TABLE 2.

Mean Values for Age and Years of Professional Practice in the Different Age Groups^a

Variable	Mean	SD (σ)	P Value
Age, y
Junior professionals	19.83	1.105
Intermediate professionals	25.54	2.385	<.001
Senior professionals	33.66	4.131
Years of professional practice
Junior professionals	2.50	1.186
Intermediate professionals	7.83	2.623	<.001
Senior professionals	16.19	4.648

^aJunior, aged ≤21 y; intermediate, aged 22–31 y; senior, aged ≥32 y.