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Background. Cannabis use is common in North America, especially among young people, and is associated with a risk of various acute and chronic adverse health outcomes. Cannabis control regimes are evolving, for example toward a national legalization policy in Canada, with the aim to improve public health, and thus require evidence-based interventions. As cannabis-related health outcomes may be influenced by behaviors that are modifiable by the user, evidence-based Lower-Risk Cannabis Use Guidelines (LRCUG)—akin to similar guidelines in other health fields—offer a valuable, targeted prevention tool to improve public health outcomes. Objectives. To systematically review, update, and quality-grade evidence on behavioral factors determining adverse health outcomes from cannabis that may be modifiable by the user, and translate this evidence into revised LRCUG as a public health intervention tool based on an expert consensus process. Search methods. We used pertinent medical search terms and structured search strategies, to search MEDLINE, EMBASE, PsycINFO, Cochrane Library databases, and reference lists primarily for systematic reviews and meta-analyses, and additional evidence on modifiable risk factors for adverse health outcomes from cannabis use. Selection criteria. We included studies if they focused on potentially modifiable behavior-based factors for risks or harms for health from cannabis use, and excluded studies if cannabis use was assessed for therapeutic purposes. Data collection and analysis. We screened the titles and abstracts of all studies identified by the search strategy and assessed the full texts of all potentially eligible studies for inclusion; 2 of the authors independently extracted the data of all studies included in this review. We created Preferred Reporting Items for Systematic Reviews and Meta-Analyses flow-charts for each of the topical searches. Subsequently, we summarized the evidence by behavioral factor topic, quality-graded it by following standard (Grading of Recommendations Assessment, Development, and Evaluation; GRADE) criteria, and translated it into the LRCUG recommendations by the author expert collective on the basis of an iterative consensus process. Main results. For most recommendations, there was at least “substantial” (i.e., good-quality) evidence. We developed 10 major recommendations for lower-risk use: (1) the most effective way to avoid cannabis use–related health risks is abstinence, (2) avoid early age initiation of cannabis use (i.e., definitively before the age of 16 years), (3) choose low-potency tetrahydrocannabinol (THC) or balanced THC-to-cannabidiol (CBD)–ratio cannabis products, (4) abstain from using synthetic cannabinoids, (5) avoid combusted cannabis inhalation and give preference to nonsmoking use methods, (6) avoid deep or other risky inhalation practices, (7) avoid high-frequency (e.g., daily or near-daily) cannabis use, (8) abstain from cannabis-impaired driving, (9) populations at higher risk for cannabis use–related health problems should avoid use altogether, and (10) avoid combining previously mentioned risk behaviors (e.g., early initiation and high-frequency use). Authors’ conclusions. Evidence indicates that a substantial extent of the risk of adverse health outcomes from cannabis use may be reduced by informed behavioral choices among users. The evidence-based LRCUG serve as a population-level education and intervention tool to inform such user choices toward improved public health outcomes. However, the LRCUG ought to be systematically communicated and supported by key regulation measures (e.g., cannabis product labeling, content regulation) to be effective. All of these measures are concretely possible under emerging legalization regimes, and should be actively implemented by regulatory authorities. The population-level impact of the LRCUG toward reducing cannabis use–related health risks should be evaluated. Public health implications. Cannabis control regimes are evolving, including legalization in North America, with uncertain impacts on public health. Evidence-based LRCUG offer a potentially valuable population-level tool to reduce the risk of adverse health outcomes from cannabis use among (especially young) users in legalization contexts, and hence to contribute to improved public health outcomes.

