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Biomedical subjects

H Gravelle

Publications and source records attributed to H Gravelle.

18 recordsLinked to original sources
PubMed2003

Income related inequalities in self assessed health in Britain: 1979-1995.

STUDY OBJECTIVE: To measure and decompose income related inequalities in self assessed health in England, Scotland, and Wales, 1979-1995. DESIGN: The relation between individual health and a non-linear transformation of equivalised income, allowing for sex, age, country, and year effects, was estimated by multiple regression. The share of health attributable to transformed income and the Gini coefficient for transformed income were calculated. Inequality in health was measured by the partial concentration index, which is the product of the Gini coefficient and the share of health attributable to transformed income. PARTICIPANTS AND SETTING: Representative annual samples of the adult population living in private households in Great Britain 1979-1995. The total analysed sample was 299,968 people. MAIN RESULTS: Pro-rich health inequality was largest in Wales and smallest in England over the period because the effect of increased income on health was greatest in Wales and least in England. In all three countries, pro-rich health inequality increased throughout the period. In the early 1980s this was primarily attributable to increases in income inequality. Thereafter the increased share of health attributable to income was the principal cause. CONCLUSIONS: Reductions in pro-rich health inequality can be achieved by reducing income inequality, reducing the effect of income on health, or both.

Adult↗
PubMed2001

Discounting for health effects in cost-benefit and cost-effectiveness analysis.

When health effects can be valued in monetary terms, as in cost-benefit analysis, they should be discounted at the same rate as costs. If health effects are measured in quantities (e.g. quality adjusted life years) as in cost-effectiveness analysis (CEA) and the value of health effects is increasing over time, discounting the volume of health effects at a lower rate than costs is a valid method of taking account of the increase in the future value of health effects. We show that the Keeler-Cretin paradox, often used as an argument against discounting health effects at a lower rate than costs, has no relevance for the choice of discount rate in CEA. We present individualistic and welfare models to argue that the rate of growth of the value of health effects is positive. The welfare model suggests that the value of health grows at a rate dependent on the rate of growth of the value of the direct effect of health on utility, the growth rate of income, the elasticity of the marginal utility of income and the extent to which individuals are insured against the income risks of ill health.

Cost-Benefit Analysis↗
PubMed2001

Inducing or restraining demand: the market for night visits in primary care.

We analyse the demand for and the supply of night visits in primary care. We present a model of general practitioners (GPs) choice between meeting demand by making visits themselves or passing them to commercial deputising services. We extend previous models of demand management to allow for demand discouragement as well as demand inducement. Demand and supply equations are derived and estimated using 1984/1985-1994/1995 panel data for English primary care health authorities. Demand is not affected by the likelihood that the visit is made by a GP or a deputy, suggesting that patients do not perceive these visits as being of different quality. The introduction of differential fees for GP and deputy visits in April 1990 led GPs to increase their own visits and to reduce the number made by deputies. The fee change also led to demand being managed downward where GPs used deputies and to demand inducement where they met demand themselves.

Contract Services↗
PubMed2001

The practice of discounting in economic evaluations of healthcare interventions.

OBJECTIVES: Discounting of costs in health-related economic evaluation is generally regarded as uncontroversial, but there is disagreement about discounting health benefits. We sought to explore the current recommendations and practice in health economic evaluations with regard to discounting of costs and benefits. METHODS: Recommendations for best practice on discounting for health effects as set out by government agencies, regulatory bodies, learned journals, and leading health economics texts were surveyed. A review of a sample of primary literature on health economic evaluations was undertaken to ascertain the actual current practice on discounting health effects and costs. RESULTS: All of the official sources recommended a positive discount rate for both health effects and costs, and most recommended a specific rate (range, 1% to 8%). The most frequently specified rates were 3% and 5%. A total of 147 studies were reviewed; most of these used a discount rate for health of either 0% (n = 50) or 5% (n = 67). Over 90% of studies used the same discount rate for both health and cost. While 28% used a zero rate for both health and cost, in 64% a nonzero rate was used for both. Studies where the health measure was in natural clinical units (direct) were significantly more likely to have a zero discount rate. CONCLUSION: The finding that 28% of studies did not discount costs or benefits is surprising and concerning. A lower likelihood of discounting for benefits when they are in natural units may indicate confusion regarding the rationale for discounting health effects.

