Changes in substance use associated with emergency room and primary care services utilization in the United States general population: 1995-2000

OBJECTIVE: The purpose of this study was to compare changes in the prevalence of heavy problem drinking and drug use among those obtaining emergency room (ER), primary care, and other health care services between 1995 and 2000 in the U.S. general population. METHOD: Data analyzed are from the Alcohol Research Group's 1995 (n = 4925) and 2000 (n = 7612) National Alcohol Surveys. Data for the 1995 survey was based on face-to-face interviews in respondents' homes in the 48 contiguous states, while the 2000 interview was a random-digit dialing computer-assisted telephone interview of the household population in all 50 states. RESULTS: Those reporting any health services utilization were less likely to report heavy drinking, two or more alcohol problems, and symptoms of alcohol dependence during the previous year in 2000 compared with 1995, but heavy or problem drinking was not predictive of health services utilization at either time. Controlling for demographic characteristics and health insurance coverage, illicit drug users were almost twice as likely [odds ratio (OR) = 1.85] compared with nonusers, to report ER utilization, and one and a half times more likely (OR = 1.55) to report primary care utilization during the past year in the 2000 survey, but drug use was not significantly predictive of health services utilization in 1995. CONCLUSIONS: These data suggest that while those alcohol-involved individuals were no more likely than others to use ER and primary care services in either 1995 or 2000, those drug-involved individuals were more likely to do so in 2000, perhaps related to the fact that these individuals may be incurring more health problems associated with their drug use that require medical attention. While identification and intervention with problem drinkers in clinical settings has received a great deal of attention, drug users may be overrepresented in health service settings, and such settings also may provide a window of opportunity for screening and intervention for a reduction in drug-related problems.     

Screening for alcohol problems in the U.S. general population: comparison of the CAGE,RAPS4, and RAPS4-QF by gender,ethnicity, and service utilization. Rapid Alcohol Problems Screen

BACKGROUND: The purpose of this study was to compare the performance (sensitivity and specificity) of two brief screening instruments, CAGE and the Rapid Alcohol Problems Screen 4 (RAPS4), against ICD-10 and DSM-IV criteria for alcohol dependence and abuse in a representative sample of the U.S. adult household population by gender, ethnicity, and service utilization (emergency room and primary care) in the last year. METHODS: Data are from the Alcohol Research Group's 2000 National Alcohol Survey (n = 7612), which is a computer-assisted telephone interview survey of the U.S. general population 18 and over in all 50 U.S. states and the District of Columbia. RESULTS: Sensitivity of the RAPS4 (0.86) was better than the CAGE (0.67) given similar specificity (0.95 vs. 0.98) and outperformed the CAGE for alcohol dependence across all gender, ethnic, and service utilization groups, except among blacks and Hispanics. The RAPS4 also performed equally well for females and males (0.88 vs. 0.85), whereas sensitivity of the CAGE was lower for females. Although sensitivity of the RAPS4 was better than the CAGE for alcohol abuse, sensitivity was low for both (0.56 and 0.36, respectively). When quantity-frequency (QF) questions (drinking five or more drinks on at least one occasion during the last year and drinking as often as once a month during the last year) were added to the RAPS4, the RAPS4-QF performed significantly better for alcohol abuse and outperformed the CAGE at a cut point of one across all gender, ethnic, and service utilization groups. The RAPS4-QF appeared to be most sensitive for alcohol abuse among both males and females reporting emergency room use (0.90). CONCLUSIONS: The data suggest that the RAPS4 outperforms the CAGE in this general population sample. The addition of a QF question to the RAPS4 improves performance in relation to sensitivity for alcohol abuse, and the RAPS4 and RAPS4-QF may be the instruments of choice in brief screening for alcohol use disorders. Additional research is needed to further explore these issues.     

Injury and the Role of Alcohol: County-Wide Emergency Room Data

The purpose of this study is to describe variables associated with injury in an emergency room (ER) sample that is representative of an entire U.S. county. A probability sample ( n = 3717) of ER patients from the county hospital, 3 of the 0 community hospitals, and the three health maintenance organization hospitals in a single Northern California county were breathalyzed and interviewed at the time of the ER visit. Injured were most likely to consume only 1 or 2 drinks within el hr of injury occurrence. Twenty-three percent reported feeling drunk at the time of the event, and of these, 45% felt the event would not have happened if they had not been drinking. Breathalyzer reading, feeling drunk at the time of the event, and quantity-frequency (Q-F) of usual drinking were found to be predictive of admission to the ER with an injury, whereas breathalyzer reading, Q-F, and being injured in someone's home were predictive of reporting drinking prior to injury. Although feeling drunk at the time of the event and usual drinking patterns are predictive of injury occurrence, drinking prior to the event may not entail large quantities of alcohol consumed, but relatively small amounts consumed in close proximity to the injury event. These alcohol consumption variables may vary, however, depending on the type, cause, and severity of injury.     

