Impact of the availability of midurethral slings on treatment strategies for stress urinary incontinence: a cost-effectiveness analysis

OBJECTIVE

To perform a cost-effectiveness analysis for the surgical and non-surgical management of stress urinary incontinence (SUI) with and without the availability of midurethral sling.

DESIGN

Cost-effectiveness analysis.

SETTING

USA, 2019.

POPULATION

Women with stress urinary incontinence.

METHODS

We modelled SUI treatment pathways with and without the availability of midurethral slings, including no treatment, incontinence pessary, pelvic floor muscle physical therapy, urethral bulking injection, open and laparoscopic Burch colposuspension, and pubovaginal autologous sling. Time horizon was 2 years after initial treatment.

MAIN OUTCOME MEASURES

Costs (2019 US$) included index surgery, surgical retreatment, and complications including urinary retention, de novo urgency and mesh exposure. The incremental cost-effectiveness ratio (ICER) was calculated for non-dominated treatment strategies.

RESULTS

The least costly treatment strategies were incontinence pessary, pelvic floor physical therapy, no treatment and midurethral sling, respectively. Midurethral slings had the highest effectiveness. The strategy with the lowest effectiveness was no treatment. The three cost-effective strategies included pessary, pelvic floor muscle physical therapy and midurethral slings. No other surgical options were cost-effective. If midurethral slings were not available, all other surgical options were still dominated by pelvic floor muscle physical therapy. Multiple one-way sensitivity analyses confirmed model robustness. The only reasonable threshold in which outcomes would change, was if urethral bulking costs decreased 12.6%.

CONCLUSIONS

The midurethral sling is the most effective SUI treatment and the only cost-effective surgical option.

TWEETABLE ABSTRACT

Midurethral sling is the only cost-effective surgical treatment option for stress urinary incontinence.

A cost-effectiveness analysis of sentinel lymph node detection in vulvar cancer by preoperative lymphoscintigraphy versus intraoperative detection alone

OBJECTIVE

To determine cost-effectiveness of preoperative lymphoscintigraphy (LSG) for detection of inguinofemoral sentinel lymph nodes (SLN).

METHOD

We compared the use of preoperative LSG prior to SLN excision versus omission of preoperative LSG. The two outcomes were death or survival. Costs associated with the procedure were determined by CPT code and published estimates. Cost analysis was performed using Treeage software, and incremental cost-effectiveness ratios (ICERs) were calculated. The measure of effectiveness was incremental survival benefit. ICER thresholds for considering LSG to be cost-effective were based on the value of a statistical life (VSL).

RESULTS

Using a baseline probability of 0.93 for finding SLN with LSG, our model estimated LSG costs were $2783.84 with 84.7% survival. Our model then estimated the cost and survival without LSG by varying the SLN detection rate. Survival was equivalent when probability of SLN detection without LSG was 0.93. If detection without LSG was >0.93, not performing LSG was the dominant strategy. Costs were equal when probability of finding SLN without LSG was 0.6. For any SLN detection without LSG below 0.6, performing LSG was the dominant strategy. Formal cost-effectiveness analysis was performed using ICERs for probabilities from 0.60 to 0.93. In this range, costs were higher with LSG, but survival was improved. As long as the incremental detection with LSG was at least 1.05% to 1.47% higher, LSG was cost-effective with ICERs below the VSL.

CONCLUSION

In our model, LSG is cost-effective as long as it increases detection of SLN by at least 1.05-1.47%.

Non-firearm weapon use and injury severity: priorities for prevention

OBJECTIVES

To test the hypothesis that weapon-related violence (excluding firearms) results in more severe injury relative to the use of body parts (fists, feet and other body parts), and to rank order of injury severity by assault mechanism.

DESIGN

Retrospective cohort study.

PARTICIPANTS

24,660 patients who were treated in a UK emergency department for violence-related injury.

MAIN OUTCOME MEASURE

Score on the Manchester Triage Scale.

RESULTS

The use of a weapon resulted in significantly more serious injury (adjusted odds ratio (AOR) 1.13, 95% confidence interval (CI) 1.00 to 1.28). However, of all mechanisms of violent injury, the use of feet resulted in most severe injury (AOR 1.41, 95% CI 1.17 to 1.70), followed by blunt objects (AOR 1.35, 95% CI 1.14 to 1.58), other body parts (AOR 1.22, 95% CI 1.06 to 1.40) and sharp objects (AOR 1.09, 95% CI 0.91 to 1.5), compared with use of fists.

CONCLUSIONS

Use of weapons resulted in more severe injury than use only of body parts. The use of feet caused the most serious injuries, whereas the use of fists caused the least severe injuries. Injury severity varied by number of assailants and age of the patient--peaking at 47 years--but not by number of injuries. Preventing the use of feet in violence, and preventing group violence should be major priorities.

Meglitinide analogues for type 2 diabetes mellitus

BACKGROUND

In type 2 diabetes mellitus, impairment of insulin secretion is an important component of the disease. Meglitinide analogues are a class of oral hypoglycaemic agents that increase insulin secretion, in particular, during the early phase of insulin release.

OBJECTIVES

The aim of this review was to assess the effects of meglitinide analogues in patients with type 2 diabetes mellitus.

SEARCH STRATEGY

We searched several databases including The Cochrane Library, MEDLINE and EMBASE. We also contacted manufacturers and searched ongoing trials databases, and the American Diabetes Association (ADA) and European Association for the Study of Diabetes (EASD) websites.

SELECTION CRITERIA

We included randomised controlled, parallel or cross-over trials comparing at least 10 weeks of treatment with meglitinide analogues to placebo, head-to-head, metformin or in combination with insulin.

DATA COLLECTION AND ANALYSIS

Two authors independently extracted data and assessed trial quality.

