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. 2013 Dec 22;11:213. doi: 10.1186/1477-7525-11-213

Table 2.

Forced two-factor solution by principal component with varimax rotation of items from the SHI

 
Initial eigenvalues
Extraction sums of squared loadings
Rotation sums of squared loadings
Component Total % of variance Cumulative % Total % of variance Cumulative % Total
1
3.33
25.59
25.59
3.33
25.59
25.59
2.65
2
1.88
14.42
40.01
1.88
14.42
40.14
2.55
3
1.19
9.15
49.17
 
 
 
 
4
1.07
8.25
57.42
 
 
 
 
5
.99
7.60
65.02
 
 
 
 
6
.95
7.31
72.33
 
 
 
 
7
.78
6.01
78.34
 
 
 
 
8
.73
5.65
83.98
 
 
 
 
9
.59
4.50
88.48
 
 
 
 
10
.49
3.77
92.26
 
 
 
 
11
.44
3.36
95.62
 
 
 
 
12
.32
2.45
98.06
 
 
 
 
13 .25 1.94 100.00        

Note: SHI: Sleep Hygiene Index.