Table 5 Costs generated by method of reporting: agreement between the OCC-Q questionnaire and administrative databases*†
OCC-Q ($) Mean ± SD | Databases ($) Mean ± SD | ρ c‡ | Mean difference ($) (95% CI)§ | 95% limits of agreement ($)|| | |
|---|---|---|---|---|---|
GP services | |||||
Co-payments | 37.59 ± 29.46 | 29.62 ± 29.53 | 0.502 | -7.97 (-16.39, 0.46) | -67.28 to 51.35 |
Societal cost | 79.84 ± 60.84 | 67.08 ± 61.38 | 0.502 | -14.24 (-30.92, 2.44) | -131.63 to 103.15 |
Medications | |||||
Subsidy | |||||
Paracetamol n = 49 | 2.96 ± 2.90 | 3.57 ± 6.36 | 0.358 | 0.60 (-1.00, 2.21) | -10.58 to 11.78 |
Imputed (n = 50) | 3.02 ± 2.93 | 3.50 ± 6.32 | 0.360 | 0.58 (-1.02, 2.13) | -10.53 to 11.64 |
Opiates | 1.89 ± 6.36 | 3.83 ± 11.54 | 0.645 | 1.94 (-0.24, 4.13) | -13.45 to 17.33 |
Paracetamol & opiates | 3.20 ± 7.16 | 2.84 ± 7.50 | 0.807 | -0.36 (-1.66, 0.93) | -9.48 to 8.75 |
NSAID n = 45 | 4.12 ± 7.05 | 3.66 ± 7.45 | 0.876 | -0.44 (-1.52, 0.64) | -7.63 to 6.74 |
Imputed (n = 50) | 4.74 ± 7.60 | 3.59 ± 7.11 | 0.789 | -1.10 (-2.42, 0.22) | -10.40 to 8.19 |
Pantoprazole | 0.43 ± 2.13 | 0.67 ± 2.74 | 0.716 | 0.24 (-0.28, 0.77) | -3.44 to 3.92 |
Omeprazole n = 45 | 2.89 ± 6.34 | 17.30 ± 50.56 | 0.140 | 14.41 (0.30, 28.51) | -77.62 to 106.44 |
Imputed (n = 50) | 3.56 ± 6.35 | 19.03 ± 49.32 | 0.137 | 15.45 (2.42, 28.48) | -76.24 to 107.15 |
Amitriptyline | 0.45 ± 1.72 | 0.30 ± 1.27 | 0.225 | -0.15 (-0.68, 0.36) | -3.91 to 3.61 |
Co-payment | |||||
Paracetamol n = 40 | 5.08 ± 16.52 | 0.83 ± 1.36 | -0.006 | -4.25 (-9.57, 1.07) | -36.79 to 28.59 |
Imputed (n = 50) | 8.88 ± 36.86 | 0.66 ± 1.26 | -0.008 | -12.34 (-22.55, -2.13) | -84.19 to 59.51 |
Opiates | 0.30 ± 0.91 | 0.40 ± 1.18 | 0.716 | 0.10 (-1.24, 0.32) | -1.48 to 1.68 |
Paracetamol & opiates¶ | 1.39 ± 4.05 | 0.48 ± 1.85 | 0.168 | -0.91 (-2.06, 0.24) | -9.00 to 7.18 |
NSAID n = 44 | 1.23 ± 4.98 | 0.93 ± 1.66 | 0.151 | -0.30 (-1.77, 1.18) | -9.76 to 9.21 |
Imputed (n = 50) | 1.18 ± 4.68 | 0.88 ± 1.61 | 0.148 | -0.28 (-1.58, 1.02) | -9.41 to 8.85 |
Pantoprazole | 0.12 ± 0.59 | 0.12 ± 0.59 | 1.00 | 0.00 (0.00, 0.00) | 0.00 to 0.00 |
Omeprazole n = 44 | 0.82 ± 2.45 | 0.47 ± 1.11 | 0.176 | -0.34 (-1.08, 0.40) | -5.22 to 4.54 |
Imputed (n = 50) | 1.06 ± 3.31 | 0.42 ± 1.05 | 0.143 | -0.54 (-1.22, 0.14) | -5.34 to 4.26 |
Amitriptyline | 0.18 ± 0.72 | 0.06 ± 0.42 | -0.031 | -0.12 (-0.36, 0.12) | -1.81 to 1.58 |
Total medication cost n = 31 | 24.36 ± 25.04 | 41.00 ± 59.76 | 0.144 | -16.63 (-38.49, 5.23) | -135.82 to 102.56 |
Imputed (n = 50) | 30.40 ± 39.83 | 36.79 ± 52.90 | 0.152 | 5.70 (-11.51, 22.91) | -115.41 to 126.81 |
Hospital-based services | |||||
Emergency visits | 13.36 ± 66.11 | 13.36 ± 66.11 | 1.00 | 0.00 | 0.00 to 0.00 |
OA-related inpatient events | 292.00 ± 2064.73 | 292.00 ± 2064.73 | 1.00 | 0.00 | 0.00 to 0.00 |
Orthopaedics | 50.41 ± 80.76 | 37.80 ± 81.51 | 0.316 | -9.45 (-35.68, 16.78) | -194.03 to 175.13 |
Rheumatology | 16.76 ± 71.33 | 12.57 ± 65.71 | 0.701 | -4.19 (-12.61, 4.23) | -63.45 to 55.07 |
Medical imaging n = 48 | 24.15 ± 35.57 | 21.13 ± 34.23 | 0.488 | -3.02 (-12.67, 6.63) | -70.94 to 64.90 |
Total hospital costs | 393.53 ± 2054.51 | 376.87 ± 2057.66 | 0.998 | -16.66 (-48.01, 14.68) | -237.25 to 203.93 |
Total health care cost n = 31 | 209.27 ± 167.95 | 192.51 ± 183.74 | 0.606 | -16.75 (-73.84, 40.33) | -328.01 to 294.51 |
Imputed (n = 50) | 513.20 ± 2132.22 | 485.46 ± 2105.69 | 0.997 | -34.05 (-76.65, 8.55) | -333.83 to 265.73 |