Assessment of the Psychometric Properties of the Holland Sleep Disorders Questionnaire in the Iranian Population

Table 4

Factors extracted after exploratory analysis.

Total variance explained
Component	Initial eigenvalues			Extraction sums of squared loadings			Rotation sums of squared loadings
	Total	% of variance	Cumulative %	Total	% of variance	Cumulative %	Total	% of variance	Cumulative %
1	6.109	19.092	19.092	6.109	19.092	19.092	4.747	14.835	14.835
2	4.470	13.970	33.062	4.470	13.970	33.062	4.003	12.509	27.344
3	3.840	11.998	45.061	3.840	11.998	45.061	3.669	11.466	38.810
4	2.208	6.900	51.961	2.208	6.900	51.961	3.456	10.800	49.610
5	1.874	5.856	57.817	1.874	5.856	57.817	2.440	7.624	57.233
6	1.632	5.101	62.918	1.632	5.101	62.918	1.819	5.684	62.918
7	1.295	4.046	66.964
8	0.998	3.120	70.084
9	0.973	3.040	73.124
10	0.880	2.750	75.873
11	0.776	2.424	78.297
12	0.730	2.282	80.579
13	0.664	2.076	82.656
14	0.613	1.916	84.571
15	0.549	1.716	86.287
16	0.527	1.648	87.935
17	0.457	1.428	89.363
18	0.429	1.342	90.705
19	0.405	1.265	91.970
20	0.385	1.202	93.172
21	0.332	1.037	94.208
22	0.302	0.945	95.153
23	0.258	0.806	95.959
24	0.234	0.730	96.689
25	0.230	0.720	97.409
26	0.184	0.574	97.983
27	0.154	0.483	98.466
28	0.145	0.455	98.921
29	0.121	0.379	99.300
30	0.093	0.291	99.591
31	0.081	0.252	99.843
32	0.050	0.157	100.000