Table 4

Multiple logistic regression analysis showing factors independently associated with 426 general practitioners’ (GPs) proportion of broad-spectrum antibiotics (non-penicillin V) for 6525 respiratory tract infection episodes with prescribed antibiotic for 1 year (December 2004 through November 2005)

n (episodes)Adjusted OR (95% CI)
Patient factors
Patient's gender
 Male (ref)34901
 Female30351.04 (0.91 to 1.19)
Group of diagnoses
 Acute upper respiratory tract infections and symptoms (ref)9221
 Other respiratory tract infections10863.04 (2.28 to 4.05)
 Acute bronchitis5962.71 (1.91 to 3.86)
 Pneumonia4062.10 (1.46 to 3.02)
 Acute otitis and ear pain25361.11 (0.87 to 1.43)
 Acute tonsillitis9790.24 (0.18 to 0.33)
Patient age
 <2 years (ref)15331
 3–4 years28881.13 (0.94 to 1.35)
 5–6 years21040.79 (0.66 to 0.96)
Doctor factors
Doctor's gender
 Male (ref)43101
 Female22150.83 (0.56 to 1.24)
Practice location
 City (ref)36891
 Rural28361.07 (0.72 to 1.59)
 Practice type
 Group (ref)60381
 Single4871.21 (0.61 to 2.34)
Educational level
 GP specialist (ref)56581
 Not specialist8670.53 (0.30 to 0.94)
Doctor's age
 28–43 (ref)18781
 44–4919270.71 (0.43 to 1.19)
 50–5414891.06 (0.62 to 1.80)
 55–6712310.85 (0.49 to 1.49)
Patient contacts per year
 309–2302 (ref)9551
 2303–302813671.48 (0.90 to 2.44)
 3029–371118891.23 (0.74 to 2.06)
 3712–1125223141.44 (0.85 to 2.46)
Antibiotic prescription rate (%)
 0–15.60 (ref)5801
 15.61–23.6412361.15 (0.69 to 1.90)
 23.65–33.3319421.37 (0.84 to 2.23)
 33.34–77.7827673.33 (2.01 to 5.54)
  • Significant values in bold, p<0.05.