Table 3.

Comparison of Pittsburgh Sleep Quality Index scores between individuals with impaired fasting glucose and controls (x̄ ±SD)

Items	IFG		F value	p Value
	No	Yes
Subjective sleep quality	0.415±0.013	0.463±0.03	31.823	0.000
Sleep latency	0.742±0.004	0.800±0.016	27.446	0.000
Sleep duration	0.152±0.002	0.159±0.001	0.503	0.478
Sleep efficiency	0.444±0.003	0.321±0.001	29.452	0.000
Sleep disturbance	0.591±0.003	0.658±0.012	28.259	0.000
Use of hypnotic	0.051±0.002	0.065±0.007	16.651	0.000
Daytime dysfunction	0.147±0.011	0.170±0.002	9.725	0.000
Global PSQI scores	2.302±0.009	2.495±0.041	20.957	0.000

Using analysis of covariance, covariates for age=47.6 years old.

IFG, impaired fasting glucose; PSQI, Pittsburgh Sleep Quality Index.