Table 4.

Odds ratios (ORs) and their 95% confidence intervals (CIs) for shoulder rotation strength (Good Strength; Metitur). Age at plexus surgery, sex, type of injury, and congruency of glenohumeral joint were considered as independent covariates in logistic regression models. A strength ratio of > 0.89 between the affected and the unaffected side was considered normal

		Shoulder external rotation			Shoulder internal rotation
		(ratio>0.89)			(ratio >0.89)
Characteristic	n	OR	95% CI	p-value	OR	95% CI	p-value
Age (months)
< 3	67	1			1
> 3	40	1.8	0.66–4.8	0.3	2.2	0.89–5.40	0.09
Sex
F	65	1			1
M	42	1.1	0.41–2.9	0.9	1.8	0.79–4.3	0.2
Type of injury
no avulsion	69	1			1
avulsion	38	0.4	0.13–1.2	0.09	0.4	0.14–0.89	0.03
Congruency of glenohumeral joint
yes	80	1			1
no	15	1.3	0.36–4.7	0.7	2.2	0.69–6.7	0.2