TY - JOUR
T1 - Validity of the Italian Version of the Pittsburgh Sleep Quality Index (PSQI)
AU - Curcio, Giuseppe
AU - Tempesta, Daniela
AU - Scarlata, Simone
AU - Marzano, Cristina
AU - Moroni, Fabio
AU - Rossini, Paolo Maria
AU - Ferrara, Michele
AU - De Gennaro, Luigi
PY - 2013/4
Y1 - 2013/4
N2 - The aim of this study is to validate the Italian version of the Pittsburgh Sleep Quality Index (PSQI), comparing five different groups of individuals (healthy young and elderly, sleep apnoea syndrome patients, depressed patients, individuals with dementia) by both questionnaire scores and polysomnographic measures. Fifty individuals (10 for each group) participated in the study. Each of them filled in the PSQI and slept for two consecutive nights in the sleep laboratory. The PSQI showed an overall reliability coefficient (Cronbach's α) of 0.835, indicating a high degree of internal consistency. The mean PSQI global score showed significant differences between groups, with an impaired overall quality of sleep in patients' groups with respect to both the healthy groups. Results also indicated that the best cut-off score (differentiating good from bad sleepers) is 5. Pittsburgh Sleep Quality Index is a useful, valid and reliable tool for the assessment of sleep quality, with an overall efficiency comparable to the mother language version and differentiate good from bad sleepers. The Italian version of the questionnaire provides a good and reliable differentiation between normal and pathological groups, with higher scores reported by people characterized by impaired objectively evaluated sleep quality.
AB - The aim of this study is to validate the Italian version of the Pittsburgh Sleep Quality Index (PSQI), comparing five different groups of individuals (healthy young and elderly, sleep apnoea syndrome patients, depressed patients, individuals with dementia) by both questionnaire scores and polysomnographic measures. Fifty individuals (10 for each group) participated in the study. Each of them filled in the PSQI and slept for two consecutive nights in the sleep laboratory. The PSQI showed an overall reliability coefficient (Cronbach's α) of 0.835, indicating a high degree of internal consistency. The mean PSQI global score showed significant differences between groups, with an impaired overall quality of sleep in patients' groups with respect to both the healthy groups. Results also indicated that the best cut-off score (differentiating good from bad sleepers) is 5. Pittsburgh Sleep Quality Index is a useful, valid and reliable tool for the assessment of sleep quality, with an overall efficiency comparable to the mother language version and differentiate good from bad sleepers. The Italian version of the questionnaire provides a good and reliable differentiation between normal and pathological groups, with higher scores reported by people characterized by impaired objectively evaluated sleep quality.
KW - Dementia
KW - Depression
KW - OSAS
KW - Sleep complaints
KW - Sleep quality
KW - Validation studies
UR - http://www.scopus.com/inward/record.url?scp=84879684984&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879684984&partnerID=8YFLogxK
U2 - 10.1007/s10072-012-1085-y
DO - 10.1007/s10072-012-1085-y
M3 - Article
C2 - 22526760
AN - SCOPUS:84879684984
VL - 34
SP - 511
EP - 519
JO - Neurological Sciences
JF - Neurological Sciences
SN - 1590-1874
IS - 4
ER -