Fig. 1
Mental component summary stratified into 4 groups by insomnia severity and total sleep time. * vs. ISI < 8 & TST ≥ 6 h group, P < 0.001. ** vs. ISI < 8 & TST < 6 h group, P < 0.001. ISI: Insomnia severity index, TST: total sleep time
Fig. 1 | Health and Quality of Life Outcomes