Table 4

Sensitivity analysis

VariablePer cent with allopurinol prescription 2005–2011 among 2011 prevalent cases95% CIPer cent with allopurinol prescription 2011 among 2011 incident cases95% CI
All73.4(72.4 to 74.3)60.6(58.1 to 63.0)
Education (years)
 0–973.8(72.3 to 75.4)59.4(55.4 to 63.35)
 10–1272.9(71.4 to 74.4)59.5(55.4 to 63.65)
 13–1472.9(69.4 to 76.3)64.7(57.0 to 72.4)
 15+71.6(68.2 to 74.9)59.3(52.0 to 66.7)
Income
 Low74.1(71.1 to 77.1)64.5(57.5 to 71.6)
 Middle73.9(72.7 to 75.1)61.6(58.6 to 64.6)
 High72.3(69.3 to 75.3)61.34(53.9 to 68.8)
Occupation
 White collar, high skilled71.0(68.1 to 74.0)60.41(53.7 to 67.1)
 White collar, low skilled72.2(69.0 to 75.5)62.14(55.2 to 69.1)
 Blue collar, high skilled76.1(72.6 to 79.5)51.51(43.3 to 59.8)
 Blue collar, low skilled72.9(68.5 to 77.2)61.71(56.3 to 67.1)
  • The prescriptions of allopurinol (delivered by a patient at any pharmacy) among diagnosed gout cases by socioeconomic group. A more stringent definition of gout is, any M10 diagnostic code according to the ICD-10 ever registered by a physician within secondary care (internal medicine or rheumatology) or at least twice by any other physician.

  • ICD-10, International Classification of Diseases 10th Edition.