Development and Validation of Sleep Disturbance Questionnaire in Patients with Acute Coronary Syndrome

Table 1

Cronbach’s alpha if item deleted and item weighting.

Number	Cronbach’s alpha if item deleted	Item weighting
1	.797	0.807
2	.795	0.762
3	.794	0.713
4	.807	0.808
5	.803	0.526
6	.790	0.608
7	.795	0.604
8	.793	0.405
9	.804	0.451
10	.798	0.418
11	.797	0.756
12	.793	0.784
13	.803	0.696
14	.798	0.690
15	.795	0.574
16	.802	0.666
17	.800	0.676
18	.798	0.714
19	.800	0.432
20	.796	0.538
21	.792	0.765
22	.796	0.600
23	.810	0.838