Results of a Prospective Study of Acute Coronary Syndrome Hospitalization After Enactment of a Smoking Ban in Public Places in Hyogo Prefecture - Comparison With Gifu, a Prefecture Without a Public Smoking Ban

Long-Term Follow-up Study of Hospitalizations for Acute Coronary Syndrome in Kobe-City and Other Districts Under the Hyogo Smoking Ban Legislation - A Nationwide Database Study

BACKGROUND

Hyogo Prefecture has managed smoking ban legislation with partial restrictions in public places (Hyogo-L) since 2013. Previous studies have reported a significant decrease in admissions for acute coronary syndrome (ACS) in Kobe-city, but not in other districts of Hyogo Prefecture in the 2 years after Hyogo-L. The aim of the present study was to define the long-term effect of Hyogo-L.

METHODS AND RESULTS

The JROAD-DPC dataset was used to collect information on the number of hospitalizations for ACS in Hyogo Prefecture, and in Osaka-city without smoking ban legislation, from April 2013 to March 2020. Poisson regression analysis was performed to calculate incident rate ratios (IRRs) and 95% confidence intervals (CIs). ACS records of 3,101 in Kobe-city, 11,375 in areas of Hyogo Prefecture other than Kobe-city and 11,079 in Osaka-city were collected for admissions. The incidence of ACS reduced significantly over time in Kobe-city [IRR (95% CI); 0.96 (0.94-0.97)], but did not reduce in the others. The decrease in Kobe-city was observed in ACS patients without smoking, hypertension, and hyperlipidemia, but not in those with such risk factors.

CONCLUSIONS

The long-term ACS reduction or non-reduction under Hyogo-L was determined at the initial period and the same scenario continued, supporting the importance of legislation and compliance with the smoking ban. The lowering effect was remarkable in ACS patients without risk factors such as non-smoking.

The limits of single-group interrupted time series analysis in assessing the impact of smoke-free laws on short-term mortality

BACKGROUND

Decreases in circulatory/respiratory morbimortality after the January-2006 Spanish partial smoke-free law have been found using designs without control groups, such as single-group interrupted time series (ITS), which are prone to biases. The aim was to reassess the law's impact on mortality using ITS designs with robustness checks.

METHODS

A comprehensive cohort of people aged ≥25 in each calendar-year of 2002-2007, living in 13 of 18 Spanish regions, was followed up between 01/2002 and 12/2007. The law included a smoking ban in indoor public and workplaces, allowing exceptions in catering, hospitality and leisure venues, and other interventions. Post-law changes in monthly coronary/respiratory mortality were estimated using segmented regression, adjusting for relevant covariates, including seasonality, extreme temperatures, influenza incidence and air pollution. The validity of results was assessed using control outcomes, hypothetical law dates, and non-equivalent control groups, analysing their results as difference-in-differences (DID) designs.

RESULTS

Significant immediate post-law decreases in coronary, respiratory and non-tobacco-related mortality were observed among people aged ≥70. A significant immediate post-law decrease in respiratory mortality (-12.7%) was also observed among people age 25-69, although this was neutralized by a subsequent upward trend before 1.5 years. More favourable post-law changes in coronary/respiratory mortality among the target (people aged 25-69) than control groups (people aged ≥70 or women aged ≥80) were not identified in DID designs. Establishing hypothetical law dates, immediate decreases began in February/March 2005 with maxima between April and July 2005.

CONCLUSIONS

After robustness checks, the results do not support a clear positive impact of the 2006 Spanish smoke-free law on short-term coronary/respiratory mortality. The favourable immediate changes observed pre- and post-law could derive mainly from the harvesting effect of the January-2005 cold wave. This highlights the risks of assessing the impact of health interventions using both morbimortality outcomes and designs without a control group and adequate robustness checks.

