Marital status is obtained using the marriage year in each year between 1998 and 2015. Using the birth year of each child, we also gain whether the return migrants had children in each age cohort. Table 1 shows the description of independent variables. The description of individual and ...
Sleep Diaries The subjective assessment of night's sleep was obtained by sleep diaries (see [35]). The following variables were extracted: • Sleep onset latency (SOL): the time (in minutes) it takes to fall asleep after turning off the light; • Number of nocturnal awakenings (NOA);...