Supplemental Digital Content is available in the text. Previous studies on the effect of long working hours on blood pressure have shown inconsistent results. Mixed findings could be attributable to limitations related to blood pressure measurement and the lack of consideration of masked hypertension. The objective was to determine whether individuals who work long hours have a higher prevalence of masked and sustained hypertension. Data were collected at 3-time points over 5 years from 3547 white-collar workers. Long working hours were self-reported, and blood pressure was measured using Spacelabs 90207. Workplace clinic blood pressure was defined as the mean of the first 3readings taken at rest at the workplace. Ambulatory blood pressure was defined as the mean of the next readings recorded every 15 minutes during daytime working hours. Masked hypertension was defined as clinic blood pressure < 140/90 mm Hg and ambulatory blood pressure ≥135/85 mm Hg. Sustained hypertension was defined as clinic blood pressure ≥140/90 mm Hg and ambulatory blood pressure ≥135/85 mm Hg or being treated hypertension. Long working hours were associated with the prevalence of masked hypertension (prevalence ratio 49+=1.70 [95% CI, 1.09–2.64]), after adjustment for sociodemographics, lifestyle-related risk factors, diabetes mellitus, family history of cardiovascular disease, and job strain. The association with sustained hypertension was of a comparable magnitude (prevalence ratio 49+=1.66 [95% CI, 1.15–2.50]). Results suggest that long working hours are an independent risk factor for masked and sustained hypertension. Workplace strategies targeting long working hours could be effective in reducing the clinical and public health burden of hypertension.

中文翻译：

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长时间工作与隐匿性和持续性高血压的流行

补充数字内容在文本中可用。之前关于长时间工作对血压影响的研究显示出不一致的结果。不同的结果可能归因于与血压测量相关的局限性和缺乏对隐匿性高血压的考虑。目的是确定长时间工作的个体是否具有更高的隐匿性和持续性高血压患病率。数据是从 3547 名白领工人 5 年的 3 个时间点收集的。自我报告长时间工作，并使用 Spacelabs 90207 测量血压。工作场所诊所血压定义为工作场所休息时前 3 次读数的平均值。动态血压定义为白天工作时间每 15 分钟记录的下一次读数的平均值。隐匿性高血压定义为临床血压 < 140/90 mm Hg 和动态血压≥135/85 mm Hg。持续性高血压定义为临床血压≥140/90 mm Hg 且动态血压≥135/85 mm Hg 或正在接受治疗的高血压。在调整了社会人口统计学、生活方式相关的危险因素、糖尿病、心血管疾病家族史和其他因素后，长时间工作与隐匿性高血压的患病率有关（患病率 49+=1.70 [95% CI，1.09–2.64]）工作压力。与持续性高血压的关联程度相当（患病率 49+=1.66 [95% CI, 1.15–2.50]）。结果表明，长时间工作是隐匿性和持续性高血压的独立危险因素。