OBJECTIVE To examine changes in categories of soft drink consumption in a cohort of Mexican adults, three years after the implementation of the sugar sweetened beverage tax. DESIGN Open cohort longitudinal analysis. SETTING Three waves of the Health Workers Cohort Study, Mexico, spanning 2004 to 2018. PARTICIPANTS 1770 people aged 19 years or older with information on drinks consumption available in at least one of the three cohort waves. MAIN OUTCOME MEASURE Change in probability of belonging to one of four categories of soft drinks consumption (non, low, medium, high) after the tax was implemented. Heterogeneity of associations by income and education was also assessed. RESULTS Before the implementation of the tax, more than 50% of the participants were medium and high consumers of soft drinks and less than 10% were in the non-consumer category. After the tax was implemented, 43% of the population was categorised as medium or high consumers and the prevalence of non-consumers increased to 14%. Three years after implementation of the tax on 1 January 2014, the probability of being a non-consumer of soft drinks increased by 4.7 (95% confidence interval 0.3 to 9.1) percentage points and that of being a low consumer increased by 8.3 (0.6 to 16.0) percentage points compared with the pre-tax period. Conversely, the probability of being in the medium and high levels of soft drinks consumption decreased by 6.8 (0.5 to 13.2) percentage points and 6.1 (0.4 to 11.9) percentage points, respectively. No significant heterogeneity of the tax across income levels was observed, but stronger effects of the tax were seen in participants with secondary school education or higher, compared with those with elementary school or less. CONCLUSIONS The Mexican sugar sweetened beverage tax was associated with a reduction in the probability of consuming soft drinks in this cohort of employees from a healthcare provider. The results cannot be extrapolated to the Mexican population, but they suggest that three years after implementation, the tax had helped to increase the proportion of people who do not consume soft drinks while decreasing the proportion of high and medium consumers.

中文翻译：

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墨西哥成年人含糖甜饮料税与软饮料消费之间的关联：《卫生工作者队列研究》开放队列纵向分析。

目的研究在加糖甜饮料税实施三年后，一组墨西哥成年人中软饮料消费类别的变化。设计开放式队列纵向分析。地点2004年至2018年，墨西哥进行了三轮“卫生工作者队列研究”。参与者在至少三个队列中的一轮中，有1770名19岁或19岁以上的人了解了饮料消费信息。主要观察指标实施税后，属于四类软饮料消费量（非，低，中，高）之一的概率发生变化。还评估了收入和教育对协会的异质性。结果在实施税收之前，超过50％的参与者是软饮料的中，高级消费者，不到10％的消费者属于非消费类。实施税收后，43％的人口被归为中级或高级消费者，非消费者的患病率上升至14％。自2014年1月1日起实施该税的三年后，不消费软饮料的可能性增加了4.7个百分点（95％的置信区间0.3到9.1），低消费的可能性增加了8.3（0.6个百分点）税前期间为16.0个百分点。相反，处于中度和高水平软饮料消费量的可能性分别降低了6.8（0.5至13.2）个百分点和6.1（0.4至11.9）个百分点。没有观察到税收在收入水平上存在明显的异质性，但是与初等教育程度或以下的相比，受过中学或更高学历的参与者的税收影响更大。结论墨西哥含糖甜饮料税与该医疗保健提供者的这一类员工饮用软饮料的可能性降低有关。结果不能外推到墨西哥人口，但他们建议实施该税法三年后，该税有助于增加不喝软饮料的人口比例，同时减少高中级消费者的比例。结论墨西哥含糖甜饮料税与该医疗保健提供者的这一类员工饮用软饮料的可能性降低有关。结果不能外推到墨西哥人口，但他们建议实施该税法三年后，该税有助于增加不喝软饮料的人口比例，同时减少高中级消费者的比例。结论墨西哥含糖甜饮料税与该人群中从保健提供者处购买软饮料的可能性降低有关。结果不能外推到墨西哥人口，但他们建议实施该税法三年后，该税有助于增加不喝软饮料的人口比例，同时减少高中级消费者的比例。