Table 4: Bivariate correlations (Pearson’s 𝑟 ) between socsiodemographic and clinical variables ( 𝑁 = 1 1 0 ).

Sociodemographic and clinical variablesTotal sleep in minutesNumber of awakeningsWake time in minutesWake % of TSTDaytime 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 < . 0 5 , 𝑃 < . 0 1 .