Table 1

Comparison between practices that use the C-reactive protein rapid test and practices that do not.

Practices using CRP rapid tests (n = 281)Practices not using CRP rapid tests (n = 86)
Antibiotic prescribing rate for upper RTIs (% [95% CI])
 Acute sinusitis59 (56 to 62)78 (73 to 82)
 Acute tonsillitis42 (40 to 44)46 (42 to 50)
 Acute otitis48 (45 to 50)48 (43 to 53)
RTI patient characteristics
 Median (IQR) age of patients with RTIs in years26 (4–47)27 (4–48)
 Median (IQR) age of patients with sinusitis in years40 (31–53)41 (31–54)
 Percentage (95% CI) of female patients with RTIs56 (55 to 57)59 (57 to 60)
 Percentage (95% CI) of female patients with sinusitis68 (65 to 71)72 (67 to 76)
 Median (IQR) of patients with RTIs per GP47 (34–58)47 (35–70)
Practice characteristics
 Percentage (95% CI) of GPs in group practices64 (58 to 70)57 (48 to 68)
 Median (IQR) of patients listed per practice2150 (1600–3900)1875 (1610–3050)
 Median (IQR) age of GPs (years)49 (45–54)52 (46–56)
 Percentage (95% CI) of female GPs36 (25 to 47)38 (32 to 45)
 Percentage (95% CI) of GPs with high workloada50 (44 to 56)55 (44 to 66)
  • aSelf-assessed. CRP = C-reactive protein; IQR = interquartile range; RTI = respiratory tract infection.