Table 4.

Bivariate correlations (Pearson's r) between socsiodemographic and clinical variables (N = 110).

Sociodemographic and clinical variables	Total sleep in minutes	Number of awakenings	Wake time in minutes	Wake % of TST	Daytime sleep
	r	r	r	r	r
Age	0.15	0.17	0.04	0.04	0.07
Physical functioning (SF-36–PF)	0.01	−0.15	−0.13	−0.13	−0.14
Time since admission (days)	0.02	0.03	0.04	– 0.02	0.19*
Sleep quality (PSQI global)	−0.19*	0.03	0.25†	0.25†	0.04

*P <  .05, ^†P < .01.