MAIN RESULTS

Fifteen trials involving 3781 participants were included. No studies reported the effect of meglitinides on mortality or morbidity. In the eleven studies comparing meglitinides to placebo, both repaglinide and nateglinide resulted in a reductions in glycosylated haemoglobin (0.1% to 2.1% reduction in HbA1c for repaglinide; 0.2% to 0.6% for nateglinide). Only two trials compared repaglinide to nateglinide (342 participants), with greater reduction in glycosylated haemoglobin in those receiving repaglinide. Repaglinide (248 participants in three trials) had a similar degree of effect in reducing glycosylated haemoglobin as metformin. Nateglinide had a similar or slightly less marked effect on glycosylated haemoglobin than metformin (one study, 355 participants). Weight gain was generally greater in those treated with meglitinides compared with metformin (up to three kg in three months). Diarrhoea occurred less frequently and hypoglycaemia occurred more frequently but rarely severely enough as to require assistance.

AUTHORS' CONCLUSIONS

Meglitinides may offer an alternative oral hypoglycaemic agent of similar potency to metformin, and may be indicated where side effects of metformin are intolerable or where metformin is contraindicated. However, there is no evidence available to indicate what effect meglitinides will have on important long-term outcomes, particularly mortality.

Relations between alcohol, violence and victimization in adolescence

BACKGROUND

Compared to links between alcohol and aggression, links between alcohol and vulnerability are poorly understood.

OBJECTIVES

To determine whether there is a significant relationship between vulnerability to physical violence and alcohol consumption in adolescence independent of a relationship between alcohol consumption and violent behaviour.

DESIGN, SETTING, PARTICIPANTS

Cross-sectional study of 4187 adolescents aged 11-16 in a stratified sample of 13 English schools.

RESULTS

Fighting decreased with age whereas hitting others and being hit increased. Relationships between fighting, hitting others and vulnerability to being hit and frequency of drinking and drunkenness were all highly significant (p<0.0001), and were evident at all ages. The outcome most strongly related to frequency of drunkenness was hitting others (odds ratio (OR) 6.62), followed by being hit (OR 4.01) and fighting (OR 2.10). Alcohol consumption and drunkenness remained significantly and independently associated with vulnerability to being hit after adjusting for violent behaviour as well as age and sex.

CONCLUSIONS

These findings indicate an association between alcohol and victimization independent of associations of both with physical aggression. Reducing intoxication may reduce victimisation without necessarily affecting violent behaviour. Violence reduction should focus as much on preventing alcohol misuse among victims or potential victims as among offenders.

Confidential registration in health services: randomised controlled trial

BACKGROUND

Human rights legislation safeguards the privacy and dignity of patients.

OBJECTIVE

To assess the effectiveness in terms of patient assessed privacy of confidential registration.

DESIGN

Randomised controlled trial.

SETTING

Emergency Department, University Hospital of Wales.

PARTICIPANTS

A total of 302 patients aged over 15 years.

MAIN OUTCOME MEASURES

Binary choices and ordinal visual analogue scores from a validated questionnaire on self reported measures: patient ability and preference to speak to receptionists and disclose confidential information without being overhead and concern about disclosure of items of confidential personal information.

RESULTS

Patients who registered in a screened area felt significantly more able to tell receptionists things they did not want others to hear. Control patients were significantly more concerned than intervention patients that others heard their name, address, date of birth, reason for emergency department attendance, and telephone number, but not their marital status. Overall, intervention patients were less concerned about disclosure of information and that they had been overheard.

CONCLUSIONS

Patients value privacy when they register and are concerned if others can hear them tell receptionists who they are, how to contact them, and why they are there. Confidential registration should be instituted in health services. Confidential registration increased patient privacy and should be instituted in health services.

Tackling alcohol related violence in city centres: effect of emergency medicine and police intervention

OBJECTIVES

To identify correlates of alcohol related assault injury in the city centre of a European capital city, with particular reference to emergency department (ED) and police interventions, and number and capacity of licensed premises.

METHODS

Assaults resulting in ED treatment were studied using a longitudinal controlled intervention, a three stage design during a three year period of rapid expansion in the night-time economy, when ED initiated targeted police interventions were delivered. A controlled ED intervention targeted at high risk night-clubs was carried out. Main outcome measure was ED treatment after assault in licensed premises and the street.

RESULTS

Targeted police intervention was associated with substantial reductions in assaults in licensed premises but unexpected increases in street assault were also observed (34% overall: 105% in the principal entertainment thoroughfare). Combined police/ED intervention was associated with a significantly greater reduction compared with police intervention alone (OR = 0.61, 95% CI 0.40 to 0.91). Street assault correlated significantly with numbers and capacity of premises. Risk of assault was 50% greater in and around licensed premises in the city centre compared with those in the suburbs, although dispersion of violence to more licensed premises was not observed.

CONCLUSIONS

Marked decreases in licensed premises assaults resulting from targeted policing were enhanced by the intervention of ED and maxillofacial consultants. Capacity of licensed premises was a major predictor of assaults in the city centre street in which they are clustered. City centre assault injury prevention can be achieved through police/ED interventions targeted at high risk licensed premises, which should also target the streets around which these premises are clustered.

Winning, losing, and violence

BACKGROUND

Although international sports events attract huge interest, and results can be a barometer of popular national standing, their impact on violent behaviour has not been investigated.

METHODS

Associations between assault related emergency department (ED) attendances and international sporting events (home and away rugby and soccer matches) in a European capital city (Cardiff) served by one ED, between 1 May 1995 and 30 April 2002 were investigated. The frequency of assault related ED attendances were studied relative to whether the national team won or lost, controlling for potential covariates: match attendance, match location (home/away), results (win/lose), net scores, and day of match (weekend/weekday). Multiple linear regression was used to identify significant associations with ED assault related attendances.

RESULTS

Matches which the Wales team won (p = 0.03), match attendance (p<0.001), and weekend matches (p<0.001) were positively associated with ED assault related injury attendances. Assault frequency measured in this way was no different for home and away matches.

CONCLUSIONS

Assault injury resulting in ED treatment was more frequent when national teams won than when they lost. Sport type made no difference. Violence prevention efforts should be increased on international match days, when the national team is expected to win, when match attendance is large, and for away as well as home matches.

Development, utilisation, and importance of accident and emergency department derived assault data in violence management

OBJECTIVES

To develop formal processes for the collection, disclosure, and effective use of accident and emergency (A&E) department derived assault injury data for city violence reduction.

