Prevalence of human immunodeficiency virus and associated risk behaviour in injection drug users in Toronto.

During 1989-90, interviews were conducted with 582 current injection drug users in the City of Toronto, 535 of whom also provided blood and/or saliva for anonymous unlinked HIV antibody testing. The rate of seropositivity identified was 4.3% (95% CI 3-6). The subjects were predominantly male, with a mean age of 28.3. The commonest drug of choice was cocaine (70%). Forty-six percent of the subjects reported using someone else's needle in the preceding six months, 60% of these indicating that they always cleaned it first. Eighty-one percent of those interviewed had been in jail at some time since they began injecting; 25% of these had injected while in custody, and of these 61% had shared injection equipment. Eighty-two percent of the men and 85.4% of the women reported opposite sex partners in the previous six months. Only about 20% of men reported consistent condom use, while 22% of females reported condom use at least 75% of the time.

A comparison of the determinants of safe injecting and condom use among injecting drug users.

A sample of 582 injecting drug users were interviewed as part of an evaluation of an AIDS prevention programme for drug users. This paper examines the biographic and predispositional determinants of five HIV preventive behaviours--equipment sharing (not receiving and not giving) and and condom use (with regular partners, casual partners and sex clients). A two-stage sequential approach was adopted for a logistic regression analysis. Initially, to model each of the five preventive behaviours, biographical and drug use variables were entered. In a second set of models, behavioural predisposition factors were included. Age, drug use and prison experience correlate with variables in both models, although not consistently in the same direction. While a predisposition to reject sharing correlates with safer rejecting and condom use, the predisposition to safer sex only correlates with condom use. Needle exchange programmes that only target the individual would seem to be inadequate. To enhance targeted interventions changes in public and agency policy that create a social environment conductive to behaviour change are required.

PIP: Interviews were conducted with 582 intravenous (IV) drug users aged 16-55 (85.9% of whom were male) living in Toronto, Canada, so researchers could examine the biographic and predispositional determinants of HIV preventive behaviors: equipment sharing (not receiving and not giving) and condom use (with regular partners, casual partners, and sex clients). This study was part of an evaluation of one of Canada's first HIV prevention programs for IV drug users, which included education, counseling, needle and syringe exchange, and an environmental campaign to Keep the Needles Off the Street. Cocaine was the most commonly abused drug (95.4%) in the last six months. Condom use was highest with sex clients (53.1%), followed by regular partner (43.1%) and casual partner (30.8%). The researchers had adopted a two-stage sequential approach for a logistic regression analysis. They first applied biographical and drug use variables to model each of the preventive behaviors. They then included the behavioral predisposition factors in a second set of models. Younger IV drug users were more likely to practice safer sex and safer needle use than older IV drug users. IV drug users who had been in prison were more likely to use condoms with sex clients and not to give used equipment to others. Among all substance types, only heroin and barbiturate use were linked to sexual risk. The predisposition to reject equipment sharing related to safe injecting and condom use, while the predisposition to accept safer sex only related to condom use, suggesting that the mechanisms for behavior change associated with safer sex and equipment sharing may vary. Needle exchange programs exist for IV drug users and focus only on the individual. These findings suggest that these programs appear to be ineffectual. Improvement of targeting and prevention strategies, including creation of a social environment conducive to change, is needed.

Biographical characteristics of injection drug users and behavioural predispositions related to HIV prevention and drug use.

OBJECTIVE: This paper presents a preliminary analysis of the determinants of selected behavioural predispositions toward HIV prevention among injection drug users. METHOD: An exploratory factor analysis was used to group attitudinal, behavioural intention and change statements into five predisposing factors and the correlates with these were examined using general linear regression. RESULTS: The analysis demonstrates that many IDUs have responded to AIDS and highlights the characteristics of those who are predisposed to unsafe practices. Predispositions toward safer sex appear to be contextually determined, and needle-sharing determined by socio-behavioural history. CONCLUSIONS: The data emphasize the need for prevention programs in educational and correctional systems along with community-wide harm reduction and HIV prevention strategies, especially for younger persons. For older drug users, there may be a need for more intensive rehabilitation programs. Some evidence suggest that greater attention be given to the type of drug dependence when focusing programs.

Five-year study of surgical rates in Ontario's counties.

The surgical rates for eight operations (hysterectomy, tonsillectomy/adenoidectomy, cholecystectomy, prostatectomy, appendectomy, mastectomy, colectomy and cesarean section) done in Ontario's 44 counties from 1973 to 1977 were examined. There was considerable variation among the counties for all the operations studied, although the degree of intercounty variation decreased over the 5 years. Differences in resources (hospital beds and surgeons) explained little of the variation in the rates, but this may be because people crossed county lines for certain operations. Although some counties had consistently high or low rates for individual operations during the 5-year period, only four had consistently high rates for four or more operations, and only five had consistently low rates for four or more. The five counties with teaching health science centres had the highest ratios of specialists and surgeons to population, and, with the exception of one county in 1973, had above-average numbers of hospital beds. Despite the greater resources in these counties, their residents had consistently low rates for cholecystectomy, appendectomy, mastectomy and tonsillectomy/adenoidectomy. However, three of these counties had the highest rates for cesarean section. The variation in the rates is likely due to lack of agreement about indications for surgery or to variation in the use of technology rather than to differences in the incidence or prevalence of disorders.