Benchmarking↗
PubMed2001

Inequality in the geographical distribution of general practitioners in England and Wales 1974-1995.

OBJECTIVES: To compare geographical inequality in the distribution of general practitioners (GPs), other resources and mortality around 1995 in England and Wales; to measure trends between 1974 and 1995 in inequality of GP distribution; to examine the implications of different need adjustments and inequality measures on the degree of geographic inequality; and to analyse the impact of policies (increased supply, area inducements and entry regulation) on inequality. METHODS: Measurement of relative inequality (decile ratio, Gini coefficient, Atkinson index) and absolute inequality (standard deviation) in the ratio of GPs to need-adjusted population in former Family Practitioner Committee/Family Health Services Authority areas each year from 1974 to 1995; and relative inequality across areas in the distributions of income, other resources and standardised mortality ratios (SMRs) around 1995. Regression of 1995 GP/population ratios on 1974 ratios. Application of equalising net advantages location model to GP distribution. RESULTS: Inequality in the distribution of GPs in 1995 was less than inequality in other primary care resources, but greater than inequalities in disposable income, SMRs, primary school expenditure, and hospital and community health services expenditure. The decile ratio shows little change between 1974 and 1995. Gini and Atkinson inequality indices indicate some reduction in inequality between 1974 and 1980, but little change thereafter. The standard deviation of need-adjusted provision increased over the period. Areas that had the lowest GP provision in 1974 tended to have the lowest in 1995. CONCLUSIONS: The choice between relative and absolute inequality measures and, to a lesser extent, the method of adjusting for need affect conclusions about the trend in inequality. Both types of measure and most need adjustments suggest that the policies adopted did not lead to a reduction in inequality over the period. Interactions between policies may reduce their overall effectiveness.

England↗
PubMed2000

Efficiency and administrative costs in primary care.

We use a formal model to examine the implications of endogenous managerial effort for the interpretation and estimation of efficiency in health care organisations. The model is applied to investigate the doubling of the cost of administering primary care in England in real terms between 1989/1990 and 1994/1995. The main cost determinant was the number of general practitioners (GPs), and there were economies of scale but not of scope. Fund-holding had a positive but small effect on administrative costs, so that the recent abolition of fund-holding may do little to reduce primary care administrative costs. After allowing for changes in the numbers of primary care practitioners, the quality of primary care and the extent of fund-holding, most of the increase in costs was unexplained, and may reflect additional but unmeasured increases in the administrative burden associated with the 1990 reforms. There was little variation in relative efficiency across areas.

Cost Allocation↗
PubMed2000

Quality incentives in a regulated market with imperfect information and switching costs: capitation in general practice.

We model a system akin to the British National Health Service (NHS), in which general practictioners (GPs) are paid by capitation from general taxation. GPs are horizontally and vertically differentiated and compete for patients via their imperfect observed quality. We show that for any given capitation fee quality is lower and the incentive effects of the fee on quality are smaller when there is imperfect information. There are diminishing welfare gains from improving patient information but increasing welfare gains from reducing switching costs. GPs do not act efficiently to improve patient information via advertising or to reduce the costs of switching.

Capitation Fee↗
PubMed1999

Measuring quality of care with routine data: avoiding confusion between performance indicators and health outcomes.

