TABLE 2.

Score Distribution and Internal Consistency of the SC-LSIQ

SC-LSIQ	Z-Skewness	Item-total Score Correlation(r)	Cronbach α	Cronbach α If Item Deleted	Ceiling Effect (%)	Floor Effect (%)
SC-LSIQ-total	−0.15	—	0.911	—	5	0.6
1	−0.22	0.61	—	0.91	—	—
2	−0.30	0.66	—	0.90	—	—
3	−0.25	0.65	—	0.90	—	—
4	−0.22	0.69	—	0.90	—	—
5	−0.30	0.69	—	0.90	—	—
6	0.44	0.58	—	0.91	—	—
7	0.44	0.58	—	0.91	—	—
8	0.28	0.42	—	0.91	—	—
9	0.33	0.42	—	0.91	—	—
10	0.33	0.51	—	0.91	—	—
11	−0.53	0.65	—	0.90	—	—
12	−0.44	0.61	—	0.91	—	—
13	−0.44	0.65	—	0.90	—	—
14	−0.36	0.71	—	0.90	—	—
15	−0.33	0.69	—	0.90	—	—

SC-LSIQ indicates simplifided Chinese version Lumbar Spine Instability Questionnaire.