Table 3. Attitudes to costs in medical treatment as explicators for estimates deviating from actual price (n=740).

	Physician’s estimate deviated from actual price by ≥50%
	Simvastatin OR (95% CI)	Alendronate OR (95% CI)	Infliximab OR (95% CI)	Natalizumab OR (95% CI)	Escitalopram OR (95% CI)
I consider the cost to society when deciding whether or not to initiate an intervention*	1.0 (0.7-1.5)	1.1 (0.7-1.6)	0.8 (0.5-1.2)	0.6 (0.4-1.0)*	1.0 (0.7-1.4)
I can reduce my referral and prescribing costs without compromising my patients’ health	0.8 (0.5-1.3)	0.4 (0.2-0.6)**	1.4 (0.9-2.3)	1.6 (0.8-3.2)	0.9 (0.6-1.5)
Willing to pay more than 405 to give the patient his/her preferred treatment; injection vs. pill§	1.4 (0.9-2.2)	1.6 (1.0-2.4)*	0.7 (0.5-1.0)	1.2 (0.7-2.1)	1.2 (0.8-1.8)
Estimate of escitalopram (Cipralex) differed from actual price by ≥50%*	1.5 (1.0-2.2)*	2.2 (1.5-3.3)*	1.0 (0.7-1.4)	1.9 (1.2-3.0)**	__

Variable names with an asterisk are part of the basic model. Odds ratios with two asterisks indicate significance at the 1% level and those with one asterisk at 5%. Attitude measurement coding: 1 = agree, 0 = disagree. OR > 1 if physicians who agreed with the statement were more likely to deviate from accurate prices than others; OR <1 if they were less likely to deviate.

^§Explanation provided: injection avoids the trouble of taking the pills every week. Pills cause mild nausea when taken (once a week). In addition the injection is 10% more effective in increasing bone mass than the tablets.