TABLE 1.

Interitem correlation matrix – activity interference items

	Work	Household chores	Shopping	Social activities	Recreational activities	Sexual relations	Physical exercise	Sleep	Mental efficiency
Work	1	0.660	0.598	0.484	0.057	0.031	0.611	0.502	0.304
Household chores	0.660	1	0.731	0.568	0.023	−0.036	0.608	0.569	0.460
Shopping	0.598	0.731	1	0.525	0.033	−0.023	0.557	0.540	0.421
Social activities	0.484	0.568	0.525	1	0.045	−0.055	0.393	0.418	0.376
Recreational activities	0.057	0.023	0.033	0.045	1	0.505	0.008	0.021	−0.112
Sexual relations	0.031	−0.036	−0.023	−0.055	0.505	1	−0.024	−0.036	−0.135
Physical exercise	0.611	0.608	0.557	0.393	0.008	−0.024	1	0.488	0.347
Sleep	0.502	0.569	0.540	0.418	0.021	−0.036	0.488	1	0.469
Mental efficiency	0.304	0.460	0.421	0.376	−0.112	−0.135	0.347	0.469	1