Descriptive statistics of the study sample and loss to follow-up.
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a = Divided according to ISCO-88: Legislators, senior officials and managers” in group 1, “Professionals” and “Technicians and associate professionals” in group 2, “Clerks” and “Service workers and shop and market sales workers” in group 3, with the remaining ISCO-88 major groups, consisting of blue collar workers and military personal, in group 4.b = Missing values (n = 146) excluded from loss to follow-up.
创建时间：
2015-12-02