METHODS

Over a four year period, managed by a multi-agency steering group, A&E data collection, collation, and disclosure processes were developed, instituted, and refined. Consultations and negotiations between agencies identified the most effective and ethical methods, appropriate recipients, and the nature of the information of most use.

RESULTS

Disclosure of A&E data to city authorities, the police, and local media drew substantial attention and crime prevention resources to the locations of violence. As a result, a police task force responsible for targeting city street crime was funded, which analysed both A&E and police information. Monthly, electronic transfer of raw, anonymous data to the task force crime analyst informed and prompted violence prevention initiatives by several agencies. Police mounted overt and covert interventions targeted at violence hotspot licensed premises and used the data to oppose, on injury grounds, drinks/entertainment licence applications. Transport authorities established new half hourly night time city centre bus services. The local authority mounted an assault awareness campaign in schools and public libraries, and licensing magistrates used the data to measure, for example, the impact of continuous 36 hour drinks licensing on public safety.

CONCLUSIONS

The principal finding of this evaluation was that judicious sharing of unique information about locations and times of violence derived from A&E patients was a powerful and effective means of targeting police and other local resource to bring about violence reduction.

Effect of urban closed circuit television on assault injury and violence detection

OBJECTIVE

To evaluate the effect of closed circuit television (CCTV) surveillance on levels of assault injury and violence detection.

DESIGN

Intervention versus control study design.

SETTING

Five town/cities with CCTV surveillance and five, matched control centres without CCTV surveillance in England.

INTERVENTION

CCTV installation and surveillance.

METHODS

Assault related emergency department attendances and violent offences recorded by the police in CCTV and control centres in the four years, 1995-99, two years before and two years after CCTV installation, were compared.

RESULTS

Assault related emergency department attendances decreased in intervention centres (3% decrease, ratio 0.96; 95% confidence interval (CI) 0.93 to 0.99) and increased in control centres (11% increase, ratio 1.11; 95% CI 1.08 to 1.14). Overall, changes in emergency department assault attendance in CCTV and control centres were significantly different (t test, p<0.05). Police recorded violence increased in CCTV (11% increase, ratio 1.16; 95% CI 1.08 to 1.24) and control centres (5% increase, ratio 1.06; 95% CI 0.99 to 1.13). Overall, changes in police recording in CCTV and control centres were not significantly different (t test, p>0.05). In CCTV centres, decreases in assault related emergency department attendances and increases in police violence detection were not uniform.

CONCLUSION

CCTV surveillance was associated with increased police detection of violence and reductions in injury or severity of injury. CCTV centre variation deserves further study.

Predictors and severity of injury in assaults with barglasses and bottles

BACKGROUND

Although glasses and bottles are frequently used as weapons in assaults, there is little knowledge on which prevention strategies can be based.

DESIGN

Scrutiny of a random sample of 1288 criminal injury compensation applications.

OBJECTIVE

To identify predictors and relative severity of glass and bottle injury.

METHOD

Injury site, severity, treatment, and demographic characteristics of victims and assailants were studied with reference to awards from the UK national Criminal Injuries Compensation Authority (CICA).

MAIN OUTCOME MEASURES

Gender of victims and assailants, injury sites, treatment, and award (UK pounds) as indices of injury severity.

RESULTS

Annual CICA awards to all victims of assaults in licensed premises during 1996-98 amounted to pound 4.08 million (for all glass/bottle assaults: pound 1.15 million = 28%). The mean cost of 746 glass assaults was pound 2347, compared with pound 2007 for 542 injuries from bottle assaults (mean difference pound 340; p<0.01). This difference largely reflected more eye injuries with glasses (26 cases: 3% of all glass assaults) than with bottles (eight cases: 1% of all bottle assaults). Bottle assault was significantly associated with unidentified assailants and scalp injuries; whereas glass injury was significantly linked to pub opening hours (midday to midnight), Thursdays, eye and face injuries, and treatment requiring sutures. Mean age of bottle assault victims (26.1 years) was lower than of glass victims (27.3 years; p<0.01), and same gender assaults were more frequent than between gender assaults for both bottle (p<0.001) and glass (p<0.001) assaults. Female victims were allocated to lower compensation awards more frequently than male victims; this was the case for both bottle (p<0.05) and glass (p<0.01) assaults.

CONCLUSIONS

Assaults with bottles caused less serious injury and resulted in lower compensation costs. Injury distribution was linked to victim gender and weapon choice, but not to assailant gender. Prevention strategies should focus on both bottle and glass assaults and should take account of the setting and time in which drinking occurs.

A randomized controlled trial of a brief intervention after alcohol-related facial injury

AIM

To evaluate the effectiveness of a brief motivational intervention on alcohol consumption and misuse in young males with alcohol-related face injury.

DESIGN

Randomized controlled trial.

SETTING

Oral and maxillofacial surgery out-patient clinic in an urban teaching hospital.

PARTICIPANTS

One hundred and fifty-one participants were randomized to motivational intervention and control conditions.

INTERVENTIONS

Control was treatment as usual. The intervention was treatment as usual plus a one-session brief motivational intervention administered by a nurse.

MEASUREMENTS

Three sets of measurements were taken at baseline, 3-month and 1-year follow-up. Collateral measurements were also taken at 1-year follow-up. Primary outcome measures were total alcohol consumption, typical weeks consumption and days abstinent in preceding 3 months. Other outcome measures included the Alcohol Use Disorders Identification Test, a short form of the Alcohol Problems Questionnaire, and a measure of satisfaction with social relationships.

RESULTS

There was a significant decrease in 84-day total alcohol consumption across the year (P < 0.006) and further, a significant effect for the motivational intervention was demonstrated (P < 0.029). This pattern was repeated for days abstinent and alcohol consumption in a typical week as well as alcohol-related problems. There was a significantly greater reduction in the percentage of hazardous drinkers in the motivational intervention group (from 60% to 27%, P < 0.009) compared to the control group (from 54% to 51%, NS).

CONCLUSION

A proportion of young men change their alcohol consumption following alcohol-related injury. A nurse-led psychological intervention adds significantly to the proportion and magnitude of response.

