Table 3.

Equity and scenario analyses (expected value analysis; costs and QALYs gained for offering colorectal cancer screening to 50–74-year-olds)

Population groupIntervention cost (NZ$ millions)Net cost (NZ$ millions)QALYs gained (% change from default)ICER
Default model (expected value only analysis)Total$1,510$262104,000$2,530
Non-Māori$1,360$20196,600$2,090
Māori$148$617,060$8,650
Equity analyses
1. Māori background mortality and trend replaced with non-Māori valuesMāori$149$529,140 (29%)$5,670
2. Māori background morbidity replaced with non-Māori valuesMāori$158$617,320 (3%)$8,350
3. (1 and 2)Māori$158$529,490 (34%)$5,460
4. Māori colorectal cancer incidence trends replaced with non-Māori valuesMāori$146$735,920 (−17%)$12,300
5. Māori colorectal cancer incidence replaced with non-Māori valuesMāori$150$438,730 (23%)$4,900
6. (4 and 5)Māori$147$597,200 (2%)$8,150
Discount rate 0%Total$2,420−$168260,000Cost-saving
Non-Māori$2,173−$221241,000Cost-saving
Māori$247$5319,000$2,790
Discount rate 6% (double baseline)Total$1,030$37446,500$8,060
Non-Māori$932$31943,500$7,350
Māori$98$542,950$18,580
Excluding both background morbidity and disease DWsTotal$2,420−$168320,000Cost-saving
(i.e., life years saved)Non-Māori$2,170−$221296,000Cost-saving
Māori$247$5324,390$2,180
Including small morbidity for screening test (i.e., DW ofTotal$1,510$262103,100$2,550
0.000115 per annum applied to everyone screened, atNon-Māori$1,360$20196,100$2,100
each screen)Māori$148$617,010$8,720