Research Article
Shortening of the Pittsburgh Sleep Quality Index Survey Using Factor Analysis
Table 3
Specificity and sensitivity of different cut-off values for “good” and “poor” sleeper scored by original and “shortPSQI.”
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“shortPSQI” cumulative score greater than this cut-off indicates “poor” sleeper. the proportion of “poor” sleepers determined by “shortPSQI” out of original survey “poor” sleepers. the proportion of “good” sleepers determined by “shortPSQI” out of original survey “good” sleepers. | |||||||||||||||||||||||||||||||||