| UK independent panel[4] 10,000 women aged 50 screened every three years for 20 years | Euroscreen group[5] 1,000 women aged 50 screened every two years for 20 years and followed up for 30 years | Harding Centre[6], Based on Nordic Cochrane review[13] 2,000 women >50 yrs screened for 10 years | ||||||
---|---|---|---|---|---|---|---|---|---|
Population time frame | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 | ITT | PP | ITT | PP | ITT | PP | |||
 | Invited | Not invited | Screened | Invited | Not invited | Screened | Invited | Not invited | Screened* |
Cancer specific deaths | - | - | - | 21-23 | 30 | 21-23 | 7 | 8 | 6.6 |
Prevented deaths | 43 | - | 56 | 7-9 | - | 12-14 | 1 | Â | 1.4 |
Cancer incidence | 681 | 552 | 720 | 71 | 67 | 73 | Â | Â | Â |
Additional cancer | 129 | - | 168 | 4 | - | 6 | 10 | Â | 14.2 |
Ascertainments | Â | Â | Â | 100 | Â | 143 | Â | Â | Â |
 Non invasive |  |  |  | 70 |  | 100 |  |  |  |
 Invasive |  |  |  | 30 |  | 43 |  |  |  |
Psychological distress | Â | Â | Â | Â | Â | Â | 200 | Â | 286 |