Differences and Correlations of Anxiety, Sleep Quality, and Pressure-Pain Threshold between Patients with Chronic Low Back Pain and Asymptomatic People

Table 2

Differences in the PPT between patients with CLBP and asymptomatic people (M ± SD; units: kgf).

	Chronic low back pain (n = 40)	Asymptomatic (n = 40)	t
Levator scapula	4.08 ± 1.61	4.07 ± 1.43	−0.035	0.972
Rhomboid muscle	4.79 ± 1.78	4.45 ± 1.43	−0.981	0.330
Iliopsoas	5.42 ± 2.06	5.07 ± 1.79	−0.825	0.412
Quadratus lumborum	6.24 ± 2.16	6.03 ± 2.24	−0.449	0.654
Erector spinae	7.80 ± 2.50	7.05 ± 2.33	−1.422	0.159
Transversus abdominis	5.82 ± 2.14	5.37 ± 2.07	−0.973	0.333
Gluteus medius	6.28 ± 1.79	5.90 ± 1.86	−0.954	0.343
Piriformis	6.63 ± 2.07	6.45 ± 2.19	−0.391	0.697
Hamstring muscle	6.74 ± 2.46	6.48 ± 2.15	−0.532	0.596
Gastrocnemius	5.33 ± 1.44	5.39 ± 1.55	0.182	0.856