Table 2.

Survey questions that are significantly related to radiation dose in univariate analysis, the mean score for each question, the percent of imaging centers whose respondents strongly agreed or disagreed with the statement, and the percent reduction in average dose and probability of high dose examinations if all facilities strongly agreed with the question

Survey Questions‡	ean Score	Percent of Respondents who		Average Dose*		High Dose**
		Agree†	Disagree††	% Reduction p value		%Reduction p value
A. Practice Systems				0.3	0.96	17	0.34
We track patient safety measures (non-radiology)	55	36%	47%	10	.01	32	<.001
B. Practice Readiness				8	.17	39	.016
1.We assess the impact of CT changes made	73	71%	8%			31	.01
2.Rad leaders support dose optimization activities	83	87%	2%	7	<.001	27	<.001
3.We lowered CT dose in past year	83	85%	3%	7	.01	25	<.001
4.We review processes & identify areas for improvement	75	71%	8%	3	0.27	18	.03
5.Leaders of optimization are enthusiastic	69	72%	2%	5	0.13	23	.03
C. Change Strategies				7	.11	32	.03
1.We set specific goals for improving radiation dose and image quality	55	32%	24%	8	.04	37	<.001
2.We organize a team to improve CT dose	51	33%	31%	8	.01	33	<.001
3.We tailor decisions to site needs	66	44%	15%	8	.04	31	.02
4.We pilot test process changes before implementation	58	37%	23%	8	.04	30	.03
5.We standardized workflows to encourage dose optimization	83	65%	1%	5	.03	31	.01
D. Miscellaneous
1.Number of protocols	5	-	-	19	.01	38	001
2.Number of active QI projects on radiation dose		-	-	6	.01	22	.01
3.We obtain clear images of abdomen CT	92	92%	9%	2	<.001	8	<.001

^‡Abbreviated versions of the questions

^†Includes responses of “Yes, and Works Well” or combined responses of “Agree” and “Strongly Agree,” depending on question

^††Includes responses of “No” or combined responses of “Disagree” and “Strongly Disagree,” depending on question