Effect of elbow position on radiographic measurements of radio-capitellar alignment

Table 1 Paired t-tests for the different elbow and forearm positions

Paired t-test for elbow and forearm positions	P
Maximal elbow extension and maximal elbow flexion	0.034
Maximal elbow flexion and elbow flexion at 90°	0.003
Maximal elbow extension and elbow flexion at 90°	0.86
Forearm in neutral and forearm in pronation	0.001
Forearm in neutral and forearm in supination	0.001
Forearm in pronation and forearm in supination	0.28

Table 2 Pearson coefficient correlation power analyses for the different elbow positions and forearm positions

	r	P	Power (Π)
Pearson coefficient correlation for the elbow
Maximal extension and Maximal flexion	-0.0854	0.394	0.84
Maximal flexion and flexion at 90°	0.1948	0.050	0.05
Maximal extension and flexion at 90°	-0.0860	0.390	0.63
Pearson coefficient correlation for the forearm
Neutral and pronation	0.42	0.001	0.99
Neutral and supination	0.34	0.001	0.99
Pronation and supination	0.37	0.55	0.18