Table 2.

Comparison of measured variables by time.

	Possible range	Study range	M ± SD	Wald X 2	P
Clinical competence
Pretest	47–235	53–235	189.0 ± 27.72	7.45	.01
Posttest (referent)	47–235	76–235	195.3 ± 20.94	—	—
Third month	47–235	75–235	193.0 ± 30.25	1.28	.26
Sixth month	47–235	51–235	198.6 ± 30.82	7.56	.01
Twelfth month	47–235	85–235	209.1 ± 24.38	36.25	<.001
Clinical stress
Third month (referent)	0–184	16–157	94.5 ± 29.38	—	—
Sixth month	0–184	27–163	90.49 ± 27.87	1.71	.19
Twelfth month	0–184	23–153	89.8 ± 29.83	1.94	.16
Intention to leave
Third month (referent)	12–60	16–55	32.4 ± 8.11	—	—
Sixth month	12–60	16–48	32.4 ± 6.43	.02	.88
Twelfth month	12–60	17–56	33.4 ± 8.30	2.10	.15