Table 1.

Bivariate associations of variables and descriptive statistics.

Variable	M	SD	1	2	3	4	5	6	7	8	9	10	11	12
(1) Age	70.3	7.6	1
(2) Sex (m = 0, f = 1)	–	–	0.02	1
(3) Work status (w = 1, not w = 0)	–	–	−0.59*	−0.07	1
(4) Past Positive	3.58	0.51	0.09	0.02	−0.04	1
(5) Past Negative	2.25	0.59	0.18*	−0.02	−0.14*	−0.23*	1
(6) Present Hedonistic	2.90	0.44	0.05	0.02	0.03	0.26*	0.16*	1
(7) Present Fatalistic	2.49	0.53	0.30*	0.10*	−0.16*	0.07	0.40*	0.37*	1
(8) Future Positive	3.26	0.42	−0.01	−0.07	−0.06	0.14*	0.17*	−0.03	−0.11*	1
(9) Future Negative	2.51	0.55	−0.11*	0.08	−0.03	−0.05	0.63*	0.17*	0.42*	0.31*	1
(10) PSQ score	0.00	1.00	0.01	0.12*	0.08	−0.01	0.27*	−0.02	0.12*	0.06	0.34*	1
(11) DTS score	0.00	1.00	−0.07	0.00	−0.19*	−0.02	0.29*	0.08	0.10*	0.06	0.32*	0.55*	1

SQ, Sleep Quality; DTS, Daytime Sleepiness, PSQ, Poor Sleep Quality, ^∗p < 0.05.