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Table 1 Baseline characteristics in patients and volunteers

From: Mapping of lumbar multifidus stiffness Quantification in ankylosing spondylitis with shear-wave elastography

Variables

Patients (n = 30)

Controls (n = 27)

P

Sex (male/female)

27/3

23/4

0.697

BMI (kg/m2)

22.04 (19.12–25.89)

21.67 (20.45–23.38)

0.949

Left YM (kPa)

27.80 (16.10–43.33)

16.40 (11.40–22.50)

0.004

Right YM (kPa)

22.25 (15.73–38.08)

13.00 (9.90–19.20)

0.002

Left P-CSA (%)

11.12 (2.86–27.88)

28.89 (10.32–38.40)

0.020

Right P-CSA (%)

16.33 (2.11–29.75)

23.73 (19.14–34.98)

0.053

Left P- thickness (%)

9.44 (4.34–20.04)

21.50 (14.36–30.41)

0.001

Right P- thickness (%)

16.60 ± 10.71

20.39 ± 10.04

0.176 (95%CI: -9.311–1.743)