Adverse events recording in electronic health record systems in primary care

Table 3 OR and 95%-CI for a medication adverse event recorded for an patient within a practice

	Empty model	Model 1^a	Model 2^b
Fixed effects
Patient characteristics
Age		1.03 (1.03–1.03)^c	1.00 (1.00–1.01)
Gender
Male		1	1
Female		2.07 (1.97–2.17)	1.64 (1.57–1.72)
Number of different medicines prescribed
0			1
1–4			9.93 (8.40–11.73)
5–9			34.74 (29.37–41.09)
≥10			81.22 (68.49–96.33)
General effects at practice level
Practice variance (SE)	0.48 (0.05)	0.47 (0.05)	0.46 (0.05)
MOR	1.94	1.92	1.92
ICC	0.129	0.124	0.124

SE standard error, MOR Median Odds Ratio, ICC intraclass correlation coefficient
^amodel 1 adjusted for age and gender, ^bmodel 2 adjusted for age, gender, number of different medicines prescribed. All models were adjusted for software package used by the general practice
^crepresented as Odds Ratio (95% confidence interval)

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