Alcohol-related violence and the role of oral and maxillofacial surgeons in multi-agency prevention

The maxillofacial region is by far the most frequently selected target in assaults on adults. There is a causal link between alcohol intoxication and injury. Therefore, oral and maxillofacial surgery is, in effect, the lead speciality for those injured in violence and has a responsibility to orchestrate holistic care that takes into account mental health needs. Recent years have also seen a determined effort by oral and maxillofacial surgeons to get involved in wider issues of prevention, exemplified by the national UK BAOMS Facial Injuries Awareness Week. Multi-agency prevention, not just with mental health professionals in the case of individual patients, but also with emergency medicine, public health, local government, the police and the voluntary sector is key to success. Given the potential complexity of collaborations like this, it is important to understand what works in multi-agency prevention. This paper reviews successful interventions: their rationale and how oral and maxillofacial surgeons can contribute to local injury prevention.

Recording of community violence by medical and police services

OBJECTIVES

To determine the extent to which community violence that results in injury treated in emergency departments appears in official police records and to identify age/gender groups at particular risk of under-recording by the police.

METHODS

Non-confidential data for patients with assault related injury treated in the emergency departments of two hospitals in one South Wales city (Swansea) during a six month period were compared with data relating to all recorded crimes in the category "Violence against the person" in the police area where the hospitals were located.

RESULTS

Over the six month period a total of 1513 assaults were recorded by Swansea emergency departments and the police (1019, 67.3% injured males and 494, 32.7% injured females). The majority of these assaults (993, 65.6%) were recorded exclusively by emergency departments; 357 (23.6%) were recorded only by the police and 163 (10.8%) were recorded by both emergency departments and the police. Equal proportions of males (67.3%) and females (67.5%) injured in assaults were recorded by both emergency departments and the police, but men were more likely to have their assault recorded exclusively in emergency departments (odds ratio (OR) 2.1, 95% confidence interval (CI) 1.7 to 2.7) while women were more likely to have their assault recorded exclusively by the police (OR 2.5, 95% CI 2.0 to 3.2). There were no significant relationships between exclusive emergency department recording and increasing age (OR 1.0, 95% CI 0.9 to 1.2), exclusive police recording and increasing age (OR 1.1, 95% CI 1.0 to 1.2), or between age and dual recording (OR 0.9, 95% CI 0.8 to 1.0).

CONCLUSIONS

Most assaults leading to emergency department treatment, particularly in which males were injured, were not recorded by the police. Assaults on the youngest group (0-10, particularly boys) were those least likely to be recorded by police and females over age 45, the most likely. Emergency department derived assault data provide unique perspectives of community violence and police detection.

Adolescents' beliefs about future substance use: a comparison of current users and non-users of cigarettes, alcohol and illicit drugs

OBJECTIVES

To explore the expectations of adolescents about their future cigarette, alcohol and illicit drug use. It was hypothesized that differences would be found between current substance users and non-users and that younger children would have less realistic beliefs about their future use than older children.

DESIGN, SETTING, PARTICIPANTS

Survey of 7022 pupils (aged 11-16) in 13 non-randomly selected schools from three Local Education Authority areas in Northern England, the Midlands and London, relating to current substance use and beliefs about future use of cigarettes, alcohol and illicit drugs.

MEASURES

Respondents were asked confidentially about occasions of cigarette, alcohol and illicit drugs use as well as about their belief about use in the year following the survey.

RESULTS

Substantial differences were found in relation to all substances. Of those children who currently smoked, 73% believed it likely they would be doing so in a year's time. Only 3% of non-smokers believed they would begin to smoke in the year following the survey. Eighty-three per cent of alcohol drinkers believed they would be drinking in a year's time compared with 20% of non-drinkers and 63% of illicit drug users believed in their continued use. Only 3% of non-drug users believed they would initiate use in the year following the survey. More non-smoking girls than boys responded "don't know" when asked about their future beliefs regarding cigarette use (15.6% vs. 11.3%), a position which was reversed for current smokers (15.4% vs. 19.3%). 13.1% of drinkers and 30.7% of non-drinkers did not know if they would be drinking a year after the survey and 23.2% of illicit drug users did not know what their drug using status would be in a year compared to 9.7% of current non-users. Of those who were drinking alcohol, but not using illicit drugs or smoking cigarettes, 33% thought it likely that they would have a problem with either drugs or alcohol at some time in the future compared to 7% of non-drinkers. Seventy-four per cent of children currently using illicit drugs thought it likely they could have a substance abuse problem in the future compared with 8.9% of non-drug users.

CONCLUSION

Based on prevalence data from this sample, these results found that non-smokers had unrealistic beliefs about their likelihood of taking up smoking within a year and that many current smokers had equally unrealistic beliefs about giving up the habit. Adolescents had more realistic expectations about future alcohol use. When it came to illicit drug use, adolescents were clear in their beliefs about future use: very few non-users believed they would initiate use whilst current users believed they would continue to use. Many young people were uncertain about future substance use, a position which provides opportunity for drug-education programmes. The hypothesis that younger children would have less realistic beliefs about future use than older children was not supported.

Criminal deterrence as a public health strategy

Deterrence is an established theme in criminal justice, but its role in prevention of assault has been treated with ambivalence and even hostility in medicine. The extent to which offenders can be persuaded, through knowledge of criminal and health risks, not to injure others is emerging from studies of the health effects of firearm and other crime legislation, and from macro-level studies and controlled experiments of police interventions. There is convincing evidence that motorists can be deterred from alcohol-impaired driving, and recognition that specific, targeted, and visible police work and increasing certainty of punishment are effective interventions. By contrast, duration of imprisonment and generic police initiatives such as blanket increases in police numbers seem to have little effect on deterrence, at least in the context of the decline in US homicide rates since 1991, to which demographic and economic factors seem to have contributed little. Together with established and cost-effective preschool education and early family support, targeted policing and increasing rates of conviction should be integrated into strategies for injury prevention.

