Table 1.

The matrix reports the network weights, which corresponds to regularized partial correlations.

Variable	Sleep_F1	Sleep_F2	Sleep_F3	PSS	BPQ	BAI	CD	NSW	Covid B	Covid F	Covid Death	Covid Tot	Gender	CPG
Sleep_F1	0.813	0.287	0.087	0.01	−0.038	0	0.079	0.154	−0.061	−0.031	0	−0.011	−0.009	0.043
Sleep_F2	0.287	0.913	0.183	0.05	0.09	0.14	0	−0.041	0.037	−0.024	1.655e−4	0	−0.009	0.048
Sleep_F3	0.087	0.183	1.174	0.19	0.085	0.147	0.11	−0.025	0.126	0.007	0	−0.009	0.009	0.2
PSS	0.013	0.052	0.186	1.16	0.071	0.446	0.025	0.052	0.048	0.017	0	−0.01	0.146	0.095
BPQ	−0.038	0.09	0.085	0.07	0.911	0.31	−0.095	0.018	0.041	0.01	0.003	3.443e−4	0.045	0.106
BAI	0	0.14	0.147	0.45	0.31	1.345	−0.023	−0.082	0.01	0	0.003	0	0.152	0.032
CD	0.079	0	0.11	0.03	−0.095	−0.02	0.675	0.077	−0.03	0.065	0	−0.005	−0.054	0.112
NSW	0.154	−0.041	−0.025	0.05	0.018	−0.08	0.077	0.821	0.142	0.102	−0.027	0	−0.099	−0.002
Covid B	−0.061	0.037	0.126	0.05	0.041	0.01	−0.03	0.142	0.835	0.162	0.017	0.023	−0.136	0.002
Covid F	−0.031	−0.024	0.007	0.02	0.01	0	0.065	0.102	0.162	0.57	0	0.065	0.058	0.028
Covid D	0	1.655e−4	0	0	0.003	0.003	0	−0.027	0.017	0	1.035	0.97	0.014	0
Covid Tot	−0.011	0	−0.009	−0.01	3.443e−4	0	−0.005	0	0.023	0.065	0.97	1.097	0	−0.004
Gender	−0.009	−0.009	0.009	0.15	0.045	0.152	−0.054	−0.099	−0.136	0.058	0.014	0	0.794	0.064
CPG	0.043	0.048	0.2	0.1	0.106	0.032	0.112	−0.002	0.002	0.028	0	−0.004	0.064	0.736

The diagonal reports the Strength centrality index, which is the sum of all the weights that a node receives. Strength also measures the predictability of a node given the others.