Item response probabilities within each latent class and latent class prevalences for 233 radiologists who were surveyed about their perceptions and use of MQSA mandated medical outcomes audits.

	Item Response Probabilities
Latent Class:	Favorable			Less favorable			Neutral			Unfavorable
Response Category*	Agree	Neutral	Disagree	Agree	Neutral	Disagree	Agree	Neutral	Disagree	Agree	Neutral	Disagree
Trust accuracy of audits	0.87	0.10	0.03	0.88	0.10	0.03	0.41	0.43	0.17	0.00	0.00	1.00
Pay attention to audits	0.95	0.05	0.00	0.70	0.30	0.00	0.00	0.71	0.29	0.51	0.00	0.49
Reports are valuable	0.99	0.01	0.00	0.69	0.31	0.00	0.00	0.83	0.17	0.76	0.00	0.24
Review cancers because of audits	0.91	0.07	0.02	0.40	0.34	0.26	0.73	0.12	0.16	0.16	0.12	0.72
Audits prompt to improve performance	0.94	0.06	0.00	0.00	0.77	0.23	0.16	0.63	0.21	0.76	0.00	0.24
If congress mandates additional requirements I may stop interpreting mammograms	0.25	0.29	0.46	0.51	0.10	0.39	0.17	0.38	0.45	0.37	0.36	0.27
Class Prevalences		0.75			0.13			0.08			0.03

^*See methods section for complete survey questions.