Emergency medicine and police collaboration to prevent community violence

An important responsibility of emergency departments is the management of injuries sustained in assaults. Most assaults, including many causing serious injury, are not reported and not recorded by the police. This is important because police investigation and the conviction of offenders has a substantial deterrent effect and because information about the circumstances of intentional injury is key to prevention. Recent investigation of ED-police collaboration has shown that many of the injured, and ED staff want offenses to be reported but that there are attitudinal, logistic, and ethical-legal obstacles to achieving this. Organized joint efforts by emergency medicine personnel and police departments, on the basis of a sound legal and ethical framework to protect the rights of both victims and offenders, should deter more violent offenders and would-be violent offenders. They also provide the police with unique aggregate, nonconfidential information that is of substantial help in tackling violence. ED data can be used to measure and refine violence prevention initiatives and are being developed as the basis of a new, independent measure of police performance. Strategies, practical ideas to overcome obstacles, and directions for future research are suggested.

The prevalence of alcohol, cigarette and illicit drug use in a stratified sample of English adolescents

OBJECTIVES

The aim of this study was to assess current levels of regular cigarette, alcohol and illicit drug use in adolescents in light of reported research by Goddard & Higgins (1999).

DESIGN, SETTING, SUBJECTS

Survey of 9742 pupils (aged 11-16) in a stratified sample of 28 schools in four Local Education Authority areas in Northern England, the Midlands and London. Data were collected during the latter part of 1999 and the first 3 months of 2000.

MEASURES

Respondents were asked confidentially about their use, and extent of use, of psychotropic substances (cigarettes, alcohol and illicit drugs).

RESULTS

The prevalence of reported daily cigarette use rose from 4.8% at age 11 to 24.1% at age 16. More girls than boys smoked (13.7%, 9.5%, chi(2) = 39.1, p < 0.0001). Reported monthly use of alcohol rose from 5.1% at age 11 to 36% at 16. Alcohol was drunk more by boys than girls (16.4% and 12.8% respectively, chi(2) = 23.0, p < 0.0001) Reported monthly illicit drug use rose from 0.9% at age 11 to 14.5% at age 16. No overall differences were found between boys and girls.

CONCLUSIONS

The results confirm that rates of cigarette smoking, alcohol and illicit drug use rise rapidly in the early teenage years, with higher rates of smoking in girls and drinking in boys.

Social dimensions of adolescent substance use

OBJECTIVES

The aim of this study was to explore in detail the relationship between various social aspects of young people's lives and substance use and differences in the degree of influence exerted by the different social factors as a function of age. Design, setting, participants. The study was a survey of pupils aged 11-16 in a stratified sample of five English schools. Data from 4516 participants were obtained in relation to their cigarette, alcohol and illicit drug use and their contact with the police, perceived academic achievements and future expectations, religious beliefs, family structure, the importance of family versus peer opinions and suspension from school.

MEASURES

Cumulative, age-specific preferences of substance misuse were compared. Logistic regression was used to rank the various risk factors.

RESULTS

Substantial differences were found between substance users and non-users and the various risk factors being examined. For example, of those who had only been in trouble with the police, 18.8% used illegal drugs compared with 1.6% of those who had not had a police contact and who had no other risk factors. Many of these relationships were age-sensitive. For instance, the negative relationship between belief in God and illicit drug use became stronger as age increased (non-believers: y = 8.1886x - 9.16 R(2) = 0.9484; believers: y = 5.1514x - 8.08 R(2) = 0.9247). These results suggest that, within this sample of English adolescents, there was a strong relationship between substance use and the social factors examined. Although there were differences depending upon whether cigarette, alcohol or illicit drug use was being modelled, logistic regression indicated that the social factors could be ranked in the following order of importance: concurrent use of the second and third substances, having been in trouble with the police, perceived poor academic performance and low future academic expectations, a lack of religious belief, coming from a non-intact family, favouring peer over family opinion and having been suspended from school. Many of these relationships were age-sensitive with substance use peaking at age 15.

CONCLUSION

The models and relationships presented in this paper show that a constellation of behaviours are related to adolescent substance use. Also demonstrated is that behaviours cannot be considered in isolation, but need to be examined from an holistic or biopsychosocial standpoint. These relationships are complex and future research should consider not only causality of adolescent substance use, but also of the aetiology of the satellite behaviours.

Trends in community violence in England and Wales 1995-1998: an accident and emergency department perspective

OBJECTIVES

To identify overall, seasonal, sex and age specific national trends in community violence from an accident and emergency (A&E) department perspective.

DESIGN AND SETTING

Prospective collection of national violence data from a stratified random sample of 33 A&E departments in England and Wales.

METHODS

Data were analysed for the three years from May 1995 to April 1998. Time series statistical methods were used to detect trends among those aged 0-10, 11-17, 18-30, 31-50 and 51 + years.

RESULTS

121475 assaults were identified: 89533 (74%) men sustained injury. Forty five per cent were aged 18-30. The significant trends were an increase in injured women and those aged 31-50. Significant seasonal trends were identified for both sexes and all age groups: peaks were found in July to September and troughs in February to April.

CONCLUSIONS

There was no overall significant change in levels of violence between 1995-1998 from an A&E department perspective. Numbers of women injured and those aged 31-50 increased significantly. The incidence of injury sustained in community violence is biphasic: is highest during July to September and lowest during February to April. National A&E department violence surveillance provides a unique perspective.

Comparison of decisions regarding prophylactic removal of mandibular third molars in Sweden and Wales

OBJECTIVE

To test the hypothesis that Swedish dentists schedule more mandibular third molars for prophylactic removal compared with UK dentists and oral surgeons.

DESIGN

Clinical and radiographic information relating to a stratified sample of 36 disease-free mandibular third molars (equal distribution of males and females, patients' age, angular position and degree of impaction) was presented to 26 general dental practitioners (GDPs) and 10 oral surgeons in Sweden and 18 GDPs and 10 oral surgeons in Wales who were asked to decide whether or not the third molars should be removed.

RESULTS

There was no evidence of any difference in mean number of molars scheduled for removal by the GDPs, but the Swedish oral surgeons scheduled significantly more third molars for removal than oral surgeons in Wales.

