Supplementary Table II.

Linear regression model assessing association of steroid drug prescription with abdominal aortic aneurysm (AAA) growth after adjustment for other risk factors^a

Predictor	Estimate	95% CI	P value
Steroid drug prescription	−0.1	−1.4 to 1.2	.875
Follow-up	1.4	1.3 to 1.5	<.001
Initial AAA size	1.0	1.0 to 1.1	<.001
HTN	−0.3	−0.7 to 0.2	.243
Current smoking	−0.2	−0.6 to 0.2	.305
Aspirin	0.2	−0.2 to 0.6	.407
Steroid drug prescription × follow-up	0.1	−0.6 to 0.7	.886

CI, Confidence interval; HTN, hypertension.

Boldface P values represent statistical significance.

^aRandom effects: residual variance, 10.79; number of included patients, 609; marginal correlation coefficient, 0.74; conditional correlation coefficient, 0.74.