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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