Occupational exposure of UK adults to extremely low frequency magnetic fields.

BACKGROUND: Occupational exposure to extremely low frequency (ELF) magnetic fields (MF) in the UK general population is poorly documented. AIMS: To assess levels of occupational exposure to ELF MF in the UK and evaluate the use of a rigid job-exposure matrix (JEM) to assign exposures to subjects in the UK Adult Brain Tumour Study (UKABTS). METHODS: Personal ELF MF measurements were carried out. Exposure traces were divided into occupational, travel and elsewhere periods, under differing exposure metrics. Exposure was classified by Standard Occupational Classification (2000), Standard Industrial Classification (1997), and a combined occupation-industry classification. Statistical analyses (mixed effects model) determined the contribution of occupational exposure to the 24 h cumulative exposure and the contribution of occupation and industry to total variance. RESULTS: Data were obtained from 317 individuals, comprising UKABTS subjects (n = 192), occupational proxies for UKABTS subjects (n = 101) and "interest" readings (n = 24). 236 individuals provided occupational data covering 117 different occupations. Average exposure was significantly higher at work than at home. Elevated average occupational exposure was found for welding trades, printers, telephonists and filing and other records assistants. The discrimination of a rigid JEM based on occupation can be improved by linking the classification with industry and by the use of contextual information. CONCLUSIONS: This report substantially expands information on adult exposure to ELF MF in the UK. The accuracy of exposure assessments based solely on job codes is improved by linking with either industry code or contextual knowledge of equipment and of power lines or substations in the work environment.

Impact of private funding on access to elective hospital treatment in the regions of England and Wales. National records survey.

BACKGROUND: The UK National Health Service aims to match access to health care to the level of need and to reduce inequalities in the health of sub-populations. One in ten persons have private medical insurance (PMI). This study describes the impact of private purchasing on access to hospital care in regions according to health need. METHOD: Details of admissions to NHS hospitals in one year and waiting times were obtained from the government's Hospital Episodes Statistics, and of patients in independent hospitals through weighted time samples of records. Data were combined into two groups, state funded and privately funded patients. The prevalence of limiting longstanding illness and the proportions of individuals covered by PMI in Wales and the eight English health regions were obtained from the General Household Survey. Correlation coefficients were calculated for inter-regional relationships between measures of need, provision of resources and levels of activity. RESULTS: Limiting, longstanding illness was significantly associated with NHS resource levels, NHS hospital activity, and total hospital activity, however funded; and inversely with PMI coverage, waiting times for NHS admission and levels of privately funded activity. Waiting times for admission were positively correlated with PMI coverage. CONCLUSIONS: Regionally, NHS resources and activity match need. Private hospital use complements lower levels of NHS service. Private consumption does not distort access according to need but in regions with lower levels of NHS activity those least deprived may make relatively more use of NHS hospitals, thus widening the health gap. Small area studies should explore this.

Emergency transfer from independent hospitals to NHS hospitals: risk, reasons and cost.

BACKGROUND: In view of public concern about standards of emergency care in independent hospitals and the impact of transferred patients on NHS facilities we aimed to estimate the number and risk of emergency transfers from independent hospitals to NHS hospitals; to describe the circumstances; and estimate costs to the NHS. METHODS: Patients transferred in three months from 137 independent hospitals were identified from central records systems and local hospital enquiries. Circumstances were described by Directors of Nursing in telephone interviews. Numbers were weighted for whole year activity and non-participating hospitals to estimate total transfers in 1999. Medical Directors of NHS Trusts receiving the patients supplied durations of stay in critical care and other facilities. NHS Reference Costs were applied. RESULTS: There were 158 emergency transfers (plus 105 planned transfers, and 18 as a result of funding problems). Proportionately more emergency transfers were from hospitals lacking intensive care facilities. Patients over 65 years old constituted 61 per cent of transfers but only 25 per cent of all cases. Transfer followed major abdominal surgery in 42 (26 per cent) cases and major orthopaedic surgery in 31 (20 per cent), although these treatments constituted only 2 per cent and 3 per cent of the caseloads. There were an estimated 749 emergency transfers in 1999 (95 per cent confidence interval 640-875), a risk of 1 in 956 (all ages) and 1 in 392 (aged over 65); 729 had been funded privately, of whom two-thirds became NHS patients after transfer, costing Pound Sterling 2.61 million. CONCLUSIONS: The scale of emergency transfer (two per day) and resulting cost to the NHS is small. The risk is reducible if patients and interventions are matched to hospitals' critical care capabilities. Common clinical service guidelines should apply to NHS and independent hospitals.

Patients and procedures in short-stay independent hospitals in England and Wales, 1997-1998.

BACKGROUND: Private hospitals' activities are not routinely reported, so what services they provide and for whom is not known. This study describes the clientele and case-mix of independent hospitals in England and Wales in 1997-1998. METHOD: Person, clinical and funding data were collected on samples of patients admitted to 215 of 221 independent hospitals open in 1997-1998. Sample numbers were weighted to reflect sampling duration, region, season and non-response. RESULTS: A total of 37,434 sampled records represented 828,422 admissions: 406,843 in-patients (5 per cent fewer than in 1992-1993) and 421,580 day cases (69 per cent more); 806,509 were residents of England and Wales (up 24 per cent); 16,628 came from overseas (down 20 per cent). Numbers increased in all age groups except children; 25 per cent were 65 or over (18 per cent in 1992-1993). The commonest procedures were abortion (11 per cent), endoscopy of the gastro-intestinal tract (10 per cent) or joints (5 per cent), lens operations (5 per cent), hernia repairs (3 per cent), and other common National Health Service (NHS) elective operations. The NHS funded 84,561 patients (11 per cent of the total) including 41,942 non-abortion cases (6 per cent). A total of 540,996 (76 per cent) paid through insurance; 119,101 (17 per cent) were self-funded including 30 per cent of the over-75s. Ninety-five per cent of patients went home, 0.3 per cent died and 0.2 per cent were transferred to NHS hospitals. CONCLUSIONS: Demand for short-stay independent hospital care is rising. The clientele is becoming older, and readier to pay out of pocket. Clinical activity is mainly surgical and similar to NHS elective surgical demand. One year's caseload equals 10 weeks' elective admissions to NHS hospitals, in that sense relieving the NHS. The scale of transfer to NHS hospitals (three per day) is small.