Partial Smoking Ban and Secondhand Smoke Exposure in Japan

Implementing smoking bans is a worldwide common practice for tobacco control. However, if the policy prohibits smoking partially rather than comprehensively, it may increase nonsmokers’ exposure to secondhand smoke (SHS) in nonprohibited places. This paper investigates how a partial smoking ban affected nonsmokers’ SHS exposure (measured by frequency of having exposure to SHS in days per month) in households, workplaces, and restaurants by examining the case of a partial smoking ban introduced in a large Japanese prefecture in 2013. Using data from the National Health and Nutrition Survey (NHNS) in 2010, 2013, and 2016 (n = 30,244) and the Comprehensive Survey of Living Conditions (CSLC) from 2001 to 2016 (n = 2,366,896), this paper employs a difference-in-differences (DID) approach. We found that the partial smoking ban significantly increased their SHS exposure in households and workplaces by 2.64 days and 4.70 days per month, respectively, while it did not change nonsmokers’ SHS exposure in restaurants. The results imply that the smoking ban displaced smokers from public places to private places. We also found that neither smokers’ smoking status nor smoking intensity changed significantly after implementing the partial smoking ban. Comprehensive smoking bans are needed to better protect nonsmokers from SHS exposure.

Survey on the Status of Smoking Inside Eating Establishments in the Cities of Kobe and Amagasaki

BACKGROUND

The Hyogo Prefectural Government has been enforcing a smoking ban ordinance since April 2013. The present survey was conducted to determine the extent to which the smoking ban has been successfully implemented in eating establishments in Kobe City and Amagasaki City.Methods and Results:The Health and Welfare Department of the Hyogo Prefectural Government provided a list of eating establishments in Kobe and Amagasaki City. From these, we chose 1,300 from each city using random number generation. Responses were obtained from 310 establishments in Kobe City (response rate: 23.8%) and 297 in Amagasaki City (22.8%). Overall, 58.1% of the establishments surveyed in Kobe City were aware of the ordinance, a recognition rate significantly higher than that of Amagasaki City, where only 45.5% of eateries were aware of the ordinance (P=0.003). Of the Kobe City eateries, 31.7% had succeeded in implementing a complete ban on smoking. In Amagasaki City, the rate was significantly lower, at just 13.4% (P<0.001). A logistic regression analysis showed that coffee shops, Japanese-style taverns, bars, and eating establishments that served alcohol were the independent significant predictors of low compliance. Kobe City restaurants, women, and families were the independent significant predictors of high compliance with the complete smoking ban.

CONCLUSIONS

The rates of recognition and implementation of the complete smoking ban were significantly lower in Amagasaki City than in Kobe City. There needs to be a strong and continuous socialization campaign to promote the ordinance.

Acute coronary syndromes occurring while driving: frequency and patient characteristics

Background

Acute coronary syndrome (ACS) may occur during any human activity, including driving. The objectives of this study were to report the frequency of ACS occurring while driving, clarify patient characteristics, and analyze the behavioral patterns of drivers who sustained ACS.

Methods

A single-center, retrospective observational study was conducted using prospectively acquired data. Among 1605 ACS patients admitted between January 2011 and December 2016, 65 (60 men/5 women) patients who sustained ACS while driving were identified. Clinical variables were compared between these 65 patients and 1540 patients who sustained ACS while performing other activities. Furthermore, multivariable regression analysis was performed to identify variables associated with ACS.

Results

The frequency of ACS occurring while driving was 4.0% (65/1605). Compared with patients who sustained ACS while performing other activities, those who sustained ACS while driving were significantly younger (66.2 ± 13.0 vs. 57.5 ± 12.2 years, p < 0.001) and more likely to smoke (34.2 vs. 60.0%, p < 0.001). Multivariable regression analysis showed that age (OR 0.961; 95% CI 0.940–0.982) and current smoking (OR 1.978; 95% CI 1.145–3.417) were associated with ACS. While 55 drivers (85%) who remained conscious after ACS could seek medical attention without causing accidents, the other 10 (15%) who sustained cardiac arrest caused accidents.

Conclusions

The association between current smoking and ACS occurring while driving suggests that smoking cessation is advised for smokers who drive from the standpoint of driving safety. We expect that prospective studies be conducted to verify our findings and identify individuals at risk for ACS while driving.

Electronic supplementary material

The online version of this article (10.1186/s12199-017-0689-5) contains supplementary material, which is available to authorized users.