Chinese version of narcolepsy severity scale: a validation study

BMC Neurology

Table 1 Item-total score correlations and Cronbach’s Alpha of NSS ^a

Dimensions and items	Item-total score correlation
Dimensions and items	Spearman correlation coefficient	significance
Item 1	0.361	p < 0.001
Item 2	0.440	p < 0.001
Item 3	0.630	p < 0.001
Item 4	0.532	p < 0.001
Item 5	0.242	p = 0.007
Item 6	0.400	p < 0.001
Item 7	0.342	p < 0.001
Item 8	0.603	p < 0.001
Item 9	0.655	p < 0.001
Item 10	0.616	p < 0.001
Item 11	0.611	p < 0.001
Item 12	0.677	p < 0.001
Item 13	0.542	p < 0.001
Item 14	0.632	p < 0.001
Item 15	0.455	p < 0.001
Cronbach’s α of the NSS	0.799
Alfa Cronbach global split-half coeficients	0.657	0.774

ISSN: 1471-2377