costs substantially. Expenditures from the Hospital Insurance Trust Fund for 1990 are expected to be +12 billion less in 1980 dollars, and +18 billion in 1990 dollars, than was expected shortly before prospective payment went into effect--the equivalent of a savings of approximately 20 percent. By contrast, the effect of prospective payment on the supplementary fund has not been great. We conclude that the prospective payment system is having a major impact on Medicare's hospital expenditures and that the savings is not offset by an increase in outpatient expenditures.

Ambulatory Care↗
PubMed2004

Relationships between HIV/AIDS, income and expenditure over time in deprived South African households.

We compared 202 households with an HIV-infected member, and 202 unaffected neighbouring households, in one rural and one urban area in Free State province, South Africa. Interviews were conducted with a key informant in each household, at baseline and 6, 12 and 18 months later, with 87% follow-up. Results of the baseline and 6 months study were published previously; this paper reports on trends over the full 18 months of follow-up. We analysed changes in income and expenditure and their relationships with morbidity and mortality using multiple regression. Over 2 years, a third of affected households reported at least one death, mainly due to infectious disease. Affected households' real expenditures decreased over time, while real incomes did not, absolutely and relative to unaffected households. Mortality and morbidity independently predicted lower expenditure (adjusted relative expenditure 0.86 and 0.84, respectively), mortality predicted lower income (adjusted relative income 0.80) and higher expenditure predicted less morbidity and mortality (adjusted odds ratios for a US$100 monthly difference 0.78 and 0.65). Households' economies and HIV/AIDS were thus dynamically related, and occurred against a background of progressive poverty. Expenditure was a more sensitive indicator of the economic impact of HIV/AIDS than was income.

Acquired Immunodeficiency Syndrome↗
PubMed2004

Time to death and health expenditure: an improved model for the impact of demographic change on health care costs.

BACKGROUND: Obtaining well-founded estimates of the effect of demographic change on future health expenditures is a pressing issue in all developed countries. Thus far, expenditure projections have examined the effect of age on health care costs, but fail to account for the influence of remaining life expectancy on costs. OBJECTIVE: This paper seeks to create a more accurate projection model that considers the concentration of costs towards the end of life, and to compare this model with the more traditional approach that holds age- and sex-specific per capita expenditures constant. METHODS: We used a longitudinal hospital dataset which followed 90 929 patients aged 65 and older from 1970 to death, to create an economic model of hospital costs based on patient age and time remaining to death. We then applied the model to England population projections to predict the effect of demographic changes on hospital expenditures from 2002 to 2026. RESULTS: The decline in age-specific mortality rates over time postpones death to later ages, pushing back death-related costs. Accounting for this in expenditure projections gave a predicted annual growth rate of 0.40%-half of the rate predicted with a traditional method. CONCLUSIONS: Using richer data and more refined methods than have hitherto been employed, this study strongly confirms that the pressure of population increases and ageing demographic structure on hospital expenditures will be partially countered by the postponement of death-related hospital costs to later in life-a finding consistent with emerging epidemiological evidence, and heartening for policy makers and physicians alike.

Adolescent↗
PubMed2005

Variation by disability in state predictors of Medicaid 1915c waiver use and expenditures.

PURPOSE: States are increasingly using the Medicaid 1915c waiver program to provide community-based long-term care. A substantially greater share of long-term-care dollars supports community-based care for individuals with intellectual and developmental disabilities, relative to older and working-age persons with primarily physical disabilities. DESIGN AND METHODS: We used state-level data for the period from 1992 to 2001 to estimate fixed-effects panel models. We compared state predictors of waiver utilization and expenditures for waivers serving both older and working-age individuals (O/WAIs) relative to waivers serving individuals with intellectual and developmental disabilities (IDDs). RESULTS: We found community-based-care capacity to predict use and expenditures for both target groups. Although regulation of institutional supply was positively related to expenditure measures for IDDs, it was not related to use or expenditures for O/WAIs. Demand variables (e.g., the size of a state's African American population) predicted use and expenditures for IDD waivers, but they were less consistent for O/WAI waivers. State resources were a robust predictor of use and expenditures for both groups. IMPLICATIONS: Increased community-based-care capacity appears to be an important factor in efforts to expand the availability of Medicaid community-based care. Federal policies that address state resource issues may also spur growth in community-based long-term care.

Community Health Services↗
PubMed1994

Developing countries' health expenditure information: what exists and what is needed?

In the past decade, the scarcity of financial resources for the health sector has increasingly led countries to take stock of national health resources used, review allocation patterns, assess the efficiency of existing resource use, and study health financing options. The primary difficulties in undertaking these analyses have been 1) the lack of information on health expenditures and 2) not using existing information to improve the planning and management of health sector resources. The principle sources of available health expenditure information are reported by organizations such as the World Bank, WHO, UNICEF and OECD. Special studies and non-routine information are a second major source of information. This existing data has a number of difficulties, including being sporadic, inconsistency, inclusion of only national level public expenditure, high opportunity and maintenance costs, quantitative and qualitative differences across countries, and validity and interpretability problems. Reliable health expenditure data would be useful not only for in-country, national purposes, but also for cross-national comparisons and for development agencies. Country uses of health expenditure data include policy formulation and planning and management, while international uses would facilitate examination of cross-national comparisons, reviews of existing programmes and identification of funding priorities. Collaborative efforts between countries and international development agencies, as well as between agencies, are needed to establish guidelines for health expenditure data sets. This development must ensure that the resulting information is of direct benefit to countries, as well as to agencies. Results of such collaborative efforts may include a set of standardized methodologies and tools; standardized national health accounts for developing countries; and training to enhance national capabilities to actively use the information. The opportunities for such collaboration are unique with the issuance of the World Development Report 1993, to build on this work in clearly identifying what is needed and proposing a standardized data set and the tools necessary to regularly and economically gather such data.

Data Collection↗