Objectives. To document how health insurance coverage changed for White, Black, and Hispanic adults after the Affordable Care Act (ACA) went into effect. Methods. We used data from the American Community Survey from 2008 to 2014 to examine changes in the percentage of nonelderly adults who were uninsured, covered by Medicaid, or covered by private health insurance. In addition to presenting overall trends by race/ethnicity, we stratified the analysis by income group and state Medicaid expansion status. Results. In 2013, 40.5% of Hispanics and 25.8% of Blacks were uninsured, compared with 14.8% of Whites. We found a larger gap in private insurance, which was partially offset by higher rates of public coverage among Blacks and Hispanics. After the main ACA provisions went into effect in 2014, coverage disparities declined slightly as the percentage of adults who were uninsured decreased by 7.1 percentage points for Hispanics, 5.1 percentage points for Blacks, and 3 percentage points for Whites. Coverage gains were greater in states that expanded Medicaid programs. Conclusions. The ACA has reduced racial/ethnic disparities in coverage, although substantial disparities remain. Further increases in coverage will require Medicaid expansion by more states and improved program take-up in states that have already done so.

Objectives. To determine whether the 2014 Medicaid expansions facilitated by the Affordable Care Act affected overall and early-stage cancer diagnosis for nonelderly adults. Methods. We used Surveillance, Epidemiology, and End Results Cancer Registry data from 2010 through 2014 to estimate a difference-in-differences model of cancer diagnosis rates, both overall and by stage, comparing changes in county-level diagnosis rates in US states that expanded Medicaid in 2014 with those that did not expand Medicaid. Results. Among the 611 counties in this study, Medicaid expansion was associated with an increase in overall cancer diagnoses of 13.8 per 100 000 population (95% confidence interval [CI] = 0.7, 26.9), or 3.4%. Medicaid expansion was also associated with an increase in early-stage diagnoses of 15.4 per 100 000 population (95% CI = 5.4, 25.3), or 6.4%. There was no detectable impact on late-stage diagnoses. Conclusions. In their first year, the 2014 Medicaid expansions were associated with an increase in cancer diagnosis, particularly at the early stage, in the working-age population. Public Health Implications. Expanding public health insurance may be an avenue for improving cancer detection, which is associated with improved patient outcomes, including reduced mortality.

Objectives. To examine how much sugar-sweetened beverage (SSB) excise taxes increased SSB retail prices in Oakland and San Francisco, California. Methods. We collected pretax (April–May 2017) and posttax (April–May 2018) retail prices of SSBs and non-SSBs from 155 stores in Oakland, San Francisco, and comparison cities. We analyzed data using difference-in-differences high-dimensional fixed-effects regressions, weighted by regional beverage sales. Results. Across all beverage sizes, the weighted average price of SSBs increased by 0.92 cents per ounce (95% confidence interval [CI] = 0.28, 1.56) in Oakland and 1.00 cents per ounce (95% CI = 0.35, 1.65) in San Francisco, compared with prices in untaxed cities. The tax did not significantly alter prices of water, 100% juice, or milk of any size examined. Diet soda only, among non-SSBs, exhibited a higher price increase for some sizes in taxed cities. Conclusions. Within 4 to 10 months of implementation, Oakland’s and San Francisco’s SSB excise taxes significantly increased SSB retail prices by approximately the amount of the taxes, a key mechanism for reducing consumption.

Objectives. To assess the impact of the expansion of Medicaid eligibility in the United States on the opioid epidemic, as measured through increased access to opioid analgesic medications and medication-assisted treatment. Methods. Using Medicaid enrollment and reimbursement data from 2011 to 2016 in all states, we evaluated prescribing patterns of opioids and the 3 Food and Drug Administration–approved medications used in treating opioid use disorders by using 2 statistical models. We used difference-in-differences and interrupted time series models to measure prescribing rates before and after state expansions. Results. Although opioid prescribing per Medicaid enrollee increased overall, we observed no statistical difference between expansion and nonexpansion states. By contrast, per-enrollee rates of buprenorphine and naltrexone prescribing increased more than 200% after states expanded eligibility, while increasing by less than 50% in states that did not expand. Methadone prescribing decreased in all states in this period, with larger decreases in expansion states. Conclusions. The Medicaid expansion enrolled a population no more likely to be prescribed opioids than the base Medicaid population while significantly increasing uptake of 2 drugs used in medication-assisted treatment.

