Table 2.

Spearman's rho correlations of PSQI global and component scores with Actillume measures, sleep diary and CESD

	Actigraphy				Sleep diary				CESD
Group	Sleep efficiency	Total sleep time	Wake-after-sleep onset	Sleep latency	Sleep efficiency	Total sleep time	Wake-after-sleep onset	Sleep latency	Total score
Global score
Combined (n = 112)	0.046	0.130	0.011	0.022	−0.562^**	−0.307^**	0.262^**	0.480^**	0.305^**
Younger (n = 59)	0.018	0.115	−0.006	0.090	−0.220	−0.084	0.034	0.349^**	0.170
Older (n = 53)	−0.122	0.104	0.198	0.074	−0.764^**	−0.548^**	0.561^**	0.557^**	0.364^**
Component 1 – subjective sleep quality
Combined (n = 112)	0.034	0.160	0.002	0.007	−0.432^**	−0.240^*	0.210^*	0.354^**	0.153
Younger (n = 59)	−0.117	0.035	0.094	0.111	−0.091	−0.006	−0.006	0.185	−0.018
Older (n = 53)	−0.038	0.232	0.135	0.019	−0.707^**	−0.581^**	0.542^**	0.511^**	0.281^*
Component 2 – sleep latency
Combined (n = 112)	0.086	0.275^**	−0.005	0.038	−0.378^**	−0.101	0.241^*	0.488^**	0.193^*
Younger (n = 59)	0.034	0.303^*	0.063	0.007	−0.064	0.093	0.070	0.432^**	−0.047
Older (n = 53)	−0.161	0.152	0.252	0.196	−0.644^**	−0.417^**	0.555^**	0.560^**	0.396^**
Component 3 – sleep duration
Combined (n = 112)	−0.126	0.204^*	0.094	0.039	−0.473^**	−0.454^**	0.235^*	0.275^**	0.205^*
Younger (n = 59)	0.009	−0.275^*	−0.101	−0.018	−0.136	−0.331^*	0.049	0.043	0.224
Older (n = 53)	−0.144	−0.087	0.137	0.034	−0.631^**	−0.581^**	0.530^**	0.464^**	0.331^*
Component 4 – habitual sleep efficiency
Combined (n = 112)	−0.103	−0.053	0.106	0.085	−0.563^**	−0.411^**	0.260^**	0.242^*	−0.005
Younger (n = 59)	0.250	0.032	−0.251	−0.021	−0.009	−0.131	−0.114	−0.081	0.045
Older (n = 53)	−0.226	0.024	0.233	0.115	−0.789^**	−0.642^**	0.611^**	0.495^**	0.101
Component 5 – sleep disturbances
Combined (n = 112)	−0.032	−0.051	0.054	0.032	−0.034	−0.070	0.040	0.156	0.120
Younger (n = 59)	−0.071	−0.080	0.038	0.079	−0.155	−0.160	0.071	0.367^**	0.141
Older (n = 53)	−0.017	0.045	0.166	0.020	0.027	0.078	0.012	−0.093	0.148
Component 6 – use of sleeping medication
Combined (n = 112)	0.126	0.090	−0.119	−0.070	−0.199^*	−0.005	0.114	0.146	0.026
Younger (n = 59)	0.143	0.119	−0.079	−0.158	−0.081	−0.032	0.105	0.224	0.057
Older (n = 53)	0.247	0.067	−0.252	−0.106	−0.212	0.040	0.085	0.105	0.032
Component 7 – daytime dysfunction
Combined (n = 112)	0.033	0.044	−0.008	−0.029	−0.307^**	−0.168	0.105	0.206^*	0.317^**
Younger (n = 59)	−0.200	−0.155	0.144	0.065	−0.322^*	−0.097	0.063	0.103	0.187
Older (n = 53)	0.011	0.190	0.045	0.037	−0.430^**	−0.329^*	0.268	0.312^*	0.421^**

P < 0.05;

^**

P < 0.01.