Table 3. Median Bias and Relative Percentage Bias Introduced by MRA and EHR Data in Estimating Aspirin, BP, and Smoking Performance Scores.

Data	Estimate (95% BCI), %
	Aspirin	BP	Smoking
MRA
Bias	1.04 (–5.01 to 7.13)	5.63 (–4.89 to 16.17)	2.64 (–7.19 to 12.87)
Relative percentage bias	1.39 (–6.45 to 9.95)	7.05 (–6.10 to 23.80)	3.17 (–8.20 to 17.01)
EHR
Bias	0.02 (–6.10 to 6.14)	0.16 (–10.79 to 11.09)	–7.62 (–18.43 to 3.59)
Relative percentage bias	0.02 (–7.86 to 8.57)	0.22 (–13.48 to 16.26)	–9.16 (–21.17 to 4.70)

Abbreviations: BCI, bayesian credible interval; BP, blood pressure; EHR, electronic health record; MRA, medical record abstraction.