Table 2.

Intraclass correlation coefficient between the five tests performed with each syringe in Phase 1.

Syringe	P10	p value	P20	p value
1	0.03 (-8.2-0.89)	0.4	0.3 (-5.6-0.92)	0.3
2	-0.33 (-11.7-0.86)	0.6	0.49 (-3.8-0.94)	0.2
3	0.12 (-7.3-0.9)	0.4	0.63 (-2.5-0.96)	0.2
4	0.15 (-7-0.91)	0.4	0.33 (-5.3-0.93)	0.3
5	0.16 (-6.9-0.91)	0.4	0.8 (-0.6-0.98)	0.06

P10 - maneuver performed with a 10mL syringe; P20 - maneuver performed with a 20mL syringe. Values for the intraclass correlation coefficients and the 95% confidence intervals (95%CI).