Table 3: T-value, Pearson correlation coefficient, factor loadings, ICC and Cronbach Alpha of the Sleep-50 (N = 421).
|
Factor |
No |
tvaluea |
(λ)b |
Rc |
Cronbach Alpha |
|
Factor 5 |
Q1 |
12.1 |
0.56*** |
0.388** |
0.878 |
|
|
Q2 |
13.77 |
0.63*** |
0.607** |
|
|
Sleep apnea |
Q3 |
21.79 |
0.87*** |
0.531** |
|
|
|
Q4 |
14.17 |
0.64*** |
0.497** |
|
|
|
Q5 |
15.69 |
0.69*** |
0.570** |
|
|
|
Q6 |
20.57 |
0.84*** |
0.495** |
|
|
|
Q7 |
15.11 |
0.67*** |
0.498** |
|
|
|
Q8 |
15.5 |
0.69*** |
0.569** |
|
|
Factor 3 |
Q9 |
21.72 |
0.86*** |
0.569** |
0.893 |
|
|
Q10 |
21.87 |
0.87*** |
0.618** |
|
|
Insomnia |
Q11 |
18.39 |
0.77*** |
0.599** |
|
|
|
Q12 |
18.51 |
0.78*** |
0.587** |
|
|
|
Q13 |
10.42 |
0.49*** |
0.321** |
|
|
|
Q14 |
13.24 |
0.60*** |
0.376** |
|
|
|
Q15 |
12.44 |
0.57*** |
0.360** |
|
|
|
Q16 |
16.73 |
0.72*** |
0.468** |
|
|
Factor 6 |
Q17 |
11.46 |
0.55*** |
0.444** |
0.834 |
|
|
Q18 |
16.57 |
0.73*** |
0.509** |
|
|
Narcolepsy |
Q19 |
17.51 |
0.76*** |
0.549** |
|
|
|
Q20 |
16.82 |
0.74*** |
0.585** |
|
|
|
Q21 |
18.55 |
0.79*** |
0.572** |
|
|
Factor 9 |
Q22 |
12.09 |
0.58*** |
0.419** |
0.784 |
|
|
Q23 |
14.92 |
0.68*** |
0.584** |
|
|
RLS/PLMD |
Q24 |
19.84 |
0.84*** |
0.613** |
|
|
|
Q25 |
15.35 |
0.70*** |
0.536** |
|
|
Factor1 |
Q26 |
17.68 |
0.78*** |
0.560** |
0.767 |
|
|
Q27 |
20.11 |
0.86*** |
0.627** |
|
|
CRSD |
Q28 |
11.22 |
0.54*** |
0.393** |
|
|
Factor 8 |
Q29 |
15.81 |
0.72*** |
0.472** |
0.735 |
|
Sleep walking |
Q30 |
14.48 |
0.68*** |
0.376** |
|
|
|
Q31 |
17.48 |
0.78*** |
0.598** |
|
|
Factor 4 |
Q32 |
22.87 |
0.89*** |
0.544** |
0.912 |
|
Nightmares |
Q33 |
21.49 |
0.86*** |
0.485** |
|
|
|
Q34 |
2.69 |
0.84*** |
0.432** |
|
|
|
Q35 |
17.86 |
0.76*** |
0.375** |
|
|
|
Q36 |
18.98 |
0.79*** |
0.576** |
|
|
Factor 2 |
Q37 |
18.15 |
0.77*** |
0.435** |
0.878 |
|
Factors influencing sleep |
Q38 |
21.12 |
0.85*** |
.501** |
|
|
|
Q39 |
18.79 |
0.79*** |
0.362** |
|
|
|
Q40 |
16.33 |
0.71*** |
0.366** |
|
|
|
Q41 |
18.94 |
0.79*** |
0.487** |
|
|
|
Q42 |
12.69 |
0.59*** |
0.552** |
|
|
|
Q43 |
13.29 |
0.61*** |
0.586** |
|
|
Factor 7 |
Q44 |
20.77 |
0.84*** |
0.700** |
0.895 |
|
Impact of sleep complaints on daily functioning |
Q45 |
19.4 |
0.80*** |
0.641** |
|
|
|
Q46 |
20.73 |
0.84*** |
0.691** |
|
|
|
Q47 |
11.68 |
0.54*** |
0.474** |
|
|
|
Q48 |
18.36 |
0.77*** |
0.677** |
|
|
|
Q49 |
15.69 |
0.69*** |
0.651** |
|
|
|
Q50 |
16.87 |
0.73*** |
0.681** |
|
|
Factor |
No |
tvaluea |
(λ)b |
Rc |
Cronbach Alpha 0.945 |
***P < 0.001; **P < 0.01; *P < 0.05
A) The calculated values for all factor loadings of the first and second orders are greater than 1.96 and are therefore significant at the 95% confidence level; B) The specific value, which is denoted by the Lamda coefficient and the statistical symbol λ, is calculated from the sum of the factors of the factor loads related to all the variables of that factor; C) Pearson Correlation coefficient