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Table 4 Potential factors influencing the prescription of oseltamivir to 2,242 influenza patients not at high risk

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

  Prescription of oseltamivir, n of patients (%) Univariate analysis
Variable No   Yes   OR (95% CI)
Patient characteristics       
Gender       
 Male 1,039 (47.5) 29 (52.7) ref -
 Female 1,148 (52.5) 26 (47.3) 0.81 (0.47 to 1.39)
Age at diagnosis       
 2 to 14 yrs 819 (37.4) 16 (29.1) 0.69 (0.37 to 1.29)
 15 to 24 yrs 411 (18.8) 12 (21.8) 1.03 (0.52 to 2.06)
 25 to 59 yrs 957 (43.8) 27 (49.1) ref -
Chronic health condition not at high risk       
 No 1,754 (80.2) 45 (81.8) ref -
 Yes 433 (19.8) 10 (18.2) 0.90 (0.45 to 1.80)
Number of contacts with GP in 2009       
 <6 1,468 (67.1) 36 (65.5) ref -
 6 or more 719 (32.9) 19 (34.5) 1.08 (0.61 to 1.89)
Total number of prescriptions in 2009*       
 <8 1,888 (86.3) 41 (74.5) ref -
 8 or more 299 (13.7) 14 (25.5) 2.16 (1.16 to 4.00)
Practice characteristics       
Type of practice       
 Solo practice 706 (32.3) 24 (43.6) ref -
 Duo practice 437 (20.0) 8 (14.6) 0.54 (0.24 to 1.21)
 Group practice 1,044 (47.7) 23 (41.8) 0.65 (0.36 to 1.16)
Dispensing practice 101 (4.6) 2 (3.6) 0.78 (0.19 to 3.24)
Urbanicity practice location       
 (Very) strongly urban 1,116 (51.0) 27 (49.1) 0.84 (0.42 to 1.68)
 Moderately urban 418 (19.1) 12 (21.8) ref -
 Mildly/not urban 653 (29.9) 16 (29.1) 0.85 (0.40 to 1.82)
  1. GP = general practitioner; OR = odds ratio; CI = confidence interval.
  2. *Excluding oseltamivir prescriptions.