Table 5.

Odds ratios (ORs) and their 95% confidence intervals (CIs) for isometric elbow and hand strength measured by the Good Strength and Jamar dynamometers. Age at plexus surgery, sex, type of injury, and congruency of radiohumeral joint were considered as independent covariates in the logistic regression models. A strength ratio of > 0.89 between the affected and the unaffected side was considered normal

		Grip strength (Jamar)			Grip strength (GS)			Elbow flexion (GS)			Elbow extension (GS)
		(> 0.89)			(> 0.89)			(> 0.89)			(> 0.89)
Characteristic	n	OR	95% CI	p-value	OR	95% CI	p-value	OR	95% CI	p-value	OR	95% CI	p-value
Age (months)
< 3	67	1			1			1			1
> 3	40	1.2	0.48–3.0	0.7	0.5	0.56–4.7	0.3	0.6	0.25–1.6	0.3	0.8	0.34–2.02	0.7
Sex
F	65	1			1			1			1
M	42	1	0.70–2.4	0.9	1	0.93–8.0	0.07	0.6	0.26–1.5	0.3	1.9	0.81–4.5	0.1
Type of injury
no avulsion	69	1			1			1			1
avulsion	38	0.3	0.11–0.76	0.01	0.4	0.16–1.04	0.06	0.3	0.12–0.79	0.01	0.5	0.23–1.3	0.2
Congruency of radiohumeral joint
yes	89	1			1			1			1
no	18	0.2	0.035–0.79	0.02	0.2	0.073–0.70	0.01	0.4	0.14–1.7	0.3	0.3	0.093–0.95	0.04