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. 2022 Jun 24;10:919306. doi: 10.3389/fpubh.2022.919306

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Copyright © 2022 Hu, Zheng, Huang, Zhao, Wang, Zhang, Chen, Deng, Qin and Liu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A–C) Restricted cubic splines of the relationship of all all-cause mortality with habitual physical activity, leisure-time physical activity, and commute activity. Potential non-linear relationships were examined using restricted cubic splines (knots on the 50th, 75th, and 95th percentiles), with hazard ratios (HRs) based on cox regression models. HRs with 95% confidence intervals (CIs) were plotted for each unit of the exposure against the median of the first tertile. The dash line represents the HR equal to 1. The HRs was adjusted for age, sex, education, marital status, smoking, alcohol drinking, body mass index, hypertension, diabetes, dyslipidemia, chronic obstructive pulmonary disease, cardiovascular disease, leisure-time physical activity (for commute activity), and commute activity (for leisure-time physical activity).