Table 3.

Patient-level model of risks associated with prescribing or monitoring errors (n = 1777)

Factor	Univariate models (model 1)			Multivariable models (model 2)
	Odds ratio	95% CI	P-value	Odds ratio	95% CI	P-value
Sex
Malea	1.00			1.00
Female	0.76	0.56 to 1.02	0.064	0.66	0.48 to 0.92	0.013
Number of drugs	1.17	1.13 to 1.20	<0.001	1.16	1.12 to 1.19	<0.001
Age category, years
15–64a	1.00			1.00
0–14	1.53	0.99 to 2.35	0.053	1.87	1.19 to 2.94	0.006
65–74	2.69	1.73 to 4.20	<0.001	1.68	1.04 to 2.73	0.035
≥75	4.26	2.81 to 6.47	<0.001	1.94	1.19 to 3.19	0.008
Dispensing practice
Non dispensinga	1.00			1.00
Dispensing practice	1.05	0.73 to 1.51	0.781	0.70	0.26 to 1.88	0.476
Training practice
Traininga	1.00		1.00
Not a training practice	1.33	0.98 to 1.81	0.065	1.39	0.97 to 2.01	0.075
Practice size
5000–10 000a	1.00			1.00
<5000 patients	0.83	0.58 to 1.17	0.281	0.88	0.58 to 1.34	0.553
>10 000 patients	0.74	0.49 to 1.11	0.147	0.56	0.31 to 0.99	0.047
Location
Urbana	1.00			1.00
Rural practice	1.03	0.74 to 1.44	0.849	1.06	0.43 to 2.58	0.905

^aReference group.