Prescription of antiviral drugs during the 2009 influenza pandemic: an observational study using electronic medical files of general practitioners in the Netherlands

Table 2 Factors influencing a prescription of oseltamivir according to clinical guidelines in 351 patients with antiviral medication

	Univariate analysis		Adjusted multilevel analysis
Variable	OR	(95% CI)	OR	(95% CI)	P-value
Age at prescription (continuous)	0.87	(0.83 to 0.91)	0.84	(0.80 to 0.90)	<0.001
Age-squared	1.00	(1.00 to 1.00)	1.00	(1.00 to 1.00)	<0.001
Number of contacts with GP in 2009
<6	ref	-	ref	-
6 or more	3.00	(1.87 to 4.82)	2.19	(1.18 to 4.08)	0.014
Total number of prescriptions in 2009*
<8	ref	-	ref	-
8 or more	4.60	(2.80 to 7.57)	3.24	(1.63 to 6.42)	0.001

ISSN: 2050-6511