CONCLUSION

The less interventionist approach among oral surgeons in the UK may reflect the development and application of authoritative guidelines in the UK and an extensive debate concerning appropriateness of prophylactic removal there.

Secondary bone grafting of alveolar clefts: a densitometric comparison of iliac crest and tibial bone grafts

OBJECTIVE

To evaluate changes in the optical density of secondary alveolar cleft bone grafts obtained from two different donor sites over time and to determine whether one donor site gives a higher recipient bone density than the other.

METHODS

A prospective study was performed evaluating 40 healthy patients with congenital cleft lip and palate undergoing secondary alveolar bone grafting, 20 (14 boys and 6 girls) having iliac crest and 20 (12 boys and 8 girls) receiving tibial bone grafts. Bone harvest and grafting was carried out by one operator (G.P.). Optical density of iliac and tibial grafts measured using a computerized densitometer, was compared at 6 days, 6 weeks, and 3 months. Due to interference from orthodontic appliances, optical density measurements for 16 subjects were not possible, and these patients were excluded from the study. The length of hospital stay postoperatively for both grafting procedures were recorded.

RESULTS

A significant decrease in relative bone density was demonstrated during the 3-month postoperative period in both iliac and tibial bone graft groups (p < .05). The difference in densities between iliac crest and tibial groups were not significantly different at any of the time points (paired t test, p > .05). Subjects undergoing iliac crest grafts stayed an average of 5 days in the hospital postoperatively, compared with subjects with tibial grafts who stayed an average of 3 days postoperatively.

CONCLUSION

Optical density measurements of bone grafted into alveolar clefts, reported here for the first time, provide a valuable objective assessment of graft progress. Tibial and iliac crest grafts gave similar optical densities at recipient sites over the first 3 months. Iliac crest grafts required significantly longer postoperative stay; an important consideration in selecting donor sites for secondary bone grafting.

The outcomes of mandibular third molar removal and non-removal: a study of patients' preferences using a multi-attribute method

The aim was to study patients' preferences about outcomes of mandibular third molar removal and non-removal using multi-attribute utility (MAU) methodology. The study comprised three stages. Stage 1: Elicitation of domains, i.e. main areas of patients' lives which could be affected by third molar removal and non-removal. Stage 2a: Interdomain weighting was obtained by relative weighting of the domains elicited in Stage 1. Stage 2b: Intradomain weighting obtained by patients' designation of values for different health states of each domain. Stage 3: Rating of outcomes. The patients were asked to imagine experiencing a variety of outcomes of mandibular third molar removal and non-removal, described in 19 short vignettes. The numbers of patients interviewed for the three stages were 30, 78, and 55, respectively. Five domains were identified. The mean relative weightings were approximately equal for the domains "Home and social life" and "General health and well-being", followed in order of importance by 'Job and studies" and "Health and comfort of mouth, teeth and gums". "Your appearance" received the lowest mean relative weighting. The vignette, which described the presence of a fluid-filled sac and suggested that this tooth must be removed, received the highest mean preference (least effect on patients' lives). The lowest mean preference (most effect on patients' lives) was generated by the vignette, which stated that the jaw was broken and that the teeth must be wired together for 6 weeks. We conclude that, from the patient's perspective, outcomes of non-removal were preferable to outcomes of mandibular third molar removal.

A controlled trial of three referral methods for patients with third molars

AIM

To evaluate the accuracy, sensitivity and specificity of three primary to secondary care referral strategies.

METHOD

Thirty two primary care dental practitioners (GDPs) were randomly allocated one of three referral strategies: current practice (control strategy); a neural network embedded within a computer program and a paper-based clinical algorithm. One hundred and seven patients were assessed for lower third molar treatment: 47, 30 and 30 in each group, respectively. Clinical details were assessed by a panel of experts against a gold standard for third molar removal (the National Institutes of Health criteria). The accuracy, sensitivity, specificity, positive and negative predictive values were calculated for each strategy.

RESULTS

The referral decisions made by the GDPs in the control group displayed greater accuracy and sensitivity but poorer specificity (0.83; 0.97; 0.22) compared with the neural network (0.67; 0.56; 0.79) and clinical algorithm (0.73; 0.56; 0.93).

CONCLUSIONS

It was concluded that incorporation of the clinical algorithm into primary care was the most appropriate option. The computer neural network performed less well than either current practice or the clinical algorithm.

The minor oral surgery outcome scale: a multi-attribute patient-derived outcome measure

PURPOSE

The purpose of this study was to produce a clinically useful, patient-derived, minor oral surgery outcome scale.

PATIENTS AND METHODS

Seventy-seven consecutive patients scheduled for minor oral surgery were interviewed using semistructured interview techniques to identify those areas of life (domains) that patients believed will be affected by minor oral surgery. These interviews were analyzed by a multidisciplinary panel and a scale based on 5 domains, each with 4 outcome statements was constructed. The domains and outcome statements were weighted in terms of importance by a further consecutive sample of 100 patients using resource allocation and visual analog tasks. An additive mathematical formula was applied to the mean weights for each domain and outcome states to produce the final weighted scale.

RESULTS

Five domains were identified from the interviews and weighted according to their order of importance (0 to 100 scale; 0 = least important). These were general health and well-being (24.6); impact on home/social life (20.8); health and comfort of the mouth, teeth, and gums (20.0); appearance (18.8); and impact on job/studies (15.8).

CONCLUSION

A clinically applicable, multi-attribute outcome scale has been produced that takes into account all determinants of health outcome as perceived by the patient in the context of minor oral surgery. It is completed by selecting a weighted statement from each domain, the sum of which constitutes the patient's health state utility score. The scale has potentially extensive application to both clinical care and research.

The development of an assault patient questionnaire to allow accident and emergency departments to contribute to Crime and Disorder Act local crime audits

OBJECTIVE

To evaluate and refine an assault patient questionnaire to facilitate the contribution of accident and emergency (A&E) departments to Crime and Disorder Act local crime audits.

METHOD

A brief nine item questionnaire was devised in collaboration with the authors of the Home Office British Crime Survey. A prospective sample of 46 consecutive assault patients who attended Cardiff Royal Infirmary A&E department were interviewed by either reception staff or triage nurses. The questionnaire was revised appropriately.

