Changes in wake time 1, 2, and 3 years postretirement by age at retirement. Model-based estimates of change in wake time (in min) with 95% confidence intervals associated with transitioning from full-time work to full retirement up to 1, 2, and 3 y posttransition from the model that included an interaction term between retirement and age at retirement. Models were adjusted for sex, self-rated health, and circadian preference.