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Table 1 Descriptive data on subjects

From: Reliability of diagnostic ultrasound in measuring the multifidus muscle

Subjects, total.
Total (N) Male (N) Female (N) Mean age (Yrs.) Age range (Yrs.) SD (Yrs.) LBP (N) Neck/Midback pain (N) Extremity pain (N) Pain free (N)
120 64 56 38 20-69 ±12 88 23 4 5
Study objective 1
30 18 12 38 20-69 ±13 25 5 0 0
Study objective 2
30 14 16 37 20-65 ±12 20 5 1 4
Study objective 3
30 15 15 38 20-59 ±11 23 7 0 0
Study objective 4
30 17 13 40 20-68 ±11 20 6 3 1