RESULTS

The collection of information in A&E departments about the circumstances of violence was straightforward. Questions about motive for violence and about relationships between the injured and their assailants were problematic.

CONCLUSION

The collection of information relevant to Crime and Disorder Act crime audits was possible without extra resource. Receptionists were found to be the most appropriate staff to record information.

Posttraumatic stress reactions after injury

BACKGROUND

Many individuals experience psychological distress after injury. It is unclear whether poor psychological outcome reflects pretrauma variables.

METHODS

In a prospective, cross-sectional study, 152 accident and emergency department patients with physical injuries and an acute stress reaction completed trauma and psychometric questionnaires, including the Impact of Event Scale and the Hospital Anxiety and Depression Scale.

RESULTS

Although levels of pretrauma social, occupational, and familial functioning were high, and the modal Abbreviated Injury Scale score was 1, there were high levels of psychological distress at 3 weeks. Mean Hospital Anxiety and Depression Scale anxiety and depression scores were 11.8 (SD, 4.4) and 8.7 (SD, 4.4), respectively. The mean total Impact of Event Scale score was 46.0 (SD, 16.1). Stepwise linear regression analysis found unemployment and previous history of trauma to be associated with increased symptoms of traumatic stress.

CONCLUSION

Trauma patients with high levels of pretrauma functioning may develop acute psychological distress. Unemployment and previous trauma increase risk. Psychological wellbeing should be considered in routine injury assessments.

Effectiveness of toughened glassware in terms of reducing injury in bars: a randomised controlled trial

OBJECTIVE

To evaluate the effectiveness, in terms of injury prevention, of toughened pint glassware in bars.

DESIGN

Randomised controlled trial.

SETTING

A random sample of 57 bars in South Wales, West Midlands, and West of England.

SUBJECTS

A total of 1229 bar workers.

INTERVENTION

Complete replacement of pint glasses with annealed (control) or toughened (intervention) glassware.

MAIN OUTCOME MEASURES

Bar staff injuries recorded monthly: number, site, and severity (lifestyle impact; treatment need) of injuries.

RESULTS

Ninety eight bar staff experienced 115 injuries: 43 in the control group, 72 in the intervention group. Adjusting for people at risk gave a relative risk (RR) of 1.48 (confidence interval (CI) 1.02 to 2.15). Similarly, adjusting for hours worked gave RR 1.57 (CI 1.08 to 2.29). Thus, injury rate was 60% higher in the intervention group (p<0.05), with no significant difference in severity. Most were hand injuries requiring first aid. Injuries tended to occur simultaneously in more than one body part in the intervention group, reportedly caused by spontaneous disintegration of toughened glassware. Impact resistance testing showed the energy required to break annealed glass (1.8 +/- 0.2 J) was greater than that for toughened glass (1.4 +/- 0.2 J), though the difference was not significant.

CONCLUSIONS

Glass with lower impact resistance caused more injuries. "Toughened" glassware had lower impact resistance. Standards for toughening need to be developed.

Perceived risk of future pathology associated with pathology-free third molars: a comparison of oral and maxillofacial surgeons and family dentists

OBJECTIVE

To examine and compare practitioners' judgements of risk of future pathology associated with pathology-free disease asymptomatic third molars.

SUBJECTS

10 oral and maxillofacial surgeons and 18 family dentists (90% male) with experience ranging from 5-28 years.

METHOD

Participants were presented with periapical radiographs of 36 asymptomatic, disease-free mandibular third molars and were informed of the age and sex of the patients and the degree of eruption of the third molars. Participants were asked to assess likelihood of future pathology in general, and more specifically, likelihood of root resorption, pericoronitis, periodontitis, cystic change and neoplasia if the third molar was left in situ.

RESULTS

There was significant variation between the 28 raters but not between the two groups. Excepting assessment of future cystic change, there was no evidence that oral and maxillofacial surgeons and family dentists rated the 36 cases in consistently different ways.

CONCLUSIONS

Practitioners varied very considerably in their judgment of the risks of pathology associated with asymptomatic disease-free third molars. Specialisation, did not account for this variation.

Ultrasound-guided needle aspiration of lateral masticator space abscess

Shortly after admission with facial space infection, ultrasound-guided needle aspiration of lateral masticator space abscess was carried out in 2 adult patients. One abscess was associated with pericoronitis and the other with post-extraction infection. Successful aspiration of pus was followed by an instantaneous improvement in the ability to open the mouth for a period of at least 24 hours. This obviated the need for conscious nasoendoscopic intubation and allowed orotracheal intubation for conventional drainage. We concluded that ultrasonography can be beneficial in the management of orofacial infections.

The cost, effectiveness and cost effectiveness of removal and retention of asymptomatic, disease free third molars

PURPOSE OF INVESTIGATION

The study was undertaken to identify the least costly, most effective and most cost-effective management strategy for asymptomatic, disease free mandibular third molars.

METHODS AND PATIENTS

A decision tree model of the outcomes of mandibular third molar retention and removal was constructed. Probability data for possible outcomes were obtained from a comprehensive literature review and entered into the decision tree. The cost to the NHS in treating each outcome was calculated. 100 patients attending the oral surgery clinics, University of Wales Dental Hospital rated the effect of each outcome on their own life. The cost and effectiveness data for each outcome were entered into the decision tree and the analyses were conducted by 'folding back' the decision tree based on the probabilities.

MAIN FINDINGS

Mandibular third molar retention was less costly (170 Pounds), more effective (69.5 effectiveness units on a 100 point scale) and more cost-effective (2.43 Pounds per unit of effectiveness) than removal (226 Pounds, 63.3 and 3.57 Pounds respectively). These findings were sensitive to changes in the probability of pericoronitis, periodontal disease and caries.

PRINCIPAL CONCLUSIONS

Mandibular third molar retention is less costly to the NHS, more effective for the patient and more cost-effective to both parties than removal. However, should the likelihood of developing pericoronitis, periodontal disease and caries increase substantially then removal becomes the more cost-effective strategy.