The Mexican migration to the United States and substance use in northern Mexico

Aims   To examine the impact of migration to the United States on substance use and substance use disorders in three urban areas of northern Mexico.
Design   Cross-sectional survey of immigration-related experiences and life-time and past-year alcohol and drug use, in a representative sample of respondents aged 12–65 years.
Setting   Interviews were conducted in the cities of Tijuana, Ciudad Juarez and Monterrey during 2005. Respondents were classified into three groups: (i) 'return migrants', (ii) 'relatives of migrants' and (iii) 'others in the general population'.
Findings   A total of 1630 completed interviews were obtained for a response rate of 70.5%. 'Return migrants' were more likely to have used alcohol, marijuana or cocaine at least once in their life-time and in the last 12 months, more likely to develop a substance use disorder and more likely to have a 12-month substance use disorder compared with 'others in the general population'. Among 'return migrants', longer length of time in the United States and type of work performed as an immigrant were related to higher prevalence of substance use. Among 'relatives of migrants', migration experiences were not associated with increased prevalence of substance use compared with 'others in the general population'.
Conclusion   This study found a link between migration to the United States and the transformation of substance use norms and pathology in Mexico. Future research on pre-migration involvement in substance use and data on the timing of events among return migrants is needed. Public health measures are likely to require cross-border coordination of research and service development.     

Episodic alcohol use and risk of nonfatal injury

Usual and acute alcohol consumption are important risk factors for injury. Although alcohol-dependent people are thought to be at increased risk of injury, there are few reports suggesting that their risk is greater than that of nondependent alcohol users in a given episode of alcohol use. The authors conducted a case-crossover analysis of data on 705 injury patients from a hospital emergency department in Mexico City, Mexico, collected in 2002. The majority of the sample was male (60%) and over 30 years old (51%). With use of a multiple matching approach that took into account three control time periods (the day prior to the injury, the same day in the previous week, and the same day in the previous month), the estimated relative risk of injury for patients who reported having consumed alcohol within 6 hours prior to injury (17% of the sample) was 3.97 (95% confidence interval: 2.88, 5.48). This increase in the relative risk was concentrated within the first 2 hours after drinking; there was a positive association of increasing risk with increasing number of drinks consumed. These data suggested that relative risk estimates were the same for patients with and without alcohol use disorders.     

Risk of injury after alcohol consumption: a case-crossover study in the emergency department

This paper reports a case-crossover analysis in a sample of 961 patients who consulted the emergency department (ED) due to an injury in Santa Clara, California, and in Pachuca, Mexico. In the analysis in which usual alcohol consumption during the last 12 months served as the control value, the estimated relative risk of injury in the hour after alcohol consumption, as compared with no alcohol consumption during that time, was 4.33 (CI, 3.55-5.27). After controlling for alcohol use in the 1-h period before injury, the relative risks for consecutive 1-h periods (2-6 h) before the injury were not significantly greater than one, indicating that the induction time was less than 1 h. The relative risk varied greatly depending on race-ethnicity and acculturation among the Hispanics in Santa Clara, with Mexicans in Pachuca showing the highest risk and the high acculturation group in Santa Clara showing the lowest risk. Violence-related injuries were associated with higher relative risk. Relative risk also varied depending on the presence of alcohol dependence and usual frequency of drunkenness: patients with alcohol dependence and patients with high frequency of usual drunkenness had lower risks than patients without alcohol dependence and with lower self-reported episodes of drunkenness in the last year. When blood alcohol content at ED admission was used instead of self-reported alcohol consumption, similar results were obtained. These findings have important public health consequences. Each episode of alcohol consumption results in an increase in the short-term risk for an injury, especially for a violence-related injury. Patients with the lowest usual involvement with alcohol are subject to a higher elevation in their risk for an injury immediately after alcohol consumption compared to patients who drink more heavily.     

Drinking patterns and problems in emergency services in Poland

AIMS: To examine drinking patterns and problems in emergency services in Poland, where both alcohol consumption and the health care system have undergone enormous recent change. METHODS: A probability sample of 734 emergency service patients was breathalyzed and interviewed in a large public hospital in Warsaw, Poland. RESULTS: 2.5% of the sample was breathalyzer positive; all were male and injured. Injured males were significantly more likely to report heavy problem drinking than non-injured, but no differences were found for females. Among injured males who reported drinking prior to the event, close to 50% reported feeling drunk, and over 75% attributed a causal association of their drinking with injury. CONCLUSIONS: These data point to substantial alcohol-involvement on the part of injured males in this population, and suggest emergency services may be a productive venue for identifying those patients who would benefit from a brief intervention.     

A brief screening instrument for problem drinking in the emergency room: the RAPS4. Rapid Alcohol Problems Screen

OBJECTIVE: While a number of brief screening instruments for identifying problem drinkers have been tested in clinical settings, instruments have not been found to perform as well for women as for men, or to perform uniformly across ethnic groups. The purpose of this study was to evaluate a shortened version of the RAPS (Rapid Alcohol Problems Screen) in an emergency room (ER) sample (N = 1,429; 51% female) and to determine the most efficient ordering of the items. METHOD: The sensitivity and specificity of each of the RAPS items were examined against current ICD-10 and DSM-IV criteria for alcohol dependence, and separately for harmful drinking or abuse. A four-item version of the RAPS (the RAPS4) was analyzed separately for men and for women, and for blacks, Hispanics and whites/others. RESULTS: Among the five original RAPS items, four items were found to be most efficient, with the single item of feeling guilt or remorse after drinking identifying 83% of those with alcohol dependence and 44% of those meeting criteria for harmful drinking or abuse. A positive response to any one of the four items (RAPS4) gave a sensitivity of 93% and specificity of 87% for alcohol dependence, and sensitivity and specificity were consistently high across gender and ethnic subgroups. Sensitivity and specificity for harmful drinking or abuse were lower (55% and 79%, respectively). CONCLUSIONS: Because of its brevity and high performance across demographic subgroups, the RAPS4 may hold promise in screening for alcohol use disorders in patient populations, and its utility warrants further evaluation in clinical settings.