TABLE 3.

Test-retest Reliability and Distribution of the SC-LSIQ

SC-LSIQ	First Test	Second Test	ICC (CI)
Total	7.88±4.95	7.71±5.01	0.98 (0.98–0.99)
1	0.55±0.5	0.55±0.5	0.97 (0.95–0.98)
2	0.57±0.5	0.56±0.5	0.97 (0.96–0.98)
3	0.56±0.5	0.55±0.5	0.98 (0.97–0.99)
4	0.55±0.5	0.55±0.5	0.98 (0.97–0.99)
5	0.57±0.5	0.56±0.5	0.98 (0.97–0.99)
6	0.39±0.49	0.38±0.49	0.90 (0.86–0.92)
7	0.39±0.49	0.38±0.49	0.90 (0.86–0.93)
8	0.43±0.5	0.42±0.49	0.92 (0.89–0.94)
9	0.42±0.5	0.41±0.49	0.92 (0.89–0.94)
10	0.42±0.5	0.4±0.49	0.94 (0.92–0.96)
11	0.63±0.49	0.61±0.49	0.97 (0.96–0.98)
12	0.61±0.49	0.6±0.49	0.97 (0.96–0.98)
13	0.61±0.49	0.59±0.49	0.97 (0.96–0.98)
14	0.59±0.49	0.56±0.5	0.98 (0.97–0.99)
15	0.58±0.5	0.56±0.5	0.98 (0.97–0.99)

CI indicates confidence interval; ICC, Intraclass Correlation Coefficient; SC-LSIQ, simplifided Chinese version Lumbar Spine Instability Questionnaire.