Effect of closed circuit television on urban violence

OBJECTIVE

To evaluate the effect of city and town centre closed circuit television (CCTV) surveillance on violence in terms of accident and emergency (A&E) department and police assault data.

METHODS

A&E department and local police assault data in three centres in Wales (Cardiff, Swansea, and Rhyl) two years before and two years after the installation of CCTV were studied. British Crime Survey and police crime statistics were used as control data.

RESULTS

A&E records of 24,442 assault patients and 3228 violent offences recorded by the police were studied. Data from two A&E departments (Swansea (+3%) and Rhyl (+45%)) showed increases in recorded assaults after CCTV installation but a decrease (12%) in the largest centre, Cardiff. There was an overall reduction in town/city centre violence from the A&E department perspective of 1% in the two years after CCTV installation. In contrast, police data demonstrated changes in the opposite direction (-44%, -24%, and +20% respectively) contributing to an overall decrease of 9%. British Crime Survey and police statistics for England and Wales demonstrated no overall change and a 16% increase respectively.

CONCLUSIONS

City centre CCTV installation had no obvious influence on levels of assaults recorded in A&E departments. There was a negative relationship between police and A&E recording in all three centres. A&E departments are important and unique sources of information about community violence.

Factors influencing nerve damage during lower third molar surgery

OBJECTIVE

To investigate relationships between pathology, eruption status, age, anaesthetic modality and nerve damage during lower third molar surgery.

DESIGN

Single centre prospective study.

SETTING

Oral surgery out-patient clinics.

SUBJECTS

367 patients unselected for age, gender or social class, scheduled for lower third molar removal. At 1 week, any evidence of iatrogenic nerve damage was recorded. Patients with altered lingual and/or labial sensation were followed up for 6 months.

RESULTS

718 lower third molars were removed from 250 males and 117 females. 96 removals (13.4%) were associated with altered lingual, labial or buccal sensation. There were no significant associations between nerve damage and eruption status, age and pre-operative pathology. There was a highly significant difference in the incidence of nerve damage between LA removal (3%) and GA removal (18%) (chi-squared = 17.18; f = 2; P < 0.01) but no significant associations between surgical difficulty and nerve damage within each of the two groups.

CONCLUSIONS

Lingual and inferior alveolar nerve damage was five times more frequent when lower third molars were removed under general anaesthesia rather than local anaesthesia. This could not be explained in terms of surgical difficulty, pre-operative pathology, age or anatomical position.

The circumstances and scope for prevention of maxillofacial injuries in cyclists

A prospective study of cyclists with maxillofacial injuries attending Accident and Emergency departments in South Wales was carried out over a 12 month period. 65% of the 104 accident victims were aged under 14 years, and 81% were male. Only 14% were wearing helmets. Injuries were mapped to 9 facial zones. Nearly half the victims sustained injury to the central facial zone. There was an association between head injury (HI) and the location of impact on the face (p < 0.0001 Chi-square = 41 df = 8), the nature of the accident (p < 0.012 Chi-square = 10.9 df = 3), and type of injury in the impact zone (p < 0.007 Chi-square = 13.4 df = 4). More patients with facial injuries but without facial bone fractures sustained HIs than those with fractures. The facial skeleton may protect the brain by absorbing impact. The high incidence of midface injuries could be reduced by incorporating a facebar in helmet design.

Impact of third molar removal on demands for postoperative care and job disruption: does anaesthetic choice make a difference?

A prospective cohort study was undertaken to investigate the influences of anaesthetic modality and surgical difficulty on social reintegration and demands on health services after third molar removal. The study was undertaken at the Oral and Maxillofacial Surgery Department, Cardiff Dental Hospital. Of 444 patients, 266 (60%) had their third molars removed. The main outcome measures included anaesthetic modality, surgical difficulty (WHARFE scores), utilisation of health services, effects on work, school and home life. In all, 101 (40%) patients were treated under local anaesthesia (LA) +/- intravenous (i.v.) sedation and 165 (60%) under general anaesthesia (GA); 81 (49%) as inpatients and 84 (51%) as day cases. Of these patients, 38 (14%) returned to the hospital and 74 (28%) utilised primary care services postoperatively in addition to a standard review appointment. Patients treated under GA made more demands on primary care services (chi 2 = 6.41, df = 2, P < 0.05) and took more time away from work (P < 0.05). Patients underestimated the time they needed to recover. There was similar disruption to job, college and home life. There were no links between disruption and particular anaesthetic modalities and surgical difficulty. Surgery under GA was linked to increased postoperative demands on primary care, but not secondary care, and to longer job disruption. This could not fully be attributed to surgical difficulty.

Brief interventions for patients with alcohol-related trauma

Patients who have sustained alcohol-related injuries are frequently treated in departments of oral and maxillofacial surgery. Often, an alcohol intervention will not be possible in accident and emergency departments due to intoxication but, when attending out-patient clinics for follow-up, patients are usually sober. This presents a unique opportunity for encouraging patients to review their alcohol consumption at a time when their facial injury may make them more receptive to advice. This article reviews the convincing evidence of the effectiveness of advice and brief interventions designed to be incorporated into standard out-patient consultations and describes practical screening of patients for harmful drinking, the Stages of Change Model of behaviour change and motivational interviewing for facilitating behavioural change.

Choice of anaesthetic and healthcare facility for third molar surgery

A prospective investigation was carried out to find out which factors affected the choice of anaesthetic for 444 consecutive patients (153 male, 291 female, age range 15-85) listed for extraction of third molars. Two hundred and seventy-two were listed for treatment under general anaesthesia, 120 (44%) as inpatients and 152 (60%) as day cases. The remaining 144 (32%) patients were to be treated under local anaesthesia and 28 (6%) with additional intravenous sedation. Logistic regression analysis showed that difficulty of surgery, patients' anxiety, patients' preferences, medical history, and number of teeth to be removed were important predictors of choice of anaesthetic. From an anaesthetist's perspective, many more patients should have been treated under local anaesthesia with intravenous sedation and fewer should have been listed for inpatient extraction under general anaesthesia.