Table 4.

Results of statistical analysis of correct answers by Pearson’s χ² test (groups: A = control, B = study; (1) = less experienced, (2) = experienced)

	Extent			Staging			Grading
Groups	Σ	%	p	Σ	%	p	Σ	%	p
(1)	64	74.4	0.207	47	54.7	0.001	52	60.5	< 0.001
(2)	66	82.5		63	78.8		68	85.0
A	62	73.8	0.154	44	52.4	< 0.001	42	50.0	< 0.001
B	68	82.9		66	80.5		78	95.1
A (1)	30	71.4	0.535 0.905 0.118	15	35.7	< 0.001 0.707 0.026	12	28.6	< 0.001 0.020  < 0.001
B (1)	34	77.3		35	79.5		40	90.9
A (2)	32	76.2		29	69.0		30	71.4
B (2)	34	89.5		34	89.5		38	100.0