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Table 4 Relationship between objectively and subjectively measured sleep variables

From: Objective and subjective assessment of sleep in chronic low back pain patients compared with healthy age and gender matched controls: a pilot study

 

Objective

Subjective

r-value

p-value

Control Group (n-15)

    

Total Sleep Time (mins) mean (SD)

399.13 (40.8)

439.33 (42.6)

0.778

<.001 †

Sleep Efficiency (%) mean (SD)

85.83 (4.4)

95.33 (5.8)

0.417

.42

Sleep onset Latency (mins) mean (SD)

9.43 (10.2)

11.73 (14.2)

0.730

<.002 †

Awakenings after Sleep Onset (mins) mean (SD)

32.0 (9.22)

7.4 (8.06)

.006

.984

CLBP Group (n = 15)

    

Total Sleep Time (mins) mean (SD)

434.33 (76.9)

381.66 (73.5)

0.795

<.000†

Sleep Efficiency (%) mean (SD)

73.43 (16.5)

77.81 (7.8)

0.298

.33

Sleep onset Latency (mins) mean (SD)

45.33 (27.7)

9.28 (11.1)

0.343

.251

Awakenings after Sleep Onset (mins) mean (SD)

43.3 (15.8)

24.4 (30.4)

.072

.798

  1. † p < 0.000