TABLE 2.

Correlations between sleep quality analysis parameters and percentage differences (D) pre-post shift cycle in maximum voluntary contraction (MVC) force of the finger flexor muscles, surface electromyography (sEMG) root mean square (RMS), and mean frequency (MF).

		Pre-post D MVC force	Pre-post D sEMG RMS	Pre-post D sEMG MF
Time in bed	R, p	−0.322, 0.007*	−0.464, < 0.001*	−0.386, 0.001*
Assumed sleep time	R, p	−0.334, 0.005*	−0.356, 0.003*	−0.226, 0.06
Actual sleep time	R, p	−0.362, 0.002*	−0.363, 0.002*	−0.232, 0.05
Sleep efficiency	R, p	−0.332, 0.005*	−0.392, 0.001*	−0.331, 0.005*
Sleep latency	R, p	0.372, 0.002*	0.340, 0.005*	0.222, 0.07
Movement and fragmentation index	R, p	0.162, 0.18	0.231, 0.05	0.251, 0.04*

Correlations include all participants (n = 71). Cells report Pearson correlation coefficient (R) and significance level (p). ^∗p < 0.05.