We examined trends in US public health expenditures by analyzing historical and projected National Health Expenditure Accounts data. Per-capita public health spending (inflation-adjusted) rose from$39 in 1960 to $ 281 in 2008, and has fallen by 9.3% since then. Public health’s share of total health expenditures rose from 1.36% in 1960 to 3.18% in 2002, then fell to 2.65% in 2014; it is projected to fall to 2.40% in 2023. Public health spending has declined, potentially undermining prevention and weakening responses to health inequalities and new health threats.

Objectives. To evaluate the effect of the Affordable Care Act (ACA) Medicaid expansions on national rates of home eviction and eviction initiation in the United States. Methods. Using nationally representative administrative data from The Eviction Lab at Princeton University, we estimated the effects of the ACA Medicaid expansions on county-level evictions and filings from 2000 to 2016 with a difference-in-difference regression design. Results. We found that Medicaid expansions were associated with an annual reduction in the rate of evictions by 1.15 per 1000 renter-occupied households (P < .001), a reduction of 1.59 eviction filings per 1000 renter-occupied households (P < .001), and a reduction in the average number of evictions by 46 (P < .05). We found additional evidence that increasing rates of African American residents in a county was associated with a greater rate of evictions filed, and increased rates of poverty and rent burdens relative to income were associated with more evictions both filed and completed. Conclusions. Evictions decreased after Medicaid expansion, demonstrating further evidence of the substantive financial protections afforded by this coverage. The reduction in the eviction filing rate suggests that Medicaid expansion could be reducing evictions by preventing the court proceeding entirely.

Objectives. To describe the public health and policy lessons learned from the failure of the Cook County, Illinois, Sweetened Beverage Tax (SBT). Methods. This retrospective, mixed-methods, qualitative study involved key informant (KI) and discussion group interviews and document analysis including news media, court documents, testimony, letters, and press releases. Two coders used Atlas.ti v.8A to analyze 321 documents (from September 2016 through December 2017) and 6 KI and discussion group transcripts (from December 2017 through August 2018). Results. Key lessons were (1) the SBT process needed to be treated as a political campaign, (2) there was inconsistent messaging regarding the tax purpose (i.e., revenue vs public health), (3) it was important to understand the local context and constraints, (4) there was implementation confusion, and (5) the media influenced an antitax backlash. Conclusions. The experience with the implementation and repeal of the Cook County SBT provides important lessons for future beverage tax efforts. Public Health Implications. Beverage taxation efforts need to be treated as political campaigns requiring strong coalitions, clear messaging, substantial resources, and work within the local context.

State and local governments traditionally protect the health and safety of their populations more strenuously than does the federal government. Preemption, when a higher level of government restricts or withdraws the authority of a lower level of government to act on a particular issue, was historically used as a point of negotiation in the legislative process. More recently, however, 3 new preemption-related issues have emerged that have direct implications for public health. First, multiple industries are working on a 50-state strategy to enact state laws preempting local regulation. Second, legislators supporting preemptive state legislation often do not support adopting meaningful state health protections and enact preemptive legislation to weaken protections or halt progress. Third, states have begun adopting enhanced punishments for localities and individual local officials for acting outside the confines of preemption. These actions have direct implications for health and cover such topics as increased minimum wages, paid family and sick leave, firearm safety, and nutrition policies. Stakeholders across public health fields and disciplines should join together in advocacy, action, research, and education to support and maintain local public health infrastructures and protections.

Objectives. To estimate if Washington State’s paid sick leave law increased access to paid sick leave, reduced employees’ working while sick, and relieved care burdens. Methods. I drew on new data from 12 772 service workers collected before and after the law took effect in January 2018 in Washington State and over the same time period in comparison states that did not have paid sick leave requirements. I used difference-in-difference models to estimate the effects of the law. Results. The law expanded workers’ access to paid sick leave by 28 percentage points (P < .001). The law reduced the share of workers who reported working while sick by 8 percentage points (P < .05). Finally, there was little evidence that the law served to reduce work–life conflict for Washington workers. Conclusions. Mandated paid sick leave increased access to paid sick leave benefits and led to reductions in employees’ working while sick. However, covered workers did not experience reductions in work–life conflict in the period immediately following passage.