Effect of manipulation technique using ultrasound-guided cervical nerve root block on range of motion at the shoulder joint in frozen shoulder: a retrospective study

Journal of Experimental Orthopaedics

Table 1 Results of multiple regression analysis for ROM improvement

Dependent variable	Adjusted R²	Independent variable	Estimate	p-value
Flexion	0.011	Sex	5.014	0.006*
(n = 858)		Age	− 0.025	0.79
		Duration of symptoms	− 0.343	0.03
Abduction	0.001	Sex	2.392	0.35
(n = 855)		Age	0.046	0.72
		Duration of symptoms	− 0.380	0.09
External rotation	− 0.001	Sex	2.157	0.21
(n = 790)		Age	− 0.058	0.53
		Duration of symptoms	0.077	0.61