Study | Sample | N | N of factors | Dimensions labels |
---|---|---|---|---|
Cole et al. [6] | USA community-dwelling depressed and nondepressed adults > 60 years | 417 | Three-factor | Sleep Efficiency (sleep duration, habitual sleep efficiency) |
Perceived Sleep Quality (subjective sleep quality, sleep latency, use of sleep medication) | ||||
Daily Disturbances (sleep disturbances, daytime dysfunction) | ||||
Aloba et al. [7] | Nigerian university students | 520 | Three-factor | First factor (subjective sleep quality, sleep latency, habitual sleep efficiency, sleep disturbances, use of sleep medication) |
Second factor (sleep duration and sleep disturbances) | ||||
Third factor (subjective sleep quality, habitual sleep efficiency, use of sleep medication) | ||||
Magee et al. [8] | Australian adults aged 18 to 59 years | 364 | Two- and three-factor | Same factors as Cole et al. for the three- and without Daily Disturbances for the two-factor model |
Burkhalter et al. [9] | Swiss renal transplant recipients | 135 | Three-factor | Same factors as Cole et al. [6] |
Mariman et al. [10] | Belgian chronic fatigue syndrome patients | 413 | Three-factor | Same factors as Cole et al. [6] |