Fig. 4From: Sleep patterns among shift-working flight controllers of the International Space Station: an observational study on the JAXA Flight Control TeamThe sum of TIB (STIB) and the sum of TST (STST) before, during, and after a consecutive night shift period. The upper and lower panels show the mean ± SD and individual values, respectively. Post hoc comparison was performed on the days when the data from all subjects were obtained. *p < 0.05Back to article page