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Table 2 Summary statistics of cost comparisons between the OCC-Q and the administrative database results*

From: Good agreement between questionnaire and administrative databases for health care use and costs in patients with osteoarthritis

  Minimum 0.25 Median Mean 0.75 Maximum
General practitioner costs       
OCC-Q 0 62 62 80.08 124 248
General practitioner database 0 62 62 71.80 86 310
Medication costs       
OCC-Q† 0 9.91 26.51 34.30 48.94 210.12
New Zealand Health Information System 0 3.22 21.22 36.79 50.8 305.14
Hospital costs       
OCC-Q 0 0 37.74 393.53 233 14,599.83
Otago District Health Board query 0 0 0 376.87 157.52 14,599.83
Total costs       
OCC-Q† 0 88.49 219.99 516.52 326.63 15,141.16
Databases 0 72.59 144.78 485.46 243.40 15,029.33
  1. *All monetary values are in 2009 New Zealand dollars (NZD); the conversion rate to US dollars (USD) at 2009 purchasing power parity is $1 NZD = $0.63 USD.
  2. † The first imputed dataset was used for descriptive statistics
  3. Abbreviations: OCC-Q, Osteoarthritis Cost and Consequences Questionnaire.