OBJECTIVE: To investigate the impact of factors outside the control of primary care on performance indicators proposed as measures of the quality of primary care. DESIGN: Multiple regression analysis relating admission rates standardised for age and sex for asthma, diabetes, and epilepsy to socioeconomic population characteristics and to the supply of secondary care resources. SETTING: 90 family health services authorities in England, 1989-90 to 1994-5. RESULTS: At health authority level socioeconomic characteristics, health status, and secondary care supply factors explained 45% of the variation in admission rates for asthma, 33% for diabetes, and 55% for epilepsy. When health authorities were ranked, only four of the 10 with the highest age-sex standardised admission rates for asthma in 1994-5 remained in the top 10 when allowance was made for socioeconomic characteristics, health status, and secondary care supply factors. There was also substantial year to year variation in the rates. CONCLUSION: Health outcomes should relate to crude rates of adverse events in the population. These give the best indication of the size of a health problem. Performance indicators, however, should relate to those aspects of care which can be altered by the staff whose performance is being measured.

Age Distribution↗
PubMed1999

Capitation contracts: access and quality.

The implications of competition amongst providers in both private and public systems for the quality of service and the number of care providers are analysed. Strong conditions must be imposed on preferences and cost conditions for quality to be efficiently supplied. In a median voter model of a public system the capitation fee and quality are lower than under competitive market equilibria and the number of practices inefficiently small. Entry control by a union which maximises gross provider income reduces the number of practices until the market is only just covered.

Capitation Fee↗
PubMed1999

Do measures of self-reported morbidity bias the estimation of the determinants of health care utilisation?

Most national surveys of health care utilisation capture only self-reported measures of morbidity. If self-reported morbidity is measured with error, then the results of applied work may be misleading. In this paper we propose a model of the relationship between morbidity and health service utilisation which allows for reporting errors and simultaneity. Errors in self-reported morbidity are expressed as a function of person-specific reporting thresholds and recent contact with health services, arising because of better self-evaluation of current health status or a desire to justify consumption of a publicly-provided good. We demonstrate the bias in ignoring the potential problems of reporting errors and simultaneity for a variety of special cases, but in the general case the biases are of ambiguous sign. The empirical nature of these biases is investigated using limiting long-standing illness (LLI) and recent contact with a General Practitioner (GP) in two waves of The UK Health and Lifestyle Survey. Biomedical measures of functioning are used as objective indicators of health status. We find evidence of substantial and significant differences between individuals in reporting thresholds and some evidence that the reporting of LLI may depend on recent visits to a GP. Adjustments for these biases significantly increase the estimated effect of morbidity on utilisation.

Adult↗
PubMed1998

Paying patients to comply: an economic analysis.

A significant proportion of patients do not complete prescribed treatment or do not follow medical advice. There is evidence that financial incentives can increase compliance. We present a model of patient compliance and use it to examine the circumstances in which patients should be paid to comply with treatment and discuss the factors determining the optimal level of payment to patients.

Cost-Benefit Analysis↗
PubMed1990

Will a breast screening programme change the workload and referral practice of general practitioners?

STUDY OBJECTIVE: The aim of the study was to consider possible changes in the clinical activities of general practitioners whose patients are registered in a breast cancer screening programme. DESIGN: The study was a survey based on completion of forms recording breast consultations carried out by participating general practitioners during a four week period. SETTING: One of three intervention centres and one of three comparison centres in the national trial of early detection of breast cancer was selected. The intervention centre was in Guildford; the comparison centre in Stoke on Trent. PARTICIPANTS: The participants were general practitioners in the selected centres. In Guildford, 64 of 99 general practitioners approached took part (65%); in Stoke on Trent, 81 of 177 took part (46%). The proportion of male and female participants in the two centres was similar. Doctors in Stoke on Trent were older and worked in smaller practices than in Guildford. RESULTS: A comparison of workloads showed that in the screening centre there was less demand for doctor consultations from those in the screened age group, but those excluded from screening made more use of the general practitioners' services. A difference in referral practice was also apparent, with doctors in the screening centre referring more frequently for specialist advice. CONCLUSIONS: The evidence suggests that no significant change in the overall use of general practice resources can be expected with the introduction of national screening, but there may be greater pressure on assessment services.

Adult↗