Measuring surgical decision-making with hypothetical cases.

Hypothetical clinical cases were used to investigate surgical decision-making in relation to surgical rates across Ontario. Six procedures were studied (cholecystectomy, colectomy, inguinal herniorrhaphy, hysterectomy, cesarean section and tonsillectomy-adenoidectomy), and substantial differences of opinion regarding the choice of surgical or nonsurgical treatment were recorded. The decision to operate, however, was not made more frequently in Ontario counties with high operative rates, and none of the demographic variables studied were correlated with the decision to operate. Other variables that might have affected operative rates were not taken into account. There were also differences of opinion in referral decisions, but generally internists and pediatricians were less likely to refer the hypothetical cases to surgeons than were family physicians.

Ten-year trends in Canada for selected operations.

Of 16 operations common in Canada the national rates over a 10-year period for the 9 discretionary procedures varied much more than those for the nondiscretionary operations. The rates of tonsillectomy and adenoidectomy, hemorrhoidectomy, varicose vein stripping and appendectomy decreased substantially, whereas those of extraction of lens, cesarean section and colectomy increased. The rates of hysterectomy and cholecystectomy first increased and then decreased. With the exception of Newfoundland the provinces generally followed these trends. Neither the Canadian nor the provincial rates were significantly associated with the availability of hospital beds or surgeons. Factors other than resources probably accounted for much of the variation among the provinces.

A decade of surgery in Canada, England and Wales, and the United States.

Between 1966 and 1976, overall surgical rates in Canada remained relatively unchanged and consistently 60% higher than those in England and Wales. Overall United States rates were the highest of the three countries and increased 25% over the ten years. Numbers of surgeons per capita increased in both Canada and England and Wales but overall surgical rates in the two operative rates increased. During the decade, Canada had more hospital beds per capita than the United States while England and Wales had the fewest. Since 1970, the percentage of gross national product spent on health care has been greatest in the United States, intermediate in Canada, and lowest in England and Wales. These expenditures may better reflect national priorities and value and, thus be more important than per capita numbers of hospital beds or surgeons in explaining the cross-national difference in rates of surgery.

Use of hypothetical cases to investigate indications for surgery.

Hypothetical case histories were used to investigate judgements to operate or to refer. Six procedures (cholecystectomy, colectomy, inguinal herniorrhaphy, tonsillectomy, cesarean section and hysterectomy) were selected and four cases were developed for each procedure. Control cases were those on which surgeons agreed and test cases were those on which there was disagreement regarding surgical or nonsurgical treatment. The case histories were mailed to 131 surgeons and referring physicians in one Ontario county. Among the 98 respondents 75% indicated that the cases were typical of problems seen in practice. This paper reviews the case histories and results for cholecystectomy and hysterectomy. Two of the cholecystectomy cases were controls with 83% of the surgeons opting for nonsurgical treatment in one and 94% opting for surgery in the other. For hysterectomy there was one control case with 90% agreement among gynecologists to operate; in the three test cases from 25% to 75% of the gynecologists favoured surgery. The combined results of all test cases indicated that younger surgeons were less likely to select operation than older surgeons. No consistent sociodemographic associations with the referral decision could be determined for referring physicians, possibly owing to the small sample size.

Universal health insurance in Canada: history, problems, trends.

This paper describes the universal health insurance program in Canada and identifies the historical events and social values leading to its adoption. Universal hospital insurance was adopted in 1958, ten years before medical insurance, as a result hospital-based patterns of practice were solidified. Through cost sharing, the federal government influenced the provinces to enact relatively uniform universal plans. From 1951 to 1971 health care expenditures rose rapidly to 7.3% of the gross national product (GNP), but have since decreased and stabilized at about 6.9%. In contrast, health care in the United States represents 8.6% of GNP. Hospital use also increased rapidly in Canada to 1970 but appears to have stabilized and decreased slightly in this decade. Physician incomes rose rapidly before 1971, but since then the increases have slowed and relative incomes of physicians have fallen. Althouth the percent of GNP spent for health care has leveled, there are still substantial annual increases in expenditures that are paid for by government. Two federal initiatives, Bill C-37 and the Lalonde Report, have their roots in cost containment; Bill C-37 transfers greater taxing authority from the federal government to the provinces. To meet the goal of containing costs, provincial governments are moving in the direction of regionalization, decentralization, and greater coordination. In the short term, the provinces have limited hospital budgetary increases to percentages less than the rate of inflation. Cost constraints may be long overdue. Imposing fiscal limits encourages rational planning. It does not appear that the health of Canadians will be adversely affected or essential benefits curtailed by present budgetary restrictions or reorganization.