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Table 1 Test and retest scores for the 9-item Sleep Problems Index of the Medical Outcomes Study Sleep Scale.

From: Reliability of a 1-week recall period for the Medical Outcomes Study Sleep Scale (MOS-SS) in patients with fibromyalgia

Recall period Test (n) Retest (n) Change (n) p
4 weeks 59.01 ± 14.85 (79) 57.23 ± 14.46 (79) -2.0 ± 6.7 (78) 0.01
1 week 61.9 ± 15.8 (62) 59.9 ± 15.2 (62) -2.0 ± 9.5 (62) 0.11