Table 3.

Standardized factor loadings for different models.

	One factor	Two-factor	Three- factor	One factor#	Two-factor#	Three-factor #
Subjective sleep quality	0.81	0.83	0.89	0.82	0.83	0.89
Sleep latency	0.42	0.42	0.40	0.45	0.41	0.40
Sleep duration	0.23	0.49	0.50	0.24	0.52	0.50
Habitual sleep efficiency	0.24	0.49	0.48	0.26	0.47	0.48
Sleep disturbances	0.36	0.36	0.39	0.36	0.35	0.39
Daytime dysfunction	0.60	0.60	0.69	0.60	0.60	0.69
Use of sleep medications	0.07	0.07	0.07	–	–	–