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ObjectivesTo evaluate associations between alcohol brief intervention (BI) in primary care and 12-month drinking outcomes and 18-month health outcomes among adults with hypertension and type 2 diabetes (T2D).DesignA population-based observational study using electronic health records data.SettingAn integrated healthcare system that implemented system-wide alcohol screening, BI and referral to treatment in adult primary care.ParticipantsAdult primary care patients with hypertension (N=72 979) or T2D (N=19 642) who screened positive for unhealthy alcohol use between 2014 and 2017.Main outcome measuresWe examined four drinking outcomes: changes in heavy drinking days/past 3 months, drinking days/week, drinks/drinking day and drinks/week from baseline to 12-month follow-up, based on results of alcohol screens conducted in routine care. Health outcome measures were changes in measured systolic and diastolic blood pressure (BP) and BP reduction ≥3 mm Hg at 18-month follow-up. For patients with T2D, we also examined change in glycohaemoglobin (HbA1c) level and ‘controlled HbA1c’ (HbA1c<8%) at 18-month follow-up.ResultsFor patients with hypertension, those who received BI had a modest but significant additional −0.06 reduction in drinks/drinking day (95% CI −0.11 to −0.01) and additional −0.30 reduction in drinks/week (95% CI −0.59 to −0.01) at 12 months, compared with those who did not. Patients with hypertension who received BI also had higher odds for having clinically meaningful reduction of diastolic BP at 18 months (OR 1.05, 95% CI 1.00 to 1.09). Among patients with T2D, no significant associations were found between BI and drinking or health outcomes examined.ConclusionsAlcohol BI holds promise for reducing drinking and helping to improve health outcomes among patients with hypertension who screened positive for unhealthy drinking. However, similar associations were not observed among patients with T2D. More research is needed to understand the heterogeneity across diverse subpopulations and to study BI’s long-term public health impact.

Background The Affordable Care Act (ACA) has increased insurance coverage for people with HIV (PWH) in the United States. To inform health policy, it is useful to investigate how enrollment through ACA Exchanges, deductible levels, and demographic factors are associated with health care utilization and HIV clinical outcomes among individuals newly enrolled in insurance coverage following implementation of the ACA. Methods Among PWH newly enrolled in an integrated health care system (Kaiser Permanente Northern California) in 2014 ( N  = 880), we examined use of health care and modeled associations between enrollment mechanisms (enrolled in a Qualified Health Plan through the California Exchange vs. other sources), deductibles (none, $1–$999 and > = $1000), receipt of benefits from the California AIDS Drug Assistance Program (ADAP), demographic factors, and three-year patterns of health service utilization (primary care, psychiatry, substance treatment, emergency, inpatient) and HIV outcomes (CD4 counts; viral suppression at HIV RNA < 75 copies/mL). Results Health care use was greatest immediately after enrollment and decreased over 3 years. Those with high deductibles were less likely to use primary care (OR = 0.64, 95% CI = 0.49–0.84, p  < 0.01) or psychiatry OR = 0.59, 95% CI = 0.37, 0.94, p  = 0.03) than those with no deductible. Enrollment via the Exchange was associated with fewer psychiatry visits (rate ratio [RR] = 0.40, 95% CI = 0.18–0.86; p  = 0.02), but ADAP was associated with more psychiatry visits (RR = 2.22, 95% CI = 1.24–4.71; p  = 0.01). Those with high deductibles were less likely to have viral suppression (OR = 0.65, 95% CI = 0.42–1.00; p  = 0.05), but ADAP enrollment was associated with viral suppression (OR = 2.20, 95% CI = 1.32–3.66, p  < 0.01). Black (OR = 0.35, 95% CI = 0.21–0.58, p  < 0.01) and Hispanic (OR = 0.50, 95% CI = 0.29–0.85, p  = 0.01) PWH were less likely to be virally suppressed. Conclusions In this sample of PWH newly enrolled in an integrated health care system in California, findings suggest that enrollment via the Exchange and higher deductibles were negatively associated with some aspects of service utilization, high deductibles were associated with worse HIV outcomes, but support from ADAP appeared to help patients achieve viral suppression. Race/ethnic disparities remain important to address even among those with access to insurance coverage.

Excessive alcohol consumption is associated with increased incidence of several medical conditions, but few nonveteran, population-based studies have assessed levels of alcohol use across medical conditions. To examine associations between medical conditions and alcohol consumption levels in a population-based sample of primary care patients using electronic health record data. This cross-sectional study used separate multinomial logistic regression models to estimate adjusted associations between 26 medical conditions and alcohol consumption levels in a sample of 2 720 231 adult primary care patients screened for unhealthy drinking between January 1, 2014, and December 31, 2017, then only among those reporting alcohol use. The study was conducted at Kaiser Permanente Northern California, a large, integrated health care delivery system that incorporated alcohol screening into its adult primary care workflow. Data were analyzed from June 29, 2018, to February 7, 2020. The main outcome was level of alcohol use, classified as no reported use, low-risk use, exceeding daily limits only, exceeding weekly limits only, or exceeding daily and weekly limits, per National Institute on Alcohol Abuse and Alcoholism guidelines. Other measures included sociodemographic, body mass index, smoking, inpatient and emergency department use, and a dichotomous indicator for the presence of 26 medical conditions in the year prior to the alcohol screening identified using International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) and ICD-10-CM diagnosis codes. Among the 2 720 231 included patients, 1 439 361 (52.9%) were female, 1 308 659 (48.1%) were white, and 883 276 (32.5%) were aged 18 to 34 years. Patients with any of the conditions (except injury or poisoning) had lower odds of drinking at low-risk and unhealthy levels relative to no reported use compared with those without the condition. Among 861 427 patients reporting alcohol use, patients with diabetes (odds ratio [OR], 1.11; 95% CI, 1.08-1.15), hypertension (OR, 1.11; 95% CI, 1.09-1.13), chronic obstructive pulmonary disease (COPD; OR, 1.16; 95% CI, 1.10-1.22), or injury or poisoning (OR, 1.06; 95% CI, 1.04-1.07) had higher odds of exceeding daily limits only; those with atrial fibrillation (OR, 1.12; 95% CI, 1.06-1.18), cancer (OR, 1.06; 95% CI, 1.03-1.10), COPD (OR, 1.15; 95% CI, 1.09-1.20), or hypertension (OR, 1.37; 95% CI, 1.34-1.40) had higher odds of exceeding weekly limits only; and those with COPD (OR, 1.15; 95% CI, 1.07-1.23), chronic liver disease (OR, 1.42; 95% CI, 1.32-1.53), or hypertension (OR, 1.48; 95% CI, 1.44-1.52) had higher odds of exceeding both daily and weekly limits. Findings suggest that patients with certain medical conditions are more likely to have elevated levels of alcohol use. Health systems and clinicians may want to consider approaches to help targeted patient subgroups limit unhealthy alcohol use and reduce health risks.

Objectives. To examine changes in HIV-positive patient enrollment in a large health care delivery system before and after key Affordable Care Act (ACA) provisions went into effect in 2014. Methods. Analyses compared HIV-positive patients newly enrolled in Kaiser Permanente Northern California between January and June 2012 (n = 339) to those newly enrolled between January and June 2014 through the California insurance exchange or via other mechanisms (n = 549). Results. After the ACA, the HIV-positive patient enrollment increased. These new enrollees were more likely to be male (93.6% vs 89.1%; P = .01), to be enrolled in high-deductible benefit plans (≥ $1000; 18.8% vs 5.5%; P = .01), and to have better HIV viral control (HIV RNA levels below limits of quantification 79.5% vs 73.6%; P = .05) compared with pre-ACA new enrollees. Among post-ACA new enrollees, there were more patients in the lowest and highest age groups. Post-ACA exchange enrollees (22%) were more likely to be male and to have high-deductible plans than those enrolled through other mechanisms. Conclusions. More men, higher deductibles, and better HIV viral control characterize newly enrolled HIV-positive patients after the ACA in California. Public health implications. Evolving characteristics of HIV-positive enrollees may affect HIV policy, patient care needs, and service utilization.

Background: The importance of a continuing care approach for substance use disorders (SUDs) is increasingly being recognized. Our prior research found that a Continuing Care model for SUDs that incorporates 3 components (regular primary care, and specialty SUD and psychiatric treatment as needed) is beneficial to long-term remission. The study builds on this work to examine the cost implications of this model. Objectives: To examine associations between receiving Continuing Care and subsequent health care costs over 9 years among adults entering outpatient SUD treatment in a private nonprofit, integrated managed care health plan. We also compare the results to a similar analysis of a demographically matched control group without SUDs. Study Design: Longitudinal observational study. Measures: Measures collected over 9 years include demographic characteristics, self-reported alcohol and drug use and Addiction Severity Index, and health care utilization and cost data from health plan databases. Results: Within the treatment sample, SUD patients receiving all components of Continuing Care had lower costs than those receiving fewer components. Compared with the demographically matched non-SUD controls, those not receiving Continuing Care had significantly higher inpatient costs (excess cost = $65.79/member-month; P < 0.01) over 9 years, whereas no difference was found between those receiving Continuing Care and controls. Conclusions: Although a causal link cannot be established between receiving Continuing Care and reduced long-term costs in this observational study, the findings reinforce the importance of access to health care and development of interventions that optimize patients receiving those services and that may reduce costs to health systems.

Objective. To examine the impact of integrating medical and substance abuse treatment on health care utilization and cost. Research Design. Randomized clinical trial assigning patients to one of two treatment modalities: an Integrated Care model where primary health care is provided along with substance abuse treatment within the unit and an Independent Care model where medical care is provided in the HMO's primary care clinics independently from substance abuse treatment. Subjects. Adult patients entering treatment at the outpatient Chemical Dependency Recovery Program in Kaiser Sacramento. Measures. Medical utilization and cost for 12 months pretreatment and 12 months after treatment entry. Results. For the full, randomized cohort, there were no statistically significant differences between the two treatment groups over time. However, among the subset of patients with substance abuse related medical conditions (SAMC), Integrated Care patients had significant decreases in hospitalization rates (P = 0.04), inpatient days (P = 0.05) and ER use (P = 0.02). Total medical costs per member-month declined from $431.12 to $200.03 (P = 0.02). Among SAMC Independent Care patients, there was a downward trend in inpatient days (P = 0.08) and ER costs (P = 0.05) but no statistically significant decrease in total medical cost. Conclusions. (Non)findings for the full sample suggest that integrating substance abuse treatment with primary care, may not be necessary or appropriate for all patients. However, it may be beneficial to refer patients with substance abuse related medical conditions to a provider also trained in addiction medicine. There appear to be large cost impacts of providing integrated care for such patients.

This study examines the factors related to referrals of adolescents with substance use disorders to substance abuse or mental health treatment by their medical providers. Administrative and chart review data from the membership of a large private health maintenance organization (HMO) were collected from a probability sample of 400 adolescents, ages 13-18, who were diagnosed with a substance use disorder in 1999. Logistic regression analyses examined referral to substance abuse treatment and referral to mental health treatment in the aggregate and stratified by gender. Documented use of both alcohol and another illicit drug, and legal problems increased likelihood of referral to substance abuse and mental health treatment, whereas diagnoses of alcohol and marijuana use disorders decreased likelihood of referral to substance abuse treatment. Mental health diagnoses played a limited role in both types of referrals, although specific psychosocial problems were associated with increased likelihood of referrals. Treatment history and location of first mention of problem were significant predictors of referral. There were no gender differences in referral rates to either substance abuse or mental health treatment; however predictors of referral differed by gender. These findings extend our knowledge about factors that influence clinicians' treatment referrals of adolescents with substance abuse diagnoses and have implications for influencing clinician referral behavior within health plans.

Although many Medicaid beneficiaries receive health care through commercial health maintenance organizations (HMOs), the impact of private managed care on low-income individuals seeking treatment for substance abuse has rarely been studied. This study examined treatment patterns of 234 Medicaid recipients who presented for care at an HMO between 1995 and 1997. After adjustment for demographic factors and duration of health plan membership, the Medicaid patients returned to start treatment after intake less often (odds ratio = 0.60) and dropped out of treatment sooner (median = 14 versus 28 days) than non-Medicaid patients. While many Medicaid patients received significant amounts of substance abuse treatment, further research is needed to explain the observed treatment gap and to identify areas where HMOs can improve services for some of their most vulnerable members.

Background: The Affordable Care Act (ACA) increased insurance coverage for people with HIV (PWH) in the United States, yet post-ACA health care utilization and HIV outcomes have rarely been examined. Methods: Among PWH newly enrolled in an integrated health care system (Kaiser Permanente Northern California) in 2014 (N=880), we examined use of health care and modeled associations between enrollment mechanisms (enrolled in a Qualified Health Plan through the California Exchange vs. other sources), deductibles (none,$1-$ 999 and >= $1000), receipt of benefits from the California AIDS Drug Assistance Program (ADAP), demographic factors, and three-year patterns of health service utilization (primary care, psychiatry, substance treatment, emergency, inpatient) and HIV outcomes (CD4 counts, viral suppression). Results: Health care use was greatest immediately after enrollment and decreased over three years. Those with high deductibles were less likely to use primary care (OR=0.64, 95% CI=0.49 - 0.83, p < 0.001) or psychiatry OR=0.58, 95% CI=0.36, 0.93, p=0.02) than those with low or no deductibles. Enrollment via the Exchange was associated with fewer psychiatry visits (rate ratio [RR]=0.38, 95% CI=0.17 - 0.83; p=0.02), but ADAP was positively associated with number of psychiatry visits (RR=2.22, 95% CI=1.22 – 4.05 p=0.01). There was no association between enrollment mechanism or deductibles and HIV outcomes, but ADAP enrollment was associated with viral suppression (OR=2.23, 95% CI=1.35 - 3.68, p<0.001). Non-white PWH were less likely to be virally suppressed, (OR=0.47, 95% CI= 0.31 - 0.71, p< 0.001). Conclusions: In this sample of PWH drawn from an integrated health care system in California, findings suggest that enrollment via the Exchange and higher deductibles were negatively associated with some aspects of service utilization but did not impact HIV outcomes; support from ADAP appeared to help patients achieve viral suppression; ethnic disparities remain important to address in post-ACA health services for PWH even among those with access to insurance coverage.