recorded in the NCSP Register does not reflect the date on which results were first communicated to the smear-taker or colposcopist. The extent of this cannot be directly determined from the NCSP Register, however audit results (which invariably find better turnaround time performance) suggest that it is a factor which should be considered in interpretation of these results. There are some possible explanations why in some laboratories the turnaround time for cytology with associated HPV triage testing is longer than for other cytology. As the HPV triage test is performed in response to low grade cytology results in a subset of women (those aged 30 years or more without a recent cytological abnormality), the need for the HPV test is only apparent after the cytology result is available. Additionally, as HPV tests are generally performed in batches, laboratories with smaller HPV test volumes may take longer to accrue the required batch sizes, and therefore perform HPV tests less frequently. Caution must be taken when comparing percentages of reporting from this monitoring period to the previous monitoring periods due to changes in the number of reporting laboratories. Differences in percentages from this and previous monitoring reports may be due to differences in caseloads. Figure 64 - Proportion of cytology samples reported within seven working days by laboratory, Target: 90% within seven working days (red line) Figure 65 - Proportion of cytology samples reported within 15 working days by laboratory, Target: 98% within 15 working days (red line) Figure 66 - Proportion of histology samples reported within ten working days by laboratory, Target: 90% within ten working days (red line) Figure 67 - Proportion of histology samples reported within 15 working days by laboratory, Target: 98% within 15 working days (red line) Figure 68 - Proportion of cytology samples with associated HPV triage testing and of all cytology samples reported within 15 days by laboratory, Target: 98% within 15 working days (red line) Indicator 6 – Follow-up women high grade cytology, no histology Definition The proportion of women who have had a cervical sample showing a high grade cytology result for whom a histological report has been received by the NCSP Register. This proportion is a measure of the completeness of follow-up of women with high grade cytology.
DHB Women screened in the last 3 years (hysterectomy-adjusted) (no hysterectomy adjustment) Auckland 78.5 70.8 Bay of Plenty 81.3 71.1 Canterbury 74.6 66.0 Capital & Coast 80.1 71.6 Counties Manukau 74.0 66.2 Hawke's Bay 75.7 66.2 Hutt Valley 77.7 69.0 Lakes 78.5 69.0 Mid Central 75.1 66.0 Nelson Marlborough 79.9 69.4 Northland 73.0 63.5 South Canterbury 77.0 67.0 Southern 79.6 70.1 Tairawhiti 73.7 64.9 Taranaki 79.3 69.9 Waikato 76.2 67.4 Wairarapa 73.6 63.8 Waitemata 75.9 67.6 West Coast 72.3 63.3 Whanganui 75.8 66.1 Total 76.8 68.0 Table 33 - Trends in three-year coverage by DHB (women screened in the previous three years, as a percentage of the hysterectomy-adjusted female population)
Indicator 5.2 – Accuracy of cytology predicting HSIL Table 50 - Positive predictive value of a report of HSIL + SC cytology by laboratory Laboratory Histology available HSIL confirmed by histology No histology Total reports N % N % N % N Anatomical Pathology Services 287 92.0 214 74.6 25 8.0 312 Canterbury Health Laboratories 158 93.5 139 88.0 11 6.5 169 LabPLUS 215 94.3 176 81.9 13 5.7 228 Medlab Central Ltd. 135 94.4 119 88.1 8 5.6 143 Pathlab 114 94.2 95 83.3 7 5.8 121 Southern Community Laboratories 1,026 90.9 801 78.1 103 9.1 1,129 Total 1,935 92.1 1,544 79.8 167 7.9 2,102 Target: 65% - 85% Table 51 - Positive predictive value of a report of ASC-H cytology by laboratory Laboratory Histology available HSIL confirmed by histology No histology Total reports N % N % N % N Anatomical Pathology Services 153 80.1 59 38.6 38 19.9 191 Canterbury Health Laboratories 114 88.4 57 50.0 15 11.6 129 LabPLUS 259 83.8 102 39.4 50 16.2 309 Medlab Central Ltd. 59 83.1 27 45.8 12 16.9 71 Pathlab 87 78.4 33 37.9 24 21.6 111 Southern Community Laboratories 148 80.4 60 40.5 36 19.6 184 Total 820 82.4 338 41.2 175 17.6 995
Mid Central 641 94.1 100.0 94.8 99.1 98.9 91.4 Nelson Marlborough 269 98.9 100.0 88.8 95.2 94.8 91.8 Northland 360 97.8 100.0 90.2 97.8 97.2 93.3 South Canterbury 115 96.5 100.0 88.7 98.3 98.3 91.3 Southern 779 97.6 100.0 89.0 96.4 96.3 91.7 Tairawhiti 201 100.0 100.0 95.3 97.5 97.5 96.5 Taranaki 369 98.6 100.0 89.2 97.8 97.8 92.4 Waikato 1,045 97.9 100.0 96.2 98.9 97.4 96.0 Wairarapa 121 98.3 100.0 95.7 98.3 98.3 96.7 Waitemata 1,701 97.4 100.0 91.8 83.2 82.5 93.1 West Coast 112 96.4 100.0 93.0 97.3 96.4 91.1 Whanganui 232 97.8 100.0 95.0 97.4 97.4 94.0 Private practice 1,315 96.1 100.0 92.5 97.2 93.7 92.1 Total 13,447 97.4 100.0 92.0 94.8 94.0 92.7