Table 1 Validity of breast cancer flags in individual datasets compared with the Cancer Registry, July 2004-December 2008
Data set | Breast cancer flags | Positive predictive value | Sensitivity | Specificity |
|---|---|---|---|---|
45 and Up baseline survey1 | Self-reported diagnosis of breast cancer 2 within a year of birth-year reported | 49.8% | 84.7% | 99.6% |
Admitted Patient Data Collection | Diagnosis3 of invasive breast cancer | 85.9% | 86.1% | 99.8% |
Lumpectomy | 52.0% | 60.7% | 99.2% | |
Mastectomy | 70.8% | 32.6% | 99.8% | |
Lumpectomy OR mastectomy | 56.4% | 84.4% | 99.1% | |
Lumpectomy AND diagnosis of invasive breast cancer | 89.0% | 59.1% | 99.9% | |
Mastectomy AND diagnosis of invasive breast cancer | 85.4% | 31.8% | 99.1% | |
(Lumpectomy or mastectomy) AND diagnosis of invasive breast cancer | 87.7% | 82.3% | 99.8% | |
(Lumpectomy or mastectomy) OR diagnosis of invasive breast cancer | 56.5% | 88.2% | 99.0% | |
Mastectomy OR diagnosis of invasive breast cancer | 79.7% | 87.6% | 99.7% | |
Lumpectomy OR diagnosis of invasive breast cancer | 58.2% | 87.6% | 99.1% | |
Medicare Benefits Schedule | Breast radiotherapy | 72.8% | 57.6% | 99.7% |
Pharmaceutical Benefits Scheme | Dispensed medicine for breast cancer 4 | 45.5% | 65.4% | 98.9% |