Table 5 Internal consistency: Cronbach alpha and item-total statistics of the Pittsburgh Sleep Quality Index in the collegiate young adults
From: Dimensionality of the Pittsburgh Sleep Quality Index in the young collegiate adults
Pittsburgh Sleep Quality Index (PSQI) components | Alpha if item deleted |
|---|---|
PSQI component of sleep duration | 0.64 |
PSQI component of sleep disturbances | 0.60 |
PSQI component of sleep latency | 0.57 |
PSQI component of daytime dysfunction | 0.63 |
PSQI component of sleep efficiency | 0.62 |
PSQI component of overall sleep quality | 0.55 |
PSQI component of sleep medication | 0.64 |
Cronbach’s alpha of the